31results about How to "Eliminate surface stress" patented technology

The invention discloses a wood drying process. The wood drying process comprises the steps of 1, preheating; 2, high-temperature and high-humidity treatment; 3, drying; 4, maintenance. When the wood drying process is adopted for drying wood, the surface stress and internal stress of wood can be eliminated, surface cracking or internal cracking of wood can be prevented, the original quality of wood is maintained, defects such as air shrinkage, bending, crinkling and deformation do not occur easily, the rate of wood damage caused by improper drying is reduced greatly, and meanwhile, energy is saved and drying time is shortened.

The invention discloses a heat treatment process for an iron core of a motor and belongs to the technical field of the manufacture of motors. The process comprises the following steps of: (1) raising the temperature of an annealing furnace, and introducing DX gas into the annealing furnace after the temperature of an annealing zone of the annealing furnace is raised to 690 to 730 DEG C; (2) placing a motor iron core to be treated on a conveying belt of the annealing furnace for heating treatment; (3) introducing saturated steam into a bluing zone of the annealing furnace to ensure that the iron core which is subjected to heating treatment and enters the bluing zone is blued; and (4) cooling the iron core which is blued, and taking out. By the heat treatment process, the surface stress of iron core sheets is eliminated, the isotropy and residual magnetism are eliminated, the input power of the iron core is reduced, a damaged oxide film is repaired through bluing treatment, and the insulation between the sheets is increased; and C in an unstable valence state in a sheet material is displaced through reducing gas, so that the structural compactness of the material is improved, the stability of the material is increased, and the efficiency of the iron core is improved.

The invention relates to a controlled cooling and controlled rolling method for control over bearing steel wire network carbide. The controlled cooling and controlled rolling method is characterized by comprising the steps that a bar is quickly rolled into a wire with the specified specification to be subjected to spinning, scattered rolls are made, the final rolling temperature is controlled to be 780- 880 DEG C; the spitting temperature is controlled to be 750-850 DEG C; the continuous scattered rolls are subjected to on-line controlled cooling through EDC water bath isothermal quenching cooling, the cooling speed is controlled to be 2.0- 10 DEG C / s, and the final cooling temperature is controlled to be 620-630 DEG C; cover-adding slow cooling is conducted after EDC water bath isothermalquenching cooling, and the temperature when the scattered rolls are taken out from a cover is controlled to be 400-500 DEG C; and the rolls are collected after slow cooling, and air cooling is conducted to the room temperature. The disc rolls are subjected to controlled cooling through a mode of EDC water bath isothermal quenching cooling and cover-adding slow cooling, precipitation of the carbide in the cooling process can be effectively inhibited, a non-equilibrium microstructure is obtained, the small-strip-shaped or hemispheric carbide is formed, and finally, the network carbide is controlled.

The invention provides a recycling method of toughened waste glass. The recycling method comprises the following steps: A, preheating; B, ion exchange of mixed molten salt: the preheated glass is subjected to ion exchange by the mixed molten salt consisting of lithium nitrate and sodium nitrate for 4 hours or longer at 380-480 DEG C; C, water cleaning: molten salt of lithium nitrate and sodium nitrate on the surface of the glass after ion exchange is removed by water washing; D, annealing at high temperature; E, re-toughening: chemical toughening is performed on the annealed glass again aftersecondary processing and / or cutting, and a recycled glass product is obtained. According to the recycling method, surface stress of the glass toughened primarily can be eliminated by the aid of the ion exchange action of sodium nitrate and lithium nitrate in the mixed molten salt, so that the glass annealed at high temperature can be directly processed secondarily and / or cut without cracking, andthe size of the expanded glass after original high-temperature annealing and re-toughening is effectively controlled.

