固溶处理对Cr18Ni31NbAl奥氏体不锈钢组织和抗拉强度的影响  

Effect of Solution Treatment on Microstructure and Tensile Strength of Cr18Ni31NbA1 Austenite Stainless Steel

作　　者：刘天 程晓农[1,2] 罗锐[1] 郑琦[1] 王皎 陈光 杨乔 LIU Tian;CHENG Xiaonong;LUO Rui;ZHENG Qi;WANG Jiao;CHEN Guang;YANG Qiao(School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China;Nantong Research Institute of Materials Engineering,Nanjing University,Nantong 226000,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]南京大学南通材料工程技术研究院,江苏南通226000

出　　处：《热加工工艺》2018年第24期181-185,共5页Hot Working Technology

基　　金：国家高技术研究发展计划(863)项目(2012AA03A501);江苏省重点实验室开放课题(hsm1304);江苏大学人才项目(11JDG141;12JDG066)

摘　　要：研究了不同固溶处理工艺(1050、1100、1150、1200℃,保温15、30、45、60 min)对新型Cr18Ni31NbAl奥氏体不锈钢组织和抗拉强度的影响。结果表明,提高固溶处理温度能促进合金晶粒尺寸长大;1050～1200℃固溶处理时,晶粒正常长大,晶粒长大激活能Q=187 kJ/mol;合金的抗拉强度随固溶温度的升高或固溶时间的延长逐渐降低。The effects of different solution treatments(1050, 1100, 1150, 1200 ℃ for 15, 30, 45, 60 min) on the microstructure and tensile strength of the new Cr18Ni31 NbAl austenite stainless steel were studied. The results show that increasing the solution temperature can promote the growth of grain sizes;when solution treatment is 1050-1200 ℃, the grains grow up normally and the activation energy of grain growth is 187 kJ/mol;the tensile strength of the alloy decreases gradually with the increase of solution temperature or the extension of solution time.

关 键 词：铁镍基合金 固溶处理 显微组织 抗拉强度 

分 类 号：TG156.94[金属学及工艺—热处理] TG142.1[金属学及工艺—金属学]