摘要
为了研究超级奥氏体不锈钢Cr20Ni24Mo6N钢的高温变形行为,采用Gleeble热模拟试验机进行了等温压缩试验,建立了合金的热加工图。结果表明,当变形温度为1 000~1 200℃时,Cr20Ni24Mo6N钢的流变曲线表现出典型的"加工硬化+动态再结晶软化"特点;Cr20Ni24Mo6N钢的热激活能Q为678.656 kJ/mol。通过加工图与微观组织综合分析得出,超级奥氏体不锈钢Cr20Ni24Mo6N的合适热加工工艺为,应变速率为10 s^(-1)左右,应变量为0.5~0.8,变形温度为1 150~1 200℃。
In order to study the high temperature deformation behavior of super austenitic stainless steel Cr20Ni24Mo6N, isothermal thermal compression test was carried out by Gleeble thermal simulation test machine, and the processing map of the alloy was established.The results show that the flow stress curves of Cr20Ni24Mo6N show the typical characteristics of ＂Working Hardening＋Dynamic Recrystallization Softening＂ when the deformation temperature is 1 000-1 200℃. The hot deformation activation energy is 678.656 kJ/mol. Through the comprehensive analysis of the microstructure and the processing map, the suitable hot working process windows of Cr20Ni24Mo6N superaustenitic stain- less steel is obtained, which the strain rate is 10 s-1, the strain is about 0.5-0.8 and the temperature is about 1 150-1 200 ℃.
出处
《钢铁》
CAS
CSCD
北大核心
2017年第10期72-77,共6页
Iron and Steel
基金
国家重点研发计划资助项目(2016YFB0300200)
国家863计划资助项目(2015AA034301)
山西省应用基础研究资助项目(201601D102022)
关键词
超级奥氏体不锈钢
高温变形
热加工图
显微组织
superaustenitic stainless steel
hot deformation
processing map
microstructure