The invention relates to a method for preparing electrocasting copper-gold phase samples and displaying structure, belonging to the technical field of preparation of gold phase samples. The method comprises the following steps: the electrocasting copper sample is processed by rough grinding to 1000silicon carbide waterproof abrasive paper, then polishing is carried out, the surface state is observed under a microscope, the surface scratch is determined along one direction and electrolytic polishing is carried out to the polished electrocasting copper sample; the composition of the electrolyte is H3PO4 solution with the volume fraction of 80 percent to 90 percent; the temperature is 15 to 20 DEG C, the current density is 6 to 8A / dm, the voltage is 1.5 to 1.8 V, and the processing time is 10 to 15s; then the sample is immersed or wiped for erosion; and the formulation of an erodent comprises FeCl3, HCl and H2O with the proportion of 1:2:20. The method effectively solves the problem of the electrocasting copper caused by soft texture, can basically get rid of the surface stress generated in the polishing process and clearly display electrocasting copper-gold phase microscopic structure.

The invention discloses a machining method for a spherical surface roller pin free of edge angles. The method includes the following steps of A roll polishing, B heat treating and C modified line machining and further includes the following step of edge angle removal machining, wherein after roll polishing in the step A, an arc lantern-shaped rolling barrel is manufactured according to the size and the shape of a roller pin, the rolling barrel is horizontally arranged on a support with an adjustable dip angle, the roller pin after roll polishing is thrown into a barrel body of the rolling barrel through a throwing opening, the two ends of a roller pin blank make contact with the barrel wall in the barrel body, the rolling barrel rotates in the circumferential direction around the axis of the barrel body through an external power source, and in the rotating process, the roller pin blank is grinded in a 360-degree rolling-polishing mode along the barrel wall in the barrel body, so that the edge angles at the two ends of the roller pin are machined to be arc angles. The method solves the problem that the edge angles exist in the connecting positions of the two ends of the outer side wall and the semicircular ends of the roller pin, and the roughness of the semicircular ends at the two ends of the roller pin is small.

This invention provides a method for eliminating the surface stress of a silicon wafer comprising forming one or more anti-stress groove(s) on the surface of the silicon wafer. These anti-stress grooves can reduce or eliminate the surface stress of silicon wafer effectively to avoid the formation of slip lines and dislocation arrangements, which may induce the p-n junction to conduct or the leakage current to increase. The process is highly efficient and low in cost. It is simple to manage and does not require additional equipment beyond that already used for processing of silicon wafers.

The invention provides an EBSD sample making method. The method includes: sample making, wherein a preset-size test is made from sample raw-material, and a to-be-tested surface of the test sample is polished; and heat processing, wherein the test sample after sample making completion is placed in vacuum airtight equipment capable of temperature control, heat processing is carried out according topreset technology, and the sample is used for an EBSD test after heat processing completion. Through the method, a sample making process and time can be shortened, sample making costs can be reduced,sample making efficiency can be improved, calibration rates of IPF graphs in EBSD tests can be significantly improved at the same time, and a highest calibration rate can reach 99%.

The invention belongs to the technical field of car parts and relates to a preparation method of a car door handle. The preparation method comprises the following steps that (1) a PC and ABS compositeis injected into a mould cavity so that a car door handle blank is obtained; (2) the car door handle blank is arranged in a bisphenol A type epoxy resin solution and then taken out to be put in a plasma reaction device and vacuumized, gas is supplied into the plasma reaction device, and surface modification treatment is carried out so that a surface modified blank is obtained; and (3) the surfacemodified blank is subjected to primary electronickelling, baking, then secondary electronickelling and drying, so that the car door handle is obtained.

The invention relates to a dead knife for a textile shearing machine. The dead knife comprises a cutting edge and a blade body, wherein the rigidity of the cutting edge is different from that of the blade body; the cutting edge comprises a first cutting edge, a second cutting edge and a third cutting edge; the first cutting edge, the second cutting edge, the third cutting edge and the blade body are connected in sequence and are molded integrally; each of the first cutting edge and the second cutting edge is of an inclined plane structure; each of the third cutting edge and the blade body is of a plane structure, and the thicknesses of the first cutting edge, the second cutting edge, the third cutting edge and the blade body are the same; a cutting edge included angle of the first cuttingedge is alpha and the cutting edge included angle of the second cutting edge is beta; the alpha and the beta are acute angles and the alpha is greater than the beta. According to a machining method provided by the invention, the rigidity of the cutting edge of the dead knife is distinguished from the rigidity of the blade body, and the straightness and the parallelism degree of the dead knife keepconsistent; the service life of the dead knife can be prolonged, and the smoothness in a matching and adjusting process of the dead knife and a round knife is also ensured; the working efficiency isgreatly improved.

