冷变形及热处理工艺对奥氏体不锈钢0Cr18Ni12和0Cr16Ni14组织及磁性能的影响

从成分和组织稳定性,探讨了冷变形(0%～80%)及1 000～1 090℃固溶处理对0Cr18Ni12与0Cr16Ni14奥氏体不锈钢组织及磁性能的影响。结果表明:0Cr18Ni12与0Cr16Ni14不锈钢奥氏体稳定性优于SUS304,其中0Cr16Ni14奥氏体稳定性最佳;0Cr18Ni12与0Cr16Ni14不锈钢冷变形过程中均产生形变马氏体,0Cr16Ni14冷变形过程中相对磁导率始终保持在1.010以下,0Cr18Ni12形变马氏体比例最大可达3.5%,相对磁导率增大至1.353,经固溶热处理后,相对磁导率可控制在1.010以下;结合现场生产条件,制定出两种奥氏体不锈钢的固溶处理工艺为1 060℃每毫米保温80 s。

Effect of Cold Deformation and Heat Treatment Process on Microstructure and Magnetic Properties of Austenitic Stainless Steel 0Crl8Nil2 and 0Crl6Nil4

The effects of cold deformation (0% - 80% ) and 1000 ~ 1090 °C solid sulution treatment on the microstructure and magnetic properties of 0Crl8Nil2 and 0Crl6Nil4 austenitic stainless steels are discussed based on composition and structure stability. The results show that the austenite stability of stainless steel 0Crl8Nil2 and 0Crl6Nil4 is better than that of SUS304, and 0Crl6Nil4 is the best. Deformed martensite is formed during cold rolling deformation of stainless steel 0Crl8Nil2 and 0Crl6Nil4. The relative permeability of 0Crl6Nil4 during cold rolling is always below 1.010, the proportion of deformed martensite of 0Crl8Nil2 is up to 3.5% , and the relative permeability is increased to 1.353. After solution heat treatment, the relative permeability can be controlled below 1.010. Combined with the field production conditions, the heat treatment process of two kinds of austenitic stainless steels is solid solution treatment at 1060 °C for 80 s per mm.