谐波减速器柔轮用特殊钢RL40的组织特性  

Structure and Characteristics of Special Steel RL40 for Flexspline of Harmonic Reduction Gear

作　　者：王洋 王欢 张朝磊[2] 王浩 张旭[3] 苗红生[3] Wang Yang;Wang Huan;Zhang Chaolei;Wang Hao;Zhang Xu;Miao Hongsheng(Beijing CTKM Harmonic Drive Co Ltd,Beijing 101318;School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083;Xining Special Steel Co Ltd,Xining 810005)

机构地区：[1]北京中技克美谐波传动股份有限公司,北京101318 [2]北京科技大学材料科学与工程学院,北京100083 [3]西宁特殊钢股份有限公司,西宁810005

出　　处：《特殊钢》2021年第3期76-78,共3页Special Steel

摘　　要：通过光学显微定量分析和热膨胀实验,研究了柔轮用钢RL40(/%:0.40C,0.90Cr,1.85Ni,0.25Mo,0.05Nb,0.016Ti)的微观组织、相变点和奥氏体晶粒粗化规律等材料基本特性。结果表明:轧材组织为贝氏体+马氏体,原始奥氏体晶粒平均尺寸为14.0μm,晶粒度级别为9.09.5,平均标准偏差均在0.460.48;相变点Ac_(1)为729℃,Ac3为769℃,Ms点为281℃;奥氏体晶粒粗化温度为1000℃。The materials basic characteristics of structure,austenite grain coarsening and phase transformation point of RL40 steel for flexpline(/%:0.40 C,0.90 Cr,1.85 Ni,0.25 Mo,0.05 Nb,0.016 Ti)has been studied by the quantitative analysis of optical microscopy and thermal expansion experiment.The results show that the microstructure of the rolled bar is bainite+martensite,the average grain size of primary austenite is 14.0μm,and the austenite grain size rating is 9.09.5,and the average standard deviation is 0.460.048.The transformation point Ac_(1)is 729℃,Ac3 is 769℃,Ms is28℃,and the austenite grain coarsening temperature is 1000℃.

关 键 词：谐波减速器柔轮用钢RL40 粗化温度 相变点 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TH132.46[金属学及工艺—金属材料]