基于热加工图的机床用双相不锈钢的热加工行为研究  

Study on Thermal Processing Behavior of 2205 Duplex Stainless Steel for Machine Tool

作　　者：朱永丽[1] 贺静[1] 宋平[2] 

机构地区：[1]重庆工程职业技术学院机械工程学院,重庆江津402260 [2]四川大学材料与工程学院,四川成都610000

出　　处：《铸造技术》2017年第1期185-188,共4页Foundry Technology

摘　　要：采用Gleeble3800热模拟机对2205双相不锈钢进行高温热压缩变形实验,分析该材料在变形温度为950~1 100℃、应变速率为0.1~50.0 s^(-1),工程变形量为66.6%不变的条件下的流变应力变化规律。基于动态材料模型建立了2205双相不锈钢的热变形本构方程和热加工图,确定了失稳区。得到2205双相不锈钢热变形激活能Qdef=405.8 k J/mol,结合热加工图确定了最佳的热加工区间为变形温度为1 050~1 100℃,应变速率为0.1~1.0 s^(-1)。为2205双相不锈钢的热加工工艺提供依据。The hot compression test of 2205 duplex stainless was carried out by thermal mechanical simulator of Gleeble 3800 at the temperature of 950～1 100 ℃ and the strain rates of 0.1～50.0 s^-1. A hot processing map was developed on the basis of the principles of dynamic materials modeling using these data to study the hot characteristics of 2205 duplex stainless. Thermal deformation activity energy of 2205 duplex stainless was determined, it is 405.8 k J/mol. According to the processing map, an optimum hot working range was established, it is the temperature of 1 050～1 100 ℃ and the strain rate of0.1～1.0 s^-1.

关 键 词：2205双相不锈钢 热变形本构方程 热加工图 

分 类 号：TG142.71[一般工业技术—材料科学与工程]