固溶处理温度对氮强化高锰奥氏体不锈钢组织和性能的影响

Influence of Solid Solution Temperature on the Microstructure and Properties of 22Mu-13Cr-5Ni-0.25N Austenitic Stainless Steel

研究了固溶处理温度对22Mn－13Cr－5Ni－0．25N奥氏体不锈钢组织和性能的影响。结果表明，随固溶处理温度提高，奥氏体晶粒尺寸增大，强度降低，延伸率和断面收缩率变化不大。在拉伸变形过程中沿｛111｝γ面产生形变孪晶，先形成的形变孪晶阻碍位错运动，使强度进一步增加。

The influence of solid solution temperature on the microstructure and properties of 22Mn-13Cr-5Ni-0. 25N austenitic stainless steel has been investigated. The results show that with increasing the solution temperature,the austenite grain size increases,and strength decreases, while elongation and reduction of area have the small variation. The deformation twins are formed along {111}γ planes during tensile deformation. The deformation twins are expected to be strong obstacles to the subsequent dislocation motion, leading to the higher strength.