39results about How to "Uniform alloying" patented technology

The invention discloses hull structural steel adapting to high heat input welding, which comprises the following chemical components in percentage by mass: 0.06 to 0.14 percent of C, 0.10 to 0.50 percent of Si, 0.80 to 1.80 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.008 percent of S, 0.020 to 0.050 percent of Nb, 0.006 to 0.030 percent of Ti, 0.0030 to 0.0100 percent of N, 0.015 to 0.045 percent of Al, 0.03 to 0.10 percent of V and the balance of Fe and inevitable impurities. The hull structural steel has the process characteristics that: the Ti is conveyed in a mode of steel wires formed by wrapping alloy powder by steel belts, and the addition process of the Ti is synchronous with the casting process, so that the alloying is more uniform, generated TiN mass points are finer and more dispersed, and the capacity of inhibiting grain growth is higher; and the production process is simple and convenient, and the method is suitable for batch production. When steel plates produced by the smelting method are subjected to high heat input welding under the condition of more than 50 kJ / cm, the toughness of welding heat affected zones is high.

The invention relates to the preparation of titanium alloy, more specifically an Al-Nb-Ta intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 19-28%, Ta 23-27%, and balancing Nb. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Nb2O5, the charged mixture includes, Ta2O5 0.383-0.42kg, Al 0.75-0.913kg, CaF2 0.15-0.20kg, KCLO3 0.30-0.40kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention relates to the preparation of titanium alloy, more specifically an Al-Ti-Nb intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 2-10%, Si 3-30%, and balancing Nb. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Nb2O5, the charged mixture includes, TiO2 0.25-0.66kg, Al 0.115-0.46kg, CaF2 0.05-0.10kg, KclO3 0.07-0.12 kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention provides a powder metallurgy method for preparing superfine crystalline alloy by use of a micro-nano laminated sheet. The method comprises the steps of pre-preparing a micro-nano laminated matrix with preferred orientation and alloying element powder, mixing, and carrying out densification and sintering to form an ingot blank with a laminated structure, wherein the thickness of the alloying element powder is hundreds of nanometers, interlaminated interdiffusion is facilitated, alloying uniformity is realized, a texture formed by laminated superfine crystalline grains is obtained through further deformation processing, dislocation movement inside the crystalline grains is facilitated, and good plasticity is kept under a condition that the superfine crystalline strengthening and alloying strengthening mechanisms are brought into full play. The method saves time and energy, has low cost and wide application range, can be used for preparing bulked alloy material and has large-scale application potential, and the performances of the prepared alloy material are remarkably improved compared with the alloy material prepared by the conventional mechanical alloying method.

The invention relates to the preparation of titanium alloy, more specifically an Al-Nb intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 15-55%, and balancing Nb. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Nb2O5, the charged mixture includes, Al 0.423-1.07kg, CaF2 0.07-0.16kg, KCLO3 0.065-0.28kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention relates to the preparation of titanium alloy, more specifically an Al-Mo-V-Fe intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 5.5-17.2%, V 35-39%, Fe 3.8-5.5%, and balancing Mo. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of MoO3, the charged mixture includes, V2O3 0.879-0.979kg, Fe 0.047-0.069%, Al 0.69-1.457kg, CaF2 0.05-0.4kg, KCLO3 0.14-0.20%, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention discloses a six-element intermediate alloy for preparation of a high-strength titanium alloy. The six-element intermediate alloy comprises, by weight, 19-27% of Al, 20-25% of Mo, 20-25% of V, 8-16% of Cr, 0.8-3% of Fe and the balance Ti. The invention also discloses a preparation method of the six-element intermediate alloy for preparation of a high-strength titanium alloy. The high-strength high-toughness titanium alloy prepared from the six-element intermediate alloy has high strength and good plasticity, can substantially reduce hidden trouble caused by incomplete melting of high-melting point elements such as Mo, V and Cr in melting and ingot casting, improves ingot casting purity and component uniformity and prevents quality defects caused by high density inclusion and beta spots.

