Effect of Adding Nitrogen on Microstructure and Mechanical Properties of Forged CoCrMo Alloy

Sun Guoqiang; Xing Changjun; Yao Chunfa; Ning Xiaozhi; Wu Lin

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Effect of Adding Nitrogen on Microstructure and Mechanical Properties of Forged CoCrMo Alloy

更新时间：2025-10-28

- Effect of Adding Nitrogen on Microstructure and Mechanical Properties of Forged CoCrMo Alloy
- Special Steel Vol. 43, Issue 1, Pages: 90-92(2022)
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- Received：07 May 2021，
  
  Online First：18 March 2022，
  
  Published：18 March 2022
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Sun Guoqiang, Xing Changjun, Yao Chunfa, et al. Effect of Adding Nitrogen on Microstructure and Mechanical Properties of Forged CoCrMo Alloy[J]. Special Steel, 2022, 43(1): 90-92.
DOI：

Sun Guoqiang, Xing Changjun, Yao Chunfa, et al. Effect of Adding Nitrogen on Microstructure and Mechanical Properties of Forged CoCrMo Alloy[J]. Special Steel, 2022, 43(1): 90-92. DOI：

摘要

采用 100 kg 真空感应炉 + 电渣双联冶炼 N 含量分别为 0．005% 和 0．190% 两炉 Co66Cr28Mo6 合金，并锻造成 Φ15 mm 棒材。在相同工艺条件下，含 0．190% N 的 CoCrMo 合金具有更细小的晶粒( 10 ～11 级)，且析出相以纳米级 M ( CN) 型形式存在于晶界处，大量的形变孪晶和位错交互，合金抗拉强度由 1 160 MPa 提高至 1 360 MPa。

Abstract

Two heats of Co66Cr28Mo6 alloy with 0. 005% N and 0. 190% N are melted by 100 kg VIF + ESR process

and forged to Φ15 mm bar. With the same process conditions

the CoCrMo alloy containing 0.190% N has a finer grain size (10～11 rating)

and the precipitates exist in the form of nanoscale M( CN ) type at the grain boundary. A large number of deformation twins and dislocation interactions further enhance the strength of the material

the tensile strength of alloy increases from 1 160 MPa to 1 360 MPa.

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