含钒铌高氮铬锰奥氏体不锈钢的热变形行为研究  

Study on hot deformation behavior of high nitrogen CrMn austenitic stainless steel containing V and Nb

作　　者：时钟平[1] 傅万堂[2,3] SHI Zhongping;FU Wantang(School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei 066004,China;State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei 066004,China;School of Material Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China)

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004 [3]燕山大学材料科学与工程学院,河北秦皇岛066004

出　　处：《燕山大学学报》2019年第4期337-342,共6页Journal of Yanshan University

基　　金：河北省自然科学基金资助项目(E2016203436)

摘　　要：用Gleeble3500热/力模拟试验机对含钒铌高氮铬锰奥氏体不锈钢在900~1200℃和0.01~10s^-1条件下进行热压缩变形,得到了其流变曲线,获得了热变形方程式,建立了热加工图,观察并分析了热变形组织。结果表明,含钒铌高氮铬锰奥氏体不锈钢的流变应力和峰值应变均随应变速率的提高和变形温度的降低而增大,其热变形激活能为759kJ/mol,在1100℃和0.01s^-1时,试验钢的功率耗散百分数最高可达42%。另外,在高温低应变速率下,试验钢经典动态再结晶容易发生,建议其在1150~1200℃和0.1~1s^-1的工艺条件下进行热加工。The hot compression of high nitrogen CrMn austenitic stainless steel containing V and Nb was conducted at 900~1 200℃and 0.01~10 s^-1 by using Gleeble-3500 thermal-mechanical simulator.The flow curves and hot deformation equation were obtained,the processing maps were established,and the hot deformation microstructure was observed.The results show that both the flow stress and peak strain increase with decreasing deformation temperature and increasing strain rate.The hot deformation activation energy(Q)of the steel is 759 kJ/mol,the highest efficiency of power dissipation is 42%at 1 100℃and 0.01 s^-1.In addition,higher temperature and lower strain rate benefit the occurrence of typical dynamic recrystallization.The suggested hot deformation processing is 1 150~1 200℃and 0.1~1 s^-1.

关 键 词：高氮钢 微合金化 热变形 动态再结晶 

分 类 号：TG142.1[一般工业技术—材料科学与工程]