The invention relates to the preparation of titanium alloy, more specifically an V-Al-Sn-Cr intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 5.5-13.5%, Sn 11-14%, Cr 11-14%, and balancing V. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, calculated based on 1kg of V2O5, the charged mixture includes, Al 0.51-0.758kg, SnO2 0.136-0.148 kg, CrO3 0.23-0.275kg, CaF2 0.2-0.3kg, furnace slag 0.25-0.35kg (produced during vanadium-chrome-aluminum alloy smelting), the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention relates to the preparation of titanium alloy, more specifically an Al-Mo-Cr-Fe-Si intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 11.4-35%, Cr 20-28%, Fe 6-10%, Si 4.0-5.6%, and balancing Mo. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of MoO3, the charged mixture includes, CrO3 0.71-0.99kg, Fe 0.20-0.33kg, Si 0.046-0.065kg, Al 0.663-1.92kg, CaF2 0.05-0.4kg, the raw material shoving temperature being 30-60 deg. C.

The invention relates to the preparation of titanium alloy, more specifically an Al-Mo-Si intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Mo 38-48%, Si 3.5-4.5%, and balancing Al. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Al, the charged mixture includes, industrial Si 0.034-0.044kg, MoO3 0.781-0.935kg, CaF2 0.36-0.42kg, KCLO3 0.149-0.174kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention relates to the preparation of titanium alloy, more specifically an V-Al-Cr-Mo intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 10%, Mo 22%, Cr 30%, and balancing V. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, calculated based on 1kg of V2O5, the charged mixture includes, CrO3 0.808-1.64kg, MoO3 0.136-0.42kg, Al 0.958-2.87kg, CaF2 0.03-0.08kg, furnace slag 0-0.20kg (produced during vanadium-chrome-aluminum alloy smelting), the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention relates to a production method for low-apparent density brass powder. The production method comprises the steps that (1) an electrolytic copper powder finished product and zinc powder are evenly mixed; (2) after reducing atmosphere is led into materials obtained after mixing in the step (1), heating is carried out, and alloy powder is obtained; and (3) the alloy powder obtained in the step (2) is crushed and screened, obtained powder is added into an antioxidant to be evenly mixed, and brass powder is obtained. The production method has the beneficial effects that through mechanical mixing of the zinc powder and the electrolytic copper powder, even mixing can be guaranteed to a large extent, and the follow-up even alloying is further guaranteed; a diffusion-alloying technology is adopted, and it can be guaranteed that the content of zinc in the alloy powder is stable and easy to control; and the cathode copper powder with different low-apparent densities and different technological conditions are selected, the apparent density of the alloying powder can be manually controlled, and requirements of different industries are met.

The invention discloses a multi-electrode electroslag remelting device and an electroslag remelting process for high-nitrogen austenitic stainless steel, belongs to the technical field of electroslagremelting, and solves the technical problems that high-nitrogen austenitic stainless steel electroslag remelting equipment is expensive and the operation process is tedious. Nitriding alloys, low-carbon steel, manganese steel and other alloy materials with different elements and different contents are adopted, a plurality of electrode bars with the same length and different diameters are preparedin combination with calculation of the component proportion and the mass fraction of an electroslag ingot, and electroslag remelting of the high-nitrogen austenitic stainless steel is conducted. According to the multi-electrode electroslag remelting device and an electroslag remelting process, alloy elements of different electrode bars can enter a molten pool behind an electroslag layer simultaneously in a molten state according to a certain proportion in a normal pressure or high pressure state, and the components of the alloy elements of the molten pool at different heights before solidification are uniform; and meanwhile, alloying of the nitrogen element is stable in the solidification process, escape and segregation of nitrogen are less, the high content and homogenization of nitrogenare improved to a great extent, and the use performance of the high-nitrogen austenitic stainless steel electroslag steel ingot is effectively improved.

The invention relates to a ternary alloy for improving the titanium alloy ingredient homogeneity and a preparing method and application of the ternary alloy. A ternary intermediate alloy for improving the TC11 titanium alloy ingredient homogeneity is provided, and is basically composed of 5%-6% of Si, 55%-60% of Mo and the balance Al. Meanwhile, a preparing method and application of the ternary intermediate alloy are further provided. The ternary intermediate alloy is suitable for serving as a raw material of a high-strength high-temperature titanium alloy TC11; compared with other ternary alloys, the weight percentage of the Si is improved, the ingredient scope of the high-melting-point element Mo is shrunk, and therefore the smelting process of the ternary alloy is controllable, smelted cast condition blocks are better in crushing performance, powder-like products with the granularity smaller than or equal to 1 mm can be obtained, the ingredient homogeneity of the main elements including Si, Mo and Al in the TC11 alloy can be effectively improved, the probability that the high-melting-point element Mo forms high density inclusion segregation defects in the cast ingot smelting process is reduced, and the ingredient homogeneity of TC11 titanium alloy cast ingots and titanium materials is guaranteed.

