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58results about How to "Slow down time" patented technology

High-strength low-temperature-resisting spheroidal graphite cast iron and preparing method thereof

The invention relates to the field of spheroidal graphite cast iron, in particular to high-strength low-temperature-resisting spheroidal graphite cast iron and a preparing method thereof. The spheroidal graphite cast iron comprises, by mass percent, 3.2% to 3.5% of carbon, 2.1% to 2.3% of silicon, 0.4% to 0.5% of manganese, 0.4% to 0.6% of copper, 0.2% to 0.4% of nickel, 0.2% to 0.4% of molybdenum, 0.04% to 0.06% of magnesium, 0.05% to 0.08% of chromium, 0.005% to 0.008% of titanium, 0.002% to 0.003% of vanadium, not larger than 0.04% of phosphorus, not larger than 0.02% of sulphur and the balance iron. The preparing method of the high-strength low-temperature-resisting spheroidal graphite cast iron comprises following steps: firstly, raw materials are smelted; secondly, spheroidizing treatment and inoculation are carried out; and thirdly, heat treatment is carried out. Through reasonable arrangement of all element components, the tensile strength of the spheroidal graphite cast iron is improved, a proper nucleating agent is prepared, internal inoculation matched with inoculation in a ladle is adopted, the inoculation effect is reinforced, meanwhile, during heat treatment, the heating temperature, the heat preservation time, the cooling rate and the manner are reasonably arranged, the strength and low temperature resistance of the iron are effectively improved, the spheroidal graphite cast iron is high in strength and excellent in low temperature resistance, and the preparing method is simple and efficient.
Owner:HANSHAN COUNTY XINGDA DUCTILE IRON FACTORY

Selecting an interactive application to run while a caller is on hold depending on the caller's expected wait time

The present invention, relates to an automated call distribution platform that has the ability to analyze a call queue and determine if a call qualifies for participation in an interactive application, invite a caller to participate in the application and, if the caller agrees, execute the application, then after completion of the application the call advances in the queue to a position ahead of where it currently resides. Thus, the present invention has both the benefit of lessening the caller's wait in a call queue and allows that automated call distribution platform owner to have its customers participate in an application. An exemplary application may be a survey, that can collect valuable information from the callers.
Owner:SPRINT SPECTRUM LLC

Shift register unit, gate drive circuit and display device

The embodiment of the invention provides a shift register unit, a gate drive circuit and a display device, and can enhance the output capacity of a signal output end and shorten the fall time of output waveform. The shift register unit provided by the invention comprises a first output module, a second output module, an input module, a drop-down control module, a drop-down module and a reset module, wherein under the control of a pull-up control node, the signal of a clock signal end is output to a signal output end; under the signal control of a signal input end, the voltage of a first power supply end is output to the pull-up control node; under the signal control of the signal input end, the signal of a drop-down control node drops down to the voltage of a second power supply end; under the control of the drop-down control node, the signals of the pull-up control node and the signal output end drop down to the voltage of the second power supply end; under the control of a reset signal end, the signal of the first power supply end is output to the drop-down control node. The shift register unit, the gate drive circuit and the display device, provided by the embodiment of the invention, are applied to the production and manufacturing of display panels.
Owner:HEFEI BOE OPTOELECTRONICS TECH +1

Shifting register and grid driving circuit

The invention provides a shifting register and grid driving circuit adopting the same. The shifting register comprises an input signal selection circuit, an output circuit, a pull-down circuit and a voltage raising circuit. The input signal selection circuit is coupled to a node, a first signal source, a second signal source, a first input signal source and a second input signal source. The output circuit is coupled to the node, the output end of the shifting register and the first clock source. The pull-down circuit is coupled to the output end, the second clock source and a reference potential source. The voltage raising circuit is coupled to the node, the output end, the first signal source, the second signal source, the third signal source and the fourth signal source. The shifting register provided by the present invention can shorten the falling time of the pulses it provides.
Owner:AU OPTRONICS CORP