The invention relates to a polishing process for a back plate in a target material assembly. The polishing process comprises the steps that first mechanical polishing and second mechanical polishing are sequentially conducted on the target material back plate, wherein an abrasive belt used in first mechanical polishing is a 600 # non-woven fabric ring belt; and an abrasive belt used in second mechanical polishing is a 240 # non-woven fabric ring belt. According to the polishing process for the back plate in the target material assembly provided by the invention, through the design of the polishing process, different abrasive belts and specific polishing sequences are adopted to remove surface dirt, and meanwhile, the service life of the back plate is prolonged.

The invention provides a method for reducing stress of tempered glass and a method for recycling defective products of glass and relates to the field of production of touch screens. The method for reducing stress of tempered glass comprises the following steps: (A), preheating: preheating lithium silicate tempered glass for 2-5 hours at 290-350 DEG C; (B) ion exchange: placing the preheated tempered glass in mixed fused salt of sodium nitrate and lithium nitrate and carrying out ion exchange for 10-120 minutes at 382-450 DEG C, wherein the weight percentage of sodium nitrate in the mixed fusedsalt is 71-79%; the weight percentage of lithium nitrate in the mixed fused salt is 21-29%. The method for reducing the stress of the tempered glass can be used for relieving the problem that a technology for eliminating the stress of the lithium nitrate tempered glass is lacked in the prior art; the purpose of reducing or eliminating the stress of the lithium nitrate tempered glass is achieved.

The invention discloses a production method and a product of an oblong flat-wire stainless steel profiled bar. The production method comprises the following steps of 1), first-time coarse drawing; 2), second-time coarse drawing; 3), immersion lubrication; 4), the preparation of an oblong flat-wire hole die; and 5), fine drawing: making one end of a bus of which the immersion lubrication procedure is completed penetrate into a concave die, starting a wire drawing machine to carry out a fine-drawing forming procedure, so as to make and obtain the oblong stainless steel profiled bar. The production method provided by the invention is succinct in procedures and high in efficiency; the surface defect of the bus is hereby removed first through the first-time coarse drawing; afterwards, the surface stress of the bus is hereby relieved again through the second-time coarse drawing; the surface texture of the bus is guaranteed to be stable without rupturing during the fine drawing; subsequently, the bus is immersed in a lubricant, so that a protective layer is formed on the surface of the bus and the bus plays a lubrication role between the bus and the die during the fine drawing; the friction is prevented from causing a scratch; finally, through the fine drawing, the oblong stainless steel profiled bar is made and obtained; the quality of the product is effectively guaranteed; and the improvement of the competitive power of an enterprise is facilitated.

The invention provides a heat treatment process for electric power steel, which includes the following steps: (1) raising the temperature of the annealing furnace, and after the temperature of the annealing zone of the annealing furnace rises to 690-730°C, injecting DX gas into the annealing furnace; ( 2) Put the power steel to be processed on the conveyor belt of the annealing furnace for heat treatment; (3) Pass saturated steam into the bluening zone of the annealing furnace to blueize the iron core that enters the bluening zone after heating treatment; ( 4) After the iron core is blued, it is quenched and cooled. During the quenching and cooling process, an appropriate amount of methanol or kerosene should always be dripped into the furnace to prevent oxidative decarburization; (5) After quenching, low-temperature tempering deal with. The steel material after the heat treatment of the invention has high strength, high yield strength, low crack sensitivity, good corrosion resistance, good toughness, and can recover naturally after bending under force.

