13Cr超级马氏体不锈钢热变形特性

Thermal deformation characteristics of 13Cr supermartensitic stainless steel

为了探讨生产13Cr超级马氏体不锈钢合适的热变形温度,在Gleeble1500热模拟试验机上对13Cr超级马氏体不锈钢进行了应变速率为2.5s-1、不同变形温度下的高温热塑性试验及热压缩试验,对变形后的试样进行了金相组织观察,并对回火后组织中逆变奥氏体含量进行了测定。结果表明,13Cr超级马氏体不锈钢回火前的马氏体板条粗大,回火后的马氏体发生显著的细化;根据高温热塑性曲线、热变形过程再结晶组织及回火后逆变奥氏体含量,确定13Cr超级马氏体不锈钢适宜的变形温度为1050~1150℃。

In order to investigate the suitable thermal deformation temperature for producing 13Cr supermartensitic stainless steel,high-temperature thermoplastic test and thermal compressive deformation test of 13Cr supermartensitic stainless steel at different temperatures with the strain rate remaining 2.5s-1 were carried out on Gleeble 1500 thermal simulated test machine.The microstructures of the deformed specimens were observed and the reversed austenite content after tempering was detected.The results showed that the martensite lath bundle before tempering was thick and it was significantly refined after tempering.According to the high-temperature thermoplastic curve,the recrystallized microstructures during the thermal deformation and the reversed austenite content after tempering,it can be concluded that the proper deformation temperature of 13Cr supermartensitic stainless steel was 1050-1150℃.