GOA circuit

The invention provides a GOA circuit. Each level of GOA unit of the GOA circuit comprises a pull-up control module, an output module, a pull-down module, a first pull-down maintaining module and a second pull-down maintaining module. The gates of the thirty-second thin film transistor in the first pull-down maintaining module and the thirty-third thin film transistor in the second pull-down maintaining module are electrically connected with second and third nodes respectively. The sources all access a first low-potential signal. The drains all access a scan signal. The sources of the forty-second thin film transistor in the first pull-down maintaining module, the forty-third thin film transistor in the second pull-down maintaining module, and the forty-first thin film transistor in the pull-down module access a second low-potential signal. The potential of the first low-potential signal is greater than the potential of the second low-potential signal. The potential of the second low-potential signal is greater than the low potential of a clock signal. The falling time of the scan signal is shortened, and at the same time the electrical stress of the thin film transistor in the pull-down module can be reduced.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD

Culture medium for effectively prolonging survival time of lactic acid bacteria and preparation method of culture medium

The invention discloses a culture medium for effectively prolonging the survival time of lactic acid bacteria and a preparation method of the culture medium. The culture medium for effectively prolonging the survival time of the lactic acid bacteria is prepared by taking peptone, yeast extract powder, mannan oligosaccharide, skim milk powder, defatted soybean meal, magnesium sulfate heptahydrate, manganese sulfate heptahydrate, dried corn steep liquor powder, a compound additive, sodium dihydrogen phosphate, sodium citrate, citric acid, sodium acetate, Tween-80 and saccharomyces cerevisiae as raw materials; in addition, the compound additive is a mixture of sodium carboxymethylcellulose, sodium alginate, bone meal, royal jelly acid, guar gum and xanthan gum. According to the culture medium for effectively prolonging the survival time of the lactic acid bacteria, the functions of all the raw materials are mutually cooperative, and higher variable bacteria quantity of the lactic acid bacteria can be kept at normal temperature for a long time; in addition, the culture medium has the advantages of simplicity and convenience in operation, easily-obtained raw materials, low cost and high homogenization degree of a product; the lactic acid bacteria is enabled to be more stable in property and higher in biological activity and can be stored for a longer time.
Owner:QILU UNIV OF TECH

Lactobacillus preservative capable of increasing survival rate of liquid lactobacilli at room temperature and application of lactobacillus preservative

The invention provides a lactobacillus preservative capable of increasing the survival rate of liquid lactobacilli at the room temperature and an application of the lactobacillus preservative. With adoption of a lactobacillus body and nutrient suspension technology and a sustained release technology as well as addition of cream, linoleic acid, lecithin, glycerol monostearate and a stabilizer to a medium and regulation of pH value, the storage period of the liquid lactobacilli with high live bacteria quantity is prolonged, the problem of rapid reduction of liquid lactobacilli with high live bacteria quantity due to reduction of the content of nutrients and storage at the normal temperature is solved, and the lactobacilli really play a role in preventing and treating diarrhea and regulating balance of the intestinal flora during use; the lactobacillus preservative as a green, safe and effective microecological agent is applied and popularized.
Owner:青岛云溯源健康科技有限公司

Laryngoscope guide and related method of use

InactiveUS20110201890A1Quickly and efficiently intubatedSlow down timeBronchoscopesLaryngoscopesNeck mobilityGlottis
A method of using a laryngoscope guide including a guiding conduit for advancing an introducer. The method can be used to intubate a subject by positioning the laryngoscope guide in an airway; advancing the introducer in the conduit until an end of the introducer enters the glottis, while viewing images of the introducer end; removing the laryngoscope guide with the guide conduit from the introducer and from the airway; guiding a tube with the introducer until an end of the tube enters the glottis; and removing the introducer from the tube with the end of the tube remaining in the glottis, and in particular, in the trachea, to establish an airway. The guide and method can enable a healthcare professional to intubate a subject where neck mobility is an issue, where an airway is difficult, and / or where a subject is obese.
Owner:SPECTRUM HEALTH INNOVATIONS

TFT array substrate and display panel

The invention provides a TFT array substrate and a display panel. According to the TFT array substrate provided by the present invention, a first thin film transistor is disposed in each pixel, and the grid electrode of the first thin film transistor in the Nth row of pixels is electrically connected with the (N+1)th scanning line. The drain electrode is electrically connected with the Nth scanning line, the source electrode is connected with the negative voltage of the power supply, and therefore a scanning signal received by each pixel is independently pulled down in each pixel, thereby greatly shortening the falling time of the scanning signal and being beneficial to ensuring the display quality of the display panel.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD

Array substrate, display panel with array substrate and display device

The invention provides an array substrate. A plurality of scanning lines and a plurality of data lines are arranged in a display area of the array substrate, all the scanning lines are spaced from oneanother and extend along a first direction, all the data lines are mutually spaced and extend along a second direction, and all the scanning lines and all the data lines are insulated and crossed. Aplurality of patch cord units are also arranged in the display area, each patch cord unit comprises at least two patch cords connected in parallel, and all the patch cords are spaced from one anotherand extend along the second direction. Each scanning line corresponds to at least one patch cord unit, each scanning line is connected with all the patch cords in all the corresponding patch cord units, and each patch cord is used for inputting scanning signals to the connected scanning lines. According to the array substrate provided by the invention, the resistance of each patch cord unit is smaller, and the descending time of scanning signals can be greatly shortened, so that the charging rate of each sub-pixel electrode is improved, and the effect of displaying the image quality is furtherimproved. The invention further provides a display panel with the array substrate and a display device.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD

Cereal drier

The invention discloses a cereal drier and relates to the technical field of cereal processing equipment. The cereal drier provided by the invention comprises a drying outer barrel, a drying inner barrel and a material receiving barrel, wherein the drying inner barrel is rotatably connected in the drying outer barrel, the drying outer barrel is fixedly connected to the material receiving barrel, the drying outer barrel is of a barrel body structure opened up and down, a rotating shaft is arranged on the top of the drying inner barrel, the rotating shaft is fixedly connected to the output shaftof a motor through a coupling, a feed inlet is also formed in the top of the drying inner barrel, discharge holes are uniformly formed in the bottom of the drying inner barrel, a hot wind cavity is formed between the drying inner barrel and the drying outer barrel, drying holes communicating to the hot air cavity are formed in the side wall of the drying inner barrel, the hot air cavity is connected to a hot-air blower arranged on the outer wall of the drying outer barrel through a hot air pipe, a first inclined plate is arranged in the material receiving barrel, a first discharge port is formed in the end, inclining downward, of the first inclined plate, and a dust collecting device is arranged above the first discharge port. The cereal drier disclosed by the invention is high in dryingefficiency and good in drying effect and can meet the production needs.
Owner:湖南省吉娃米业有限公司

Husked rice separation slide sieve

The invention discloses a husked rice separation slide sieve. Only a single-layer separation slide sieve is adopted for improving the separating efficiency of husked rice, the husked rice separation slide sieve comprises a feeding box, wherein a feed port is formed in the lower part of the feeding box, an inclined bottom plate, a slide sieve body and a face plate are arranged below the feeding box in sequence, a husked rice passage is formed between the bottom plate and the slide sieve body, a husked rice separation passage is formed between the slide sieve body and the face plate, the slide sieve body adopts a reversed tooth sieve, the longitudinal section of the reversed tooth sieve in the length direction are reversed tooth-shaped, a plurality of air inlets are formed in the face plate, a cover lid is arranged on the outer side of the face plate, and an air intake pipe is connected to the cover lid.
Owner:CHONGQING LONGYUE FOOD

High-toughness corrosion-resistant wear-resistant ball and production process thereof

The invention provides a high-toughness corrosion-resistant wear-resistant ball and a production process thereof. The high-toughness corrosion-resistant wear-resistant ball comprises the following components of, by weight, .3-2.9% of C, 1.1-1.7% of Si, 1.2-1.9% of Mn, 2.5-3.8% of Ni, 4.5-8% of Cr, 0.4-1.1% of Mo, 0.2-0.7% of V, 0.1-0.3% of Cu, 0.05-0.2% of Y, 0.02-0.04% of P, 0.01-0.02% of S and the baclance Fe and inevitable impurities. The production process thereof mainly comprises the three following steps of smelting raw materials, spheroidizing and inoculation treatment and heat treatment. According to the high-toughness corrosion-resistant wear-resistant ball and the production process thereof, the components of the elements are reasonably configured, the optimized production process is coordinated, so that the prepared wear-resistant ball is high in strength, high in hardness, excellent in toughness and good in corrosion resistance.
Owner:NINGGUO ZHENGXING WEAR RESISTANT MATERIALS