The invention discloses a production method for a hexagonal stainless steel profiled bar and a product thereof. The production method comprises the following steps that (1), first roughing extracting is conducted; (2), second roughing extracting is conducted; (3), soaking and lubricating are conducted; (4), an hexagonal eye model is prepared; and (5), fine extracting is conducted, specifically, one end of a soaked and lubricated busbar is penetrated into a concave die, a wire drawing machine is started to conduct the fine extracting forming working procedure, and the hexagonal stainless steel profiled bar is prepared. The production method is concise in working procedure and high in efficiency. Firstly, through first roughing extracting, the surface defect of the busbar is removed; then, through second roughing extracting, and the surface stress of the busbar is eliminated, so that it is guaranteed that the surface structure of the busbar is stable and does not fracture; the busbar is soaked into a lubricating agent to form a protective layer on the surface of the busbar, the lubricating effect is achieved between the die and the busbar when fine extracting machining is conducted, so that scratching caused by friction is avoided; and finally, through fine extracting, the hexagonal stainless steel profiled bar is prepared, the quality of the product is effectively guaranteed, and the production method is favorable for improving enterprise competitiveness.

The invention discloses a heat treatment process for an iron core of a motor and belongs to the technical field of the manufacture of motors. The process comprises the following steps of: (1) raising the temperature of an annealing furnace, and introducing DX gas into the annealing furnace after the temperature of an annealing zone of the annealing furnace is raised to 690 to 730 DEG C; (2) placing a motor iron core to be treated on a conveying belt of the annealing furnace for heating treatment; (3) introducing saturated steam into a bluing zone of the annealing furnace to ensure that the iron core which is subjected to heating treatment and enters the bluing zone is blued; and (4) cooling the iron core which is blued, and taking out. By the heat treatment process, the surface stress of iron core sheets is eliminated, the isotropy and residual magnetism are eliminated, the input power of the iron core is reduced, a damaged oxide film is repaired through bluing treatment, and the insulation between the sheets is increased; and C in an unstable valence state in a sheet material is displaced through reducing gas, so that the structural compactness of the material is improved, the stability of the material is increased, and the efficiency of the iron core is improved.

The invention discloses a construction hoist standard knot coating production line. The construction hoist standard knot coating production line comprises a workpiece feeding area, a workpiece discharging area, a conveying track, a shot blasting machine, a shot cleaning chamber, a spraying room, a curing room and a cooling station, a conveying track sequentially penetrates through the workpiece feeding area, the shot blasting machine, the shot cleaning chamber, the spraying room, the curing room, the cooling station and the workpiece discharging area to form a continuous operation production line, a plurality of shot blasting devices with opposite openings are arranged on the inner wall of the shot blasting chamber in the shot blasting machine, the shot blasting chamber communicates with the shot cleaning chamber, a plurality of shot cleaning guns are arranged in the shot cleaning chamber, a recovery device inclining from the shot cleaning chamber to the shot blasting machine is arranged at the bottom of the shot cleaning chamber, so that cleaned and fallen balls fall back into the shot blasting machine, the top of the shot blasting chamber and the top of the shot cleaning chamber both communicate with a filter cartridge dust remover, a plurality of movable spray guns are arranged on two sides of the conveying track in the spraying room, and a heating system is arranged in the curing room and used for heating passing standard knots. According to a semi-automatic production line mode, less labor is needed, and the problem of high labor cost is solved.

The invention relates to a processing process and a coating device for a colored steel strip. The processing process for the colored steel strip comprises the following steps: continuously obtaining ato-be-processed steel strip; cleaning surface dirt of the to-be-processed steel strip in a hot water dirt-removal process; blowing gas to the steel strip with surface dirt cleaned in a gas-blowing process; heating and drying the cooled steel strip in a heating drying process; coating paint on at least one surface of the dried steel strip in a paint coating process; and drying and curing the painton the steel strip in a baking process; cooling the steel strip with paint dried in a cooling rolling process, and rolling and retracting the cooled steels trip. The gas-blowing process can be introduced to reduce the temperature of the steel strip, so that surface stress of the steel strip is favorably eliminated; and gas is adhered on the surface of the steel strip, so that oxygen content of the steel strip surface is favorably reduced, and therefore, the steel strip is not liable to oxidize in a follow-up heating drying process, and performance of the steel strip is improved.

