加氮对锻造CoCrMo合金微观组织和力学性能的影响  

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

作　　者：孙国强[1] 邢长军[1] 姚春发[1] 宁小智[1] 吴林[1] Sun Guoqiang;Xing Changjun;Yao Chunfa;Ning Xiaozhi;Wu Lin(Institute of Steel for Engineering,Central Iron and Steel Research Institute,Beijing 100081)

机构地区：[1]钢铁研究总院工程用钢所,北京100081

出　　处：《特殊钢》2022年第1期90-92,共3页Special Steel

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Co Cr Mo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1160 MPa提高至1360 MPa。Two heats of Co66Cr28Mo6 alloy with 0.005%N and 0.190%N are melted by 100 kg VIF+ESR process,and forged toΦ15 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 1160 MPa to 1360 MPa.

关 键 词：形变孪晶 位错 N CoCrMo合金 纳米析出相 

分 类 号：TG132[一般工业技术—材料科学与工程]