履带销轴用1E1158M钢的奥氏体混晶情况  

Mixed crystal of austenite grain size in track pins 1E1158 Msteel

作　　者：王欢 胡佳丽 张朝磊[1] 李戬 苗红生[3] WANG Huan;HU Jia-li;ZHANG Chao-lei;LI Jian;MIAO Hong-sheng(School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Mechanical Engineering,Qinghai University,Xining 810016,Qinghai,China;Qinghai Special Steel Engineering Technology Research Center,Xining Special Steel Co.,Ltd.,Xining 810005,Qinghai,China)

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]青海大学机械工程学院,青海西宁810016 [3]西宁特殊钢股份有限公司青海省特殊钢工程技术研究中心,青海西宁810005

出　　处：《钢铁》2020年第11期126-132,139,共8页Iron and Steel

基　　金：青海省科技计划资助项目(2018-ZJ-747)。

摘　　要：为了研究不同终轧温度下履带销轴用1E1158M钢奥氏体混晶情况,利用热模拟试验、显微组织定量分析以及截距法对不同状态下奥氏体晶粒以及本质晶粒的大小形貌进行研究,并提出了合理的终轧温度。结果表明,热轧态组织和正火态组织的粗化温度均为850℃,终轧温度对晶粒混晶程度有影响。终轧温度为850℃时,轧制终止时的奥氏体晶粒发生部分再结晶,混晶程度严重。随着终轧温度的升高,本质晶粒不均匀程度减小,建议终轧温度为1 000℃。The mixed crystal of austenite grain size in track pins 1 E1158 Msteel was investigated at different finishing temperatures,then the grain size and it′s microstructure were adopted to study the effect of different finishing temperatures by thermal simulation test,quantitative analysis of microstructure and intercept method.The results show that the abnormal grain growth temperature of hot-rolled and normal-fired microstructures is both 850 ℃,and the finishing rolling temperature has an effect on mixed crystal degree.When the finish rolling temperature is 850 ℃,the austenite grains are partially recrystallized at the end of rolling,and the degree of mixed crystals is serious.As the finishing temperature increases,the inhomogeneity of the intrinsic grain size decreases and the recommended finishing temperature is 1 000℃.

关 键 词：奥氏体晶粒 本质晶粒 混晶 终轧温度 1E1158M钢 

分 类 号：TG142.1[一般工业技术—材料科学与工程]