A method for preparing a thermoplastic soft polyvinyl chloride adhesive tape, at least including a preparation process for instant quenching and hardening to shape and a preparation process for using a pressurized air-dispelling coiler to wind up a finished polyvinyl chloride soft adhesive tape; wherein, the instant The purpose of the hardening and shaping preparation process is to keep the surface quality of the PVC soft adhesive tape free of flow marks and the haze is consistent, and the purpose of using the pressurized air-driven coiler is to ensure that the PVC The surface of the soft adhesive tape is flat and free of bubbles and dents. Even if the PVC soft adhesive tape is rolled and stored, the upper surface and the lower bottom surface in the rolled state are in contact for a long time, and the light fog on the upper surface and the lower bottom surface The degree is still consistent, and it is suitable for making a double-sided high-gloss polyvinyl chloride soft adhesive tape without flow marks.

The invention relates to a method for improving the surface quality of a plastic metal electron back scattering diffraction sample. The method comprises the following steps of sample preparation, grinding, mechanical polishing, electrolytic polishing and ion etching. The method has the advantages that residual traces of sample preparation on the surface of the sample can be eliminated due to polishing treatment; mechanical polishing treatment can further eliminate abrasive paper polishing residual scratches on the surface; the stress layer on the surface of the sample can be removed through electrolytic polishing and ion etching treatment, so that the characterization quality of electron backscatter diffraction is improved, the surface quality of the sample is improved, the surface stresslayer is reduced, the dissolvable rate of the sample is improved, and an electron backscatter diffraction result with higher quality is obtained.

The invention provides a method for reducing the stress of tempered glass and a method for recycling defective glass products, and relates to the field of touch screen production. The method for reducing the stress of tempered glass includes the following steps: A) preheating: placing the lithium silicate tempered glass in a Preheating at 290-350°C for 2-5h; B) ion exchange: placing the preheated tempered glass in a mixed molten salt of sodium nitrate and lithium nitrate, and ion-exchanging at 382-450°C for 10-120min, wherein, In the mixed molten salt, the weight percent of the sodium nitrate is 71-79%, and the weight percent of the lithium nitrate is 21-29%. Using the method for reducing the stress of the strengthened glass can alleviate the lack of a technical problem in the prior art that is suitable for eliminating the stress of the lithium silicate strengthened glass, and achieve the purpose of reducing or eliminating the stress of the lithium silicate strengthened glass.

The invention discloses a heat treatment process of a stator iron core for an air conditioner, and relates to the technical field of heat treatment. The heat treatment process comprises the followingsteps of oil firing, annealing, slow cooling and blueing. According to the heat treatment process, the stator iron core is subjected to heat treatment, the surface stress of the stator iron core can be eliminated well, the stability and compactness of a material can be improved, the strength of the material can be improved, the magnetic performance can be restored and improved, and excellent rustprotection and corrosion resistance performance can be obtained.

The invention provides an EBSD sample making method. The method includes: sample making, wherein a preset-size test is made from sample raw-material, and a to-be-tested surface of the test sample is polished; and heat processing, wherein the test sample after sample making completion is placed in vacuum airtight equipment capable of temperature control, heat processing is carried out according topreset technology, and the sample is used for an EBSD test after heat processing completion. Through the method, a sample making process and time can be shortened, sample making costs can be reduced,sample making efficiency can be improved, calibration rates of IPF graphs in EBSD tests can be significantly improved at the same time, and a highest calibration rate can reach 99%.

The invention relates to a preparation method and application of a silicon carbide composite material for repairing a superhard material of heavy equipment in a thermal power plant, a silicon carbide resin composite material is obtained by vacuum casting, and an inhibitor is doped into the silicon carbide resin material to improve the fragility of a resin composition when the material is used for repairing a surface wear part of the heavy equipment. Meanwhile, compared with the prior art, the repairing carbon carbide resin material also has excellent wear resistance and bonding performance, and cracks, caused by later deformation and thermal expansion and cold contraction, at a heterogeneous interface are prevented. The repair process is simple, the service life of the heavy equipment is prolonged, meanwhile, the surface of the wear-resistant repair coating is smooth, and the wear resistance and the corrosion resistance of the wear-resistant repair coating reach corresponding working standards.