Methods and Systems for Drawn Fused Filament Fabrication Printing

A drawn fused filament fabrication method of three-dimensional printing is disclosed in which the filament extruded is variable and not restricted to the diameter of the nozzle used for extrusion. This method composes three steps. The first is to extrude a small amount of material at a starting position. Next, the extruding head pulls the extruded material along while moving away from the starting position. During this time to material cools down and solidifies. As a result, a thin filament is formed. Third, once the extruding head moves to a destination, a small amount of material can be extruded and deposited to anchor this newly formed filament to a surface. The drawn fused filament fabrication method may be used to print three-dimensional parts having significant lower thickness than the diameter of the nozzle used to extrude the printing material.
Owner:UNIVERSITY OF MISSOURI +1

Cushion valve

The invention discloses a cushion valve which comprises a cushion valve body, an upper cover and a lower cover. The upper cover and the lower cover are arranged at the upper end and the lower end of the cushion valve body. The upper cover is thicker than the lower cover. An adjusting valve is arranged on one side of the upper cover and penetrates into the cushion valve body. An air outlet and an air inlet are formed in the cushion valve body and communicate with the interior of the cushion valve body. The air outlet and the cushion valve body are sealed through limiting sealing parts. The interior of the cushion valve body communicates with the interior of the upper cover. A piston is arranged in the upper cover. A push rod is arranged in the cushion valve body. The piston is connected with the push rod. The push rod is connected with the lower cover through a reset spring. By the adoption of the adjusting valve, the air inlet amount of the upper cover and the air pressure level of the air outlet can be adjusted, speed of closing or opening a vehicle door at the moment of ventilation can be decreased, air is discharged fast to shorten time for opening the vehicle door manually, the cushion valve can meet the requirements of people, and the situations that because the door closing speed is too high, people are injured and the vehicle door is damaged are avoided.
Owner:凤阳凤辰电子科技有限公司

Reaction device for preparing azamethiphos in fully sealed way

The invention provides a reaction device for preparing azamethiphos in a fully sealed way. The reaction device comprises a first reaction unit, a second reaction unit and a third reaction unit, wherein the first reaction unit comprises a cyclone kettle, a 3H-oxazolo[4,5-b]pyridin-2(3H)-ketone storage tank, an N, N-dimethylformamide storage tank, a paraformaldehyde storage tank and a sulfoxide chloride storage tank; the first reaction unit comprises a first powder-liquid mixing pump which comprises a first inlet and a second outlet; the 3H-oxazolo[4,5-b]pyridin-2(3H)-ketone storage tank, the N, N-dimethylformamide storage tank and the paraformaldehyde storage tank are communicated with the first inlet, and the first outlet is communicated with the cyclone kettle; and the cyclone kettle comprises a first body, and a first reaction chamber is formed in the hollow first body and is of an inverted conical structure. The reaction device provided by the invention can fundamentally put an end to the leakage of harmful gases, and is good for environmental protection.
Owner:NINGBO YUANLI CHEM

InGaN/GaN LED nanosecond pulse driving circuit

The invention discloses an InGaN / GaN LED nanosecond pulse driving circuit. Through a current pulse peak technology, a loop composed of Schottky diodes SBD1 and SBD2 and a capacitor C produces a current peak, and the rise time of light pulse is shortened by a few nanoseconds. Thus, the rise time of light pulse is shortened. A first inductor L1 is connected between the cathode of an LED and a bias power supply Vcc. In the phase of current pulse fall, an undershoot current is produced through a reverse current loop provided by the inductor. Thus, the fall time of light pulse is reduced, the LED goes out more quickly, and the fall time of light pulse is improved greatly. A high-speed field effect transistor switching circuit quickly charges the parasitic output capacitor of a main switch by increasing auxiliary switches, so that the closing time of the main switch is shortened, and the switching rate of field effect transistors is increased. The anode of the LED is connected with a DC bias voltage Vcc, so that an equivalent capacitor can be fully charged before the arrival of current pulse. Therefore, the switch-on delay of the LED is shortened effectively, and the transient response time of the LED is improved greatly.
Owner:SHAANXI NORMAL UNIV

Full-sealing process for preparing azamethiphos cleanly

The invention provides a full-sealing process for preparing azamethiphos cleanly. The process comprises the following steps: providing a reaction device; preparing a branch-chain chloro-product: introducing chlorine gas into a rotational flow kettle, which comprises a first body, wherein the first body is arranged in a hollow manner, so that a first reaction cavity with an inverted cone structure is formed; mixing raw materials such as oxazole [4,5-b] pyridine-2(3H) ketone, N, N-dimethylformamide, paraformaldehyde, sulfoxide chloride and the like, and injecting into the rotational flow kettle, so that the raw materials have a reaction in the first reaction cavity and the branch-chain chloro-product is obtained; preparing phosphorothioate in a second reaction unit; and preparing azamethiphos in a third reaction unit. According to the full-sealing process for preparing azamethiphos cleanly, azamethiphos can be prepared cleanly under a full-sealing environment.
Owner:NINGBO YUANLI CHEM

