节镍奥氏体不锈钢Cr18Mn6Ni4N的组织及性能

发布时间：2018-08-19 06:29

【摘要】：为节约镍资源,研究了不同成分17.8~19.1%Cr,3.93~6.05%Mn,3.58~4.62%Ni,0.32~0.42%N节镍型奥氏体不锈钢固溶后的力学性能和耐蚀性能,以期获得可替代304不锈钢的新钢种。结果表明:Cr18.4Mn5.98Ni4.62N0.42不锈钢的力学性能和耐蚀性能与304不锈钢相当。分析了该成分不锈钢时效处理后的组织演变规律、冷变形过程中奥氏体稳定性及形变诱发马氏体相变过程。结果表明:800℃是Cr2N相析出的鼻尖温度,随着时效时间的增加,析出相首先以颗粒状形貌沿晶界析出,而后以胞状析出方式向晶内生长。冷轧压下率18.5%时尚未发现形变诱发马氏体组织,随着变形量增大,片层状ε'马氏体含量先增加后减少至消失,而板条状α'马氏体含量逐渐增多,相对磁导率增加,但其奥氏体稳定性远高于304不锈钢。可见,Cr18.4Mn5.98Ni4.62N0.42不锈钢可替代304不锈钢。
[Abstract]:In order to save nickel resources, the mechanical properties and corrosion resistance of nickel austenitic stainless steel with different composition 17.819.1 Cr-3.936.05 and Mn3.584.62Ni0.322N section nickel austenitic stainless steel after solid solution were studied in order to obtain a new type of steel which can replace 304 stainless steel. The results show that the mechanical properties and corrosion resistance of the stainless steel WCr18.4Mn5.98Ni4.62N0.42 are similar to those of 304 stainless steel. The evolution of microstructure, austenite stability and martensite transformation induced by deformation during cold deformation were analyzed. The results show that: 800 鈩，

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