The invention belongs to the field of metallurgy of iron and steel, in particular relates to a method for alloying vanadium in molten steel by using ferrovanadium fine powder in an RH station. The method solves the technical problem that fine powder containing vanadium is difficult to be utilized effectively. The invention aims to provide a method for alloying molten steel by using FeV50 fine powder with the granularity of 5-15 millimeters in an RH molten steel refining station. The method not only has no effect on a steel making mission and a production organization, but also ensures that the FeV50 fine powder resource with the granularity of 5-15 millimeters can be fully utilized. The method has the characteristics of simple operation, easy control, high yield of metal vanadium, and the like. The invention provides a new selection for fully and effectively utilizing the vanadium resource and reducing the production cost in the steel making process.

The invention relates to the preparation of titanium alloy, more specifically an Al-Mo-Sn-Si intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Mo 24-32%, Sn 15.5-23.5%, Si 1.8-3.2%, and balancing Al. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Al, the charged mixture includes, MoO3 0.653-0.806kg, Sn 0.287-0.368kg, Si 0.012-0.027 kg, CaF2 0.13-0.286kg, KCLO3 0.11-0.193kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The present invention relates to the preparation of titanium alloys, in particular to an aluminum-molybdenum-niobium-silicon master alloy used for the preparation of titanium alloys and a preparation method thereof. The alloy composition by weight percentage is: Al 8-12%, Nb 14-16%, Si 0.8 ~ 1.0%, Mo is the balance; the preparation process is: adopt the ignition smelting method outside the furnace, operate according to the conventional steps, the raw material drying temperature is 70 ~ 80 ℃, and the drying time is not less than 24 hours; the weight of ingredients is composed of 1kg MoO 3 Count: Nb 2 o 5 0.373~0.43kg, Al 0.763~1.14kg, Si0.010~0.013kg, MoO 2 1kg, CaF 2 0.05~0.415kg; the furnace temperature of raw materials is 30~60℃, the reaction is stable, and the alloy is formed well. The invention has the advantages of convenient preparation of titanium alloy, low cost and uniform alloying; the invention has good oxidation resistance, is easy to store and transport, and is easy to break.

A high specific surface area transition metal powder and a preparation method thereof belong to the field of metal powder smelting and processing. The method uses transition metal powder as a raw material, metal nickel powder or electrodeposited nickel as an alloying nickel source, and completes the alloying process in a molten salt. The reaction product is removed from the molten salt, cooled, ultrasonically washed and dried to obtain alloy powder. The process of dealloying nickel in the alloy powder is completed by pickling method or electrochemical anodizing method, ultrasonic cleaning and drying with water, and finally the synthesis process of transition metal powder with high specific surface area is realized. The prepared high specific surface area transition metal powder has a specific surface area of ​​0.5-10m 2 / g. This method uses the alloying-dealloying process to adjust the surface and internal structure of the transition metal at the atomic level to achieve the purpose of regulating the specific surface area of ​​the metal powder.

The invention discloses a preparation method of a nano-composite (Ti3Mo3Zr2Sn25Nb)-xHA biological material. The preparation method comprises the following steps: weighing Ti, Mo, Zr, Sn and Nb powder raw materials; the weighed powder and stainless steel balls are put into a stainless steel ball milling tank for first-time ball milling, and the mixed ball milling time is 8-12 h; the HA powder is weighed according to the proportion, after the nanoscale HA powder is put in, vacuumizing is conducted again, secondary mechanical ball-milling powder mixing is conducted, the rotating speed is 300 r / min, the ball-milling time is 2 hours, after secondary ball-milling is completed, the ball-milling mixed powder in a tank is taken out and placed in a vacuum drying box to be dried, and series of composite material powder is obtained. The nanoparticles can obviously reduce reaction activation energy, refine crystal grains, enhance powder activity, improve sintering capacity and induce chemical reaction, so that it is guaranteed that internal alloying of the composite material obtained after spark plasma sintering is sufficient and uniform.