CoCrMo powder hot isostatic pressing forming method based on PREP technique

A technology of hot isostatic pressing and process, which is applied in the field of static pressing, can solve the problems of difficult to meet the SLM forming process and low yield of fine powder, and achieve the goal of improving material utilization, improving various performances, and reducing forming costs Effect

Inactive Publication Date: 2018-05-08
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powder prepared by plasma rotating electrode powder (PREP) has a perfect spherical shape, better fluidity, and avoids defects such as hollow powder and satellite powder, so it is very suitable for forming by HIP technology; Low yield, difficult to meet the needs of SLM forming process

Method used

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  • CoCrMo powder hot isostatic pressing forming method based on PREP technique
  • CoCrMo powder hot isostatic pressing forming method based on PREP technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The hot isostatic pressing method of CoCrMo powder based on PREP process includes the following steps:

[0019] 1) CoCrMo alloy powder was prepared by PREP process, and the particle size was D50=100μm obtained by classification;

[0020] 2) The CoCrMo alloy powder is machined into a sheath with 304 stainless steel, cleaned with acetone, annealed at high temperature, and then checked for leaks;

[0021] 3) The CoCrMo alloy powder after leak detection is formed by hot isostatic pressing equipment to obtain a formed part, the pressure holding temperature is 1200°C, the pressure is 130MPa, the heating rate is 15°C / min, and the cooling rate is 5°C / min;

[0022] 4) Use wire cutting samples on the formed parts in step 3) to test the tensile properties at room temperature.

[0023]

Embodiment 2

[0025] The hot isostatic pressing method of CoCrMo powder based on PREP process includes the following steps:

[0026] 1) CoCrMo alloy powder was prepared by PREP process, and the particle size was D50=50μm obtained by classification;

[0027] 2) The CoCrMo alloy powder is machined into a sheath with 304 stainless steel, cleaned with acetone, annealed at high temperature, and then checked for leaks;

[0028] 3) The CoCrMo alloy powder after leak detection is formed by hot isostatic pressing equipment to obtain a formed part, the pressure holding temperature is 1180°C, the pressure is 100MPa, the heating rate is 12°C / min, and the cooling rate is 8°C / min;

[0029] 4) Use wire cutting samples on the formed parts in step 3) to test the tensile properties at room temperature.

[0030]

Embodiment 3

[0032] The hot isostatic pressing method of CoCrMo powder based on PREP process includes the following steps:

[0033] 1) CoCrMo alloy powder was prepared by PREP process, and the particle size was D50=150μm obtained by classification;

[0034] 2) The CoCrMo alloy powder is machined into a sheath with 316L stainless steel, cleaned with acetone, annealed at high temperature, and then checked for leaks;

[0035] 3) The CoCrMo alloy powder after leak detection is formed by hot isostatic pressing equipment to obtain a formed part, the pressure holding temperature is 1220°C, the pressure is 145MPa, the heating rate is 10°C / min, and the cooling rate is 2°C / min;

[0036] 4) Use wire cutting samples on the formed parts in step 3) to test the tensile properties at room temperature.

[0037] .

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Abstract

The invention provides a CoCrMo powder hot isostatic pressing forming method based on a PREP technique. The CoCrMo powder hot isostatic pressing forming method comprises the following steps that 1, CoCrMo alloy powder is prepared through the PREP technique, and grading is conducted to obtain the CoCrMo alloy powder with the diameter being 50-150 [mu]m; 2, a CoCrMo forming piece is prepared througha hot isostatic pressing technology; and 3, an alloy is sampled correspondingly and used for tensile property detection. The CoCrMo alloy prepared by the method has the characteristics that the forming mode is simple, the strength is high, and the plasticity is high, and good isotropic homogeneity is kept.

Description

technical field [0001] The invention belongs to the technical field of metal hot isostatic pressing, and in particular relates to a method for hot isostatic pressing of CoCrMo powder based on a PREP process. Background technique [0002] The Hot Isostatic Pressing (HIP) process is to place the product in a closed container, apply equal pressure to the product in all directions, and apply high temperature at the same time. Under the action of high temperature and high pressure, the product can be sintered and densified. Hot isostatic pressing is an indispensable means for the production of high-performance materials and the development of new materials. It can be directly powder molded, and the powder is loaded into the package (similar to the role of a mold). The package can be made of metal or ceramics (low carbon steel, Ni , Mo, glass, etc.), and then use nitrogen and argon as the pressurizing medium to directly heat and pressurize the powder to form a powder metallurgy pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/15B22F9/14
CPCB22F3/15B22F9/14B22F2998/10
Inventor 闫飞刘洋陈小林韩志宇王庆相梁书锦张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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