An ingan/gan LED nanosecond pulse drive circuit

The invention discloses an InGaN / GaN LED nanosecond pulse driving circuit. Using the current pulse peak value technology, the loop formed by Schottky diodes SBD1 and SBD2 and a capacitor C will generate a current peak value, thereby shortening the rise time of the light pulse by several times. nanoseconds, which shortens the rise time of the light pulse; the first inductor L1 is connected between the LED cathode and the bias power supply Vcc, and when the current pulse is falling, the reverse current loop provided by the inductor is used to generate an undershoot current. In this way, the falling time of the light pulse can be reduced to speed up the extinguishing of the LED and greatly improve the falling time of the light pulse; the switching circuit of the high-speed field effect tube mainly shortens the time of the main switch by adding an auxiliary switch to quickly charge the parasitic output capacitance of the main switch. The off time of the switch is used to increase the switching rate of the field effect tube; the anode of the LED is connected to the DC bias voltage Vcc, so that the equivalent capacitor can be fully charged before the current pulse arrives, thereby effectively shortening the LED conduction The delay can greatly improve the transient response time of the LED.
Owner:SHAANXI NORMAL UNIV

Keyboard scanning method and keyboard adopting same

A scanning method for a keyboard includes steps (A), (B), (C) and (D). In step (A), a controller is configured to disable each column line from a respective first resistor and to disable each row line from a respective second resistor, and to send a scan signal to a column line. In step (B), the controller is configured to enable one of the row lines with the respective second resistor, and to read a signal on the row line. In step (C), the controller is configured to repeat step (B) with another one of the row lines until all row lines have been read. In step (D), the controller is configured to repeat steps (A), (B), and (C) with another one of the column lines until all column lines have been scanned.
Owner:LITE ON ELECTRONICS (GUANGZHOU) LTD +1

Rotating disc type feed drying equipment

The invention discloses rotary disc type feed drying equipment, and belongs to the technical field of feed processing. Feed can be dispersed through a drying rotary drum, then slides down along the side wall of the drying rotary drum and can be dynamically rolled, the whole surface is exposed, and the contact effect between the feed and hot air is improved; after entering the drying rotary drum through the air inlet pipe, hot air is released through the air outlet holes in the side wall to directly dry the sliding feed, and meanwhile, the hot air can impact the feed contact balls in the air outlet holes to force the feed contact balls to extend outwards, so that the feed can be detained, the sliding time of the feed can be delayed, and the feed drying efficiency is improved. Meanwhile, the drying drum can make contact with the feed to absorb moisture, the drying efficiency of water on the feed is improved, the air inlet amount of hot air can be controlled according to the water content of the feed, and the air inlet amount is increased to push the drying drum to rotate, so that the feed is impacted on the horizontal plane, and dispersion of the caked feed is facilitated; and the feed drying effect and efficiency are obviously improved.
Owner:南通杰卡博工程机械有限公司

Shift register and gate drive circuit

The invention provides a shifting register and grid driving circuit adopting the same. The shifting register comprises an input signal selection circuit, an output circuit, a pull-down circuit and a voltage raising circuit. The input signal selection circuit is coupled to a node, a first signal source, a second signal source, a first input signal source and a second input signal source. The output circuit is coupled to the node, the output end of the shifting register and the first clock source. The pull-down circuit is coupled to the output end, the second clock source and a reference potential source. The voltage raising circuit is coupled to the node, the output end, the first signal source, the second signal source, the third signal source and the fourth signal source. The shifting register provided by the present invention can shorten the falling time of the pulses it provides.
Owner:AU OPTRONICS CORP

A kind of lactic acid bacteria preservative that improves the survival rate of liquid lactic acid bacteria at normal temperature and its application

