固溶时效后高氮奥氏体不锈钢的物理化学相分析

Physicochemical phase analysis of high nitrogen austenitic stainless steels after solution treatment and aging

摘要: 采用物理化学相分析技术研究了高氮奥氏体不锈钢固溶时效后的碳、氮化物析出行为,确定了析出相的类型、粒度分布、含量及组成结构式.结果表明:氮含量低的1Cr22Mn15N0.6以M₂₃C₆型碳化物析出为主,氮含量高的1Cr22Mn15N0.9以(CrFe)₂N_1-x型氮化物析出为主,高氮奥氏体不锈钢中析出物的总量随时效时间的延长而增加.

Abstract: Precipitation of nitrides and carbides in high nitrogen austenitic stainless steels after solution treatment and aging was investigated by using a physicochemical phase analysis method. The character, particle size distribution, content and structural formulae of phases in the alloy were determined. It is shown that the precipitate is mostly M₂₃C₆ carbide in 1Cr22Mn15N0.6 steel and (CrFe)₂N_1-x nitride in 1Cr22Mn15N0.9 steel respectively, and its volume fraction increases with prolonging the aging time.