UNS S32750双相不锈钢的热加工变形行为  

Hot Deformation Behavior of Duplex Stainless Steel UNS S32750

作　　者：赵新[1] 陈雷[1] 

机构地区：[1]郑州航空工业管理学院机电工程学院,郑州450015

出　　处：《机械工程材料》2016年第4期104-106,110,共4页Materials For Mechanical Engineering

基　　金：航空科学基金资助项目(2010ZE55012);郑州市科技攻关计划项目(121PPTGG361-1)

摘　　要：采用热模拟试验机在温度9001 200℃,应变速率0.1~10s^(-1)的条件下对UNS S32750双相不锈钢进行了热压缩试验,研究了其热加工变形行为,并建立了热变形方程。结果表明:在1200℃不同应变速率下压缩变形时,此双相不锈钢发生了动态回复,且应变速率越低其动态回复现象越明显;在900℃不同应变速率下压缩变形时,则发生了动态再结晶,且应变速率越高其动态再结晶现象越明显;该双相不锈钢热压缩变形受热激活过程控制,热变形激活能为503kJ·mol^(-1),热变形方程为ε·=8.3×1018[sinh(0.008 6σp)]4.2exp(-503 000/RT)。The hot compression experiments of the duplex stainless steel UNS S32750 were carried out at the temperatures from 900 ℃to 1 200 ℃ and the strain rates from 0.1s-1 to 10s-1 by the thermal simulator.The hot deformation behavior of the duplex stainless steel was studied and the hot deformation equation was established.The results show that during compression at 1 200 ℃ and different strain rates,the dynamic recovery occurred in the duplex stainless steel and the dynamic recovery phenomenon was relatively obvious at a relatively low strain rate.During compression at 900 ℃ and different strain rates,the dynamic recrystallization occurred and the dynamic recrystallization phenomenon was relatively obvious at a relative high strain rate.The compression deformation of the duplex stainless steel was controlled by the thermally activated process.The thermally activated energy of the duplex stainless steel was 503 kJ· mol-1 and the hot deformation equation was listed asε·= 8.3 ×1018[sinh（0.008 6σp）]4.2exp（-503 000/RT）.

关 键 词：双相不锈钢 热加工 热变形方程 

分 类 号：TG316[金属学及工艺—金属压力加工]