The invention provides a lactobacillus preservative capable of increasing the survival rate of liquid lactobacilli at the room temperature and an application of the lactobacillus preservative. With adoption of a lactobacillus body and nutrient suspension technology and a sustained release technology as well as addition of cream, linoleic acid, lecithin, glycerol monostearate and a stabilizer to a medium and regulation of pH value, the storage period of the liquid lactobacilli with high live bacteria quantity is prolonged, the problem of rapid reduction of liquid lactobacilli with high live bacteria quantity due to reduction of the content of nutrients and storage at the normal temperature is solved, and the lactobacilli really play a role in preventing and treating diarrhea and regulating balance of the intestinal flora during use; the lactobacillus preservative as a green, safe and effective microecological agent is applied and popularized.
Owner:青岛云溯源健康科技有限公司

Reaction device for fully hermetically producing azamethiphos

The invention provides a reaction device for fully hermetically producing azamethiphos, which includes a first reaction unit, a second reaction unit and a third reaction unit, wherein the first reaction unit includes a rotational-flow kettle, an oxazole [4,5-b] pyridine-2(3H) ketone storage tank, an N,N-dimethylformamide storage tank, a paraformaldehyde storage tank and a thionyl chloride storage tank, wherein the first reaction unit includes a first powder-liquid mixing pump; the first powder-liquid mixing pump includes a first inlet and a first outlet; the oxazole [4,5-b] pyridine-2(3H) ketone storage tank, the N,N-dimethylformamide storage tank and the paraformaldehyde storage tank are communicated with the first inlet; the first outlet is communicated with the rotational-flow kettle; the rotational-flow kettle includes a first main body; the first main body is hollow and forms a first reaction chamber; and the first reaction chamber is an inverted cone structure. The reaction device provided by the invention radically avoids harmful gas leakage and facilitates the environmental protection.
Owner:NINGBO YUANLI CHEM

A reaction device for fully sealed preparation of picoline

The invention provides a reaction device for fully hermetically preparing azamethiphos, which includes a first reaction unit, a second reaction unit and a third reaction unit, wherein the first reaction unit includes a rotational-flow kettle, a oxazole [4,5-b] pyridine-2(3H) ketone storage tank, an N,N-dimethylformamide storage tank, a paraformaldehyde storage tank and a thionyl chloride storage tank, wherein the first reaction unit includes a first powder-liquid mixing pump; the first powder-liquid mixing pump includes a first inlet and a first outlet; the oxazole [4,5-b] pyridine-2(3H) ketone storage tank, the N,N-dimethylformamide storage tank and the paraformaldehyde storage tank are communicated with the first inlet; the first outlet is communicated with the rotational-flow kettle; the rotational-flow kettle includes a first main body; the first main body is hollow and forms a first reaction chamber; and the first reaction chamber adopts an inverted cone structure. The reaction device provided by the invention radically avoids harmful gas leakage and facilitates the environmental protection.
Owner:NINGBO YUANLI CHEM

Gate drive circuit and display panel

The present application discloses a gate drive circuit and a display panel. The gate drive circuit includes a plurality of cascaded gate drive units. The gate drive unit of the Nth stage adopts the same clock through the pull-down control module, the maintenance module and the pull-down module. The combined signal can quickly pull down the falling edge of the N-level scanning signal to the potential of the constant-voltage low-potential signal, effectively shortening the falling time of the N-level scanning signal from high potential to low potential.
Owner:WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD

A Technological Method for Shortening the Production Cycle of Large Steel Castings

The invention relates to a technology method for shortening the production period of a large-scale casting steel piece. The technology method for shortening the production period of the large-scale casting steel piece comprises the steps of after a casting piece is poured for three days, gradually removing part of sand box on the upper layer; measuring the temperature of a root part of a dead head, hoisting the casting piece out from a sand mold when the temperature is lower than 400 DEG C, air cooling, and then putting back into the sand mold; and shaking out after the measured box is lower than the corresponding temperature again, cooling the shake-out casting piece to the room temperature, then cleaning and shot blasting, cutting the dead head after preheating the casting piece, and after cutting the dead head, a water gap and patches, carrying out performance heat treatment on the casting piece. According to the technology method for shortening the production period of the large-scale casting steel piece provided by the invention, through accelerating the cooling speed after the casting piece is solidified, and by adopting the methods such as cleaning and shot blasting at roomtemperature, and canceling complete annealing, the technological process is simplified, and the production efficiency is improved, so that the aim of shortening the production period is achieved, andthe method has universal adaptability on carbon steel and low-alloy steel casting pieces.
Owner:LIAONING FU-AN HEAVY INDUSTRY CO LTD
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