双相不锈钢热变形后的静态软化行为及组织分析  

Static Softening Behavior and Microstructures Analysis of Duplex Stainless Steel After Hot Deformation

作　　者：王佳夫[1] 王月香[2] 花福安[1] 李建平[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004 [2]莱芜钢铁集团有限公司技术中心,山东莱芜271104

出　　处：《钢铁研究学报》2011年第9期46-49,共4页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(50971039);轧制技术及连轧自动化国家重点实验室(东北大学)自主研究课题资助项目

摘　　要：在MMS-200热模拟试验机上,采用不同道次压缩法研究了00Cr22Ni5Mo3N双相不锈钢的高温热变形行为,从双道次压缩试验数据中得到不同温度条件下的软化率曲线,并对变形显微组织进行了分析。结果表明：在1~400 s道次间隔时间内,软化率随时间延长而增加,在100 s之内基本完成静态软化。变形温度越高,静态软化行为越明显,在950℃以下时,静态软化不明显;结合试验数据,求出00Cr22Ni5Mo3N双相不锈钢的静态再结晶激活能Qrex=329 kJ/mol;在总变形量0.9,变形温度1 000℃的条件下,相对于2,3道次变形,单道次变形后组织中奥氏体含量要少。随着道次间隔时间的增加,奥氏体组织逐渐细化,相界曲线也由尖锐变得圆滑。The static softening behavior of 00Cr22Ni5Mo3N duplex stainless steel after hot deformation was investigated by using different-pass compression test in MMS-200 thermo-mechanical simulator.The static softening rate curves at different temperature were concluded based on double-pass compression experimental data,and deformation microstructures were analyzed.The results show that the static softening rate increases as the interval time prolongs in 400s,and the static softening is nearly completed in 100s.The higher the deformation temperature is,the higher the static softening rate is.The static softening behavior is not obvious below 950℃.According to experimental data,the value of 00Cr22Ni5Mo3N duplex stainless steel static recrystallization activation energy（Qrex=329kJ/mol） is gotten.Compared with two or three pass hot deformation,Austenite content is reduced at single pass deformation in the condition of total stain of 0.9 and deformation temperature of 1000℃.Fine austenite microstructures were obtained with increase of interval time,and the phase interface curves were changed from sharp to smooth.

关 键 词：双相不锈钢 热变形 静态软化 显微组织 

分 类 号：TG142.71[一般工业技术—材料科学与工程]