Preparation method of Co25Cr5W5Mo alloy spherical fine powder

A spherical, fine powder technology, applied in the field of powder alloys, can solve the problems of non-concentrated particle size distribution, coarse powder, etc., and achieve obvious effects

Inactive Publication Date: 2019-04-16
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing Co25Cr5W5Mo alloy spherical fine powder, which solves the problems of non-concentrated particle size distribution and coarse powder of Co25Cr5W5Mo alloy powder prepared by existing preparation methods

Method used

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  • Preparation method of Co25Cr5W5Mo alloy spherical fine powder
  • Preparation method of Co25Cr5W5Mo alloy spherical fine powder
  • Preparation method of Co25Cr5W5Mo alloy spherical fine powder

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preparation example Construction

[0020] A kind of preparation method of Co25Cr5W5Mo alloy spherical fine powder of the present invention, as figure 1 As shown, the specific operation process includes the following steps:

[0021] Step 1, using the Co25Cr5W5Mo master alloy secondary smelting ingot-shaped blank obtained by secondary vacuum self-consumption smelting, the obtained master alloy secondary smelting ingot-shaped blank is machined by numerical control and lathe to obtain a powder that meets the requirements of plasma rotating electrode atomization. Required Co25Cr5W5Mo alloy rods;

[0022] The composition of the Co25Cr5W5Mo alloy rod obtained in step 1 is: Cr is 20.7-26.7%; W is 3.4-7.4%; Mo is 3.0-6.0%; Si is ≤ 1.5%, and the rest is Co; the specification of the Co25Cr5W5Mo alloy rod is : The diameter is 50mm-80mm, the length is 500mm-700mm, the surface roughness is 0.9μm-1.0μm, and the straightness is 0.010mm-0.020mm;

[0023] Step 2, put the Co25Cr5W5Mo alloy rod obtained in step 1 into the whole ...

Embodiment 1

[0041]Step 1, adopt the Co25Cr5W5Mo master alloy secondary smelting ingot-like billet obtained by secondary vacuum self-consumption smelting, and the obtained master alloy secondary smelting ingot-like billet is processed by numerical control and lathe to obtain a powder that meets the requirements of plasma rotating electrode atomization powder production. Co25Cr5W5Mo alloy bar, Co25Cr5W5Mo alloy bar composition includes Co as balance; Cr is 24.56%; W is 4.57%; Mo is 4.27%; Si is 0.48%; the specifications of Co25Cr5W5Mo alloy bar are: diameter 55mm, length is 700mm, the surface roughness is 0.946μm, and the straightness is 0.020mm;

[0042] Step 2, place the Co25Cr5W5Mo alloy bar obtained in step 1 in the complete set of powder milling equipment for vacuum treatment, and fill with 35% argon and 65% helium mixed inert gas, the working pressure is 0.12MPa, and start the powder milling equipment. Atomization function, ignite the plasma generator at the same time, adjust the rota...

Embodiment 2

[0051] Step 1, adopt the Co25Cr5W5Mo master alloy secondary smelting ingot-like billet obtained by secondary vacuum self-consumption smelting, and the obtained master alloy secondary smelting ingot-like billet is processed by numerical control and lathe to obtain a powder that meets the requirements of plasma rotating electrode atomization powder production. The Co25Cr5W5Mo alloy bar, the composition of the Co25Cr5W5Mo alloy bar includes Cr 24.50%; W 4.60%; Mo 4.32%; Si 0.49%; is 500mm, the surface roughness is 0.98μm, and the straightness is 0.010mm;

[0052] In step 2, the Co25Cr5W5Mo alloy bar obtained in step 1 is placed in a complete set of powder milling equipment for vacuum treatment, and filled with 35% argon and 65% helium mixed inert gas, the working pressure is 0.15MPa, and the powder milling equipment is started. Atomization function, ignite the plasma generator at the same time, adjust the rotation speed of the Co25Cr5W5Mo alloy bar to 30000r / min, use the plasma g...

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Abstract

The invention discloses a preparation method of Co25Cr5W5Mo alloy spherical fine powder. The end surface of a rod material is heated through a plasma gun so that the rod material can be melted, metalliquid drops are thrown away by the centrifugal force generated by the high-speed rotation of the rod material, inert gas is blown into the metal liquid drop condensation flying process so that the metal liquid drops can be rapidly solidified and cooled, the collected powder is placed in an ultrasonic vibration sieve to be subjected to a sheet screen, metal weaving screen screening, electrostaticseparation, powder non-metal inclusion treatment and the like, and finally the pure Co25Cr5W5Mo alloy spherical fine powder is formed. The powder prepared by the method is relatively good in sphericity, high in yield and good in powder morphology, and under the protection of inert gas, the probability that the powder is polluted is reduced.

Description

technical field [0001] The invention belongs to the technical field of powder alloys, and in particular relates to a preparation method of Co25Cr5W5Mo alloy spherical fine powder. Background technique [0002] Cobalt-based alloys, that is, CoCrMo alloys, are used in the aerospace field for their high strength, good thermal fatigue resistance, thermal corrosion resistance and abrasion resistance, and good weldability to make aviation jet engines and industrial gas turbines. , guide vanes of marine gas turbines and diesel engine nozzles, etc. Cobalt-based alloys also have good biocompatibility and chemical stability, can maintain a passivated state in the human body, and have no obvious tissue reactions. Therefore, CoCrMo alloys are also used in the fields of biomaterials and new energy. [0003] With the rise of additive manufacturing (AM), the requirements for metal powder materials are very high, such as: high powder purity, small changes in chemical elements, high spheric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/10C22C19/07
CPCC22C19/07B22F9/10B22F2201/10B22F2202/01B22F1/065B22F1/14
Inventor 兰剑刘洋左振博王庆相赖运金梁书锦韩志宇瞿宗宏周丹魏文辉陈富璐张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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