The invention discloses a production method for a U-shaped stainless steel profiled bar and a product of the production method. The production method includes the following steps that firstly, the first time of rough drawing is conducted; secondly, the second time of rough drawing is conducted; thirdly, soaking and lubricating are conducted; fourthly, a U-shaped eye die is prepared; and fifthly, precise drawing is conducted, wherein one end of a busbar obtained after the soaking and lubricating process penetrates into the U-shaped die, a wire drawing machine is started for conducting the precise drawing forming process, and the U-shaped stainless steel profiled bar is prepared. The processes of the production method are simple, and efficiency is high; surface defects of the busbar are removed through the first time of rough drawing so that the surface of the busbar can be smooth preliminarily; then surface stress of the busbar is eliminated through the second time of rough drawing so that it is ensured that the surface organization of the busbar is stable and does not crack during precise drawing; then the busbar is soaked into a lubricating agent so that a protection layer can be formed on the surface of the busbar, a lubricating effect is achieved between the busbar and the die when the busbar is subjected to precise drawing machining, and scratches caused by friction are avoided; and finally, the stainless steel profiled bar is prepared through precise drawing, the quality product is effectively ensured, and the enterprise competitiveness is better improved.

The invention discloses a treatment method of a high-temperature alloy EBSD test sample. The method comprises the following steps: 1, mechanical grinding: sequentially carrying out coarse grinding, fine grinding and mechanical polishing on the high-temperature alloy sample; 2, carrying out metallographic photographing and picture splicing after chemical corrosion, determining the position of a defect, carrying out marking treatment, and calculating to obtain an average value of dendritic crystal spacing in the test surface; and thirdly, fine grinding and mechanical polishing are repeated in sequence to remove the acid corrosion layer, then stress removal corrosion is conducted, and the high-temperature alloy EBSD test sample is obtained. According to the method, the high-temperature alloy sample is mechanically polished and then subjected to chemical corrosion, the average value of the dendritic crystal spacing in the test surface of the sample is obtained to determine the EBSD test step length, then an acid corrosion layer is removed, stress relief corrosion is conducted, and the surface stress of the high-temperature alloy sample is effectively removed through the strong oxidizing property of corrosive liquid; the problems that high-temperature alloy EBSD test sample preparation is difficult, the working procedure is complex and the period is long are solved, and the method has the advantages of being simple, practical and efficient.

The invention belongs to the technical field of car parts and relates to a preparation method of a car door handle. The preparation method comprises the following steps that (1) a PC and ABS compositeis injected into a mould cavity so that a car door handle blank is obtained; (2) the car door handle blank is arranged in a bisphenol A type epoxy resin solution and then taken out to be put in a plasma reaction device and vacuumized, gas is supplied into the plasma reaction device, and surface modification treatment is carried out so that a surface modified blank is obtained; and (3) the surfacemodified blank is subjected to primary electronickelling, baking, then secondary electronickelling and drying, so that the car door handle is obtained.

The invention discloses a direct forming manufacturing method of a metal-based multilayer / gradient composite board and a process unit of the direct forming manufacturing method. Scale, corrosion materials and other impurities on the joint surface of a base board are removed through chemical cleaning, the cleaned surface is subjected to gradient power electromagnetic induction heating or laser bombardment surface treatment, all phases near the joint surface are fully dissolved, a solid solution is enhanced, toughness and corrosion resistance are improved, the surface stress of the board is eliminated, and surface laser treatment is conducted to improve the binding property of a composite layer; raw materials of the composite layer are added and injected through powder laying, a high-energy heat source is adopted for irradiation or induction heating to melt powder, metallurgical bonding is formed between the composite layer and a base, and control over the final shape of a cold / hot-rolled board is conducted. The obtained multilayer / gradient composite board is compact in surface structure, bonding between the composite layer and the base and between layers is good, and the interlayer bonding performance of the composite board is remarkably improved. The process is high in flexibility, and the production period of the metal-based composite board can be greatly shortened after the process is combined with an existing continuous casting technology.