34results about How to "Achieve alloying" patented technology

The invention discloses an in-situ self-generated nano-Al 2 o 3 A laser additive manufacturing method for strengthening an aluminum-based composite material, the method comprising the following steps: (1) mixing ZnO ceramic powder and AlSi10Mg aluminum alloy powder and ball milling to obtain a ZnO / AlSi10Mg composite powder; (2) preparing the composite powder The laser selective melting process is used for additive manufacturing forming to form a solid sheet; (3) The laser re-scans the solid sheet to form a remelted sheet; (4) Repeat steps (2) and (3) to finally form the original self-generated nano-Al 2 o 3 Reinforced aluminum matrix composites. In the present invention, laser is used to excite Al and ZnO to generate aluminum thermal reaction between them in situ. 2 o 3 Ceramic particles, and by improving the overall flow process design of the method, combining laser selective melting and laser remelting scanning, the aluminum matrix composite material obtained has high density, fine microstructure, and in-situ self-generated Al 2 o 3 The particle size is nanoscale, uniformly distributed, and its phase interface is well combined with the aluminum matrix.

The invention discloses a machining method of corrosion-resistant metal shelf, and belongs to the technical field of metal machining. The metal shelf is formed by machining through material blending and powder making, pressing forming, sintering and surface treatment. The metal shelf comprises raw materials of 4-6 % of Tl, 0.2-0.6 % of Be, 0.6-0.8 % of C, 0.6-1 % of Os, 1-3 % of Pb, 2-4 % of Sn, 0.4-0.8 % of Ir and the balance Fe and impurities; and the impurities comprise less than 0.055 % of S and less than 0.015 % of O. In the process of powder metallurgy, all organizational structures of metal are refined continuously by powder making through a mechanical method, atomic-level mixing is achieved finally, and alloying is realized; and a uniform and compact protective film is formed by combining a surface phosphating process.

An in-situ nanoparticle-enhanced CoCrFeNiMn high-entropy alloy and a preparation method thereof. The CoCrFeNiMn high-entropy alloy combines fine-grain strengthening and particle strengthening at the same time, and the synergistic effect of the two effectively improves the strength of the material, and its yield strength Significantly higher than ordinary CoCrFeNiMn alloys. The preparation method of the CoCrFeNiMn high-entropy alloy combines high-energy ball milling and hot extrusion technology, and uses the high-energy ball milling method to achieve alloying of elements, avoids volatilization and segregation of elements in the process of melting and casting, and refines crystal grains; The hot extrusion process achieves rapid powder consolidation and in-situ self-generated nanoparticles to prepare CoCrFeNiMn high-entropy alloys with both nano-particles and fine-grained structures, which effectively improves the material strength of CoCrFeNiMn high-entropy alloys. In addition, the method can directly use the existing industrial equipment for producing ODS superalloy, the cost is low, the size is not limited, and it is suitable for industrial production.

A multi-element negative electrode material magnesium alloy and a preparation method thereof, the multi-element negative electrode material magnesium alloy includes the following components in mass percentage: Al 4-8%, Pb 3-7%, Mn 0.2-0.4%, Zn 0.5-1.0% , In 0.6 ~ 1.0%, Ga 0.8 ~ 4.0%, Hg 0.7 ~ 1.7%, Ce 0.1 ~ 0.3%, the rest is Mg. The preparation method is as follows: (1) preparing Mg-Hg master alloy; (2) sequentially adding Al, Pb, Mn, Zn, In, Ga, Mg-Hg master alloy and Ce into the Mg melt, stirring and melting, and heat preservation Stand still; (3) semi-continuous casting, homogenizing annealing, hot extrusion billet opening, hot rolling, and it is ready. The multi-component negative electrode material magnesium alloy of the invention has high activity, anti-polarization, high voltage platform, short activation time and long discharge time; the invention has simple method, low cost and is suitable for industrialized production.

The invention relates to a SiC / M2 powder high-speed steel composite material. The composite material has a relative density of greater than 99% and hardness of 66-69HRC, and comprises nano-scale enhanced-phase particles SiC, submicron-scale hard-phase SiC and separated submicron-scale M6C type composite carbide, wherein the average particle size of the enhanced-phase particles SiC is 200nm, and the particle sizes of the hard-phase SiC and the M6C type composite carbide are not greater than 1[mu]m; and the matrix of the composite material is M2 high-speed steel, the particles SiC are uniformly distributed into the matrix in a dispersed manner as additional mass points, the composite material comprises the following raw material components with contents by volume percent: 85%-90% of M2 high-speed steel and 10%-15% of the particles SiC, the volume fraction of the particles SiC with particle sizes of not greater than 200nm in the particles SiC is 10%-20%, and the balance is particles with particle sizes of greater than 200nm and less than 1[mu]m. A preparation technology for a pre-alloyed composite powder is beneficial to obtaining the composite powder with a small and uniform particle size, preventing the agglomeration of the powder SiC, and realizing adequate alloying for the particles SiC and the matrix powder.

The invention discloses a high-nitrogen abrasion-resistant stainless steel griddle wire processing technology. Manganese and nitrogen are adopted, vanadium-nitrogen alloy is added, the content of nitrogen in molten steel is increased, alloying of the nitrogen is achieved, the use amount of nickel is reduced, or the nickel does not exist, and the molten liquid is purified, refined and homogenized; the manganese and the nitrogen replace the nickel, direct application of nitrogen alloy in production of stainless steel is achieved, the strength of the stainless steel griddle wire is improved, magnetism does not exist, and corrosion resistance, abrasion resistance and the like are achieved; meanwhile, the cost of stainless steel production and application is reduced by over 30 percent.

A negative electrode material magnesium alloy and a preparation method thereof. The negative electrode material magnesium alloy includes the following components in mass percentage: In 0.6-1.0%, Ga 0.8-4.0%, Hg 0.7-1.7%, Ce 0.1-0.3%, and for Mg. The preparation method is as follows: (1) preparing Mg-Hg master alloy; (2) sequentially adding In, Ga, Mg-Hg master alloy and Ce into Mg melt, stirring and smelting, heat preservation and standing to obtain a mixed melt; (3) Semi-continuous casting, homogenizing annealing, hot extrusion billet opening, hot rolling, and it is ready. The negative electrode material magnesium alloy of the invention has high activity, anti-polarization, high voltage platform and moderate hydrogen evolution capacity; the method of the invention has simple process and low cost, and is suitable for industrialized production.