摘要
对淬火态U20Mn贝氏体轨钢在280~420℃温度区间进行回火,并对回火后的轨钢进行耐磨性测试,探索回火温度对轨钢显微组织、强度、韧性、硬度以及耐磨性的影响。结果表明,经280℃与340℃回火后,贝氏体轨钢具有更高的强度、冲击吸收能量与硬度,耐磨性测试表现出磨损量较低、表层疲劳裂纹尺寸较小、剥落坑较少、塑性变形层厚度较小等特点。回火温度在280~340℃区间,U20Mn贝氏体轨钢可获得最佳强韧性匹配与较好的抗接触疲劳性能及耐磨性。
Tempering in the temperature range of 280-420℃was conducted to quenched U20Mn bainitic rail steel,and wear resistance tests of the tempered rail steel were carried out to explore the effect of tempering temperature on the microstructure,strength,toughness,hardness,and wear resistance of the rail steel.The results show that the bainitic rail steel tempered at temperatures of 280℃and 340℃,respectively,obtains higher strength,impact absorbed energy,and hardness,and the wear resistance tests show lower wear loss,smaller surface fatigue crack size,fewer peeling pit,and thinner plastic deformation layer.It is indicated that the U20Mn bainitic rail steel tempered between 280℃and 340℃can achieve the best strength toughness matching,good contact fatigue resistance and wear resistance.
作者
高超
王旭
蒋宏利
王东梅
岑耀东
陈林
Gao Chao;Wang Xu;Jiang Hongli;Wang Dongmei;Cen Yaodong;Chen Lin(School of Materials Science and Engineering,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China;Bayuquan Branch of Angang Steel Co.,Ltd.,Yingkou Liaoning 115007,China)
出处
《金属热处理》
北大核心
2025年第8期118-126,共9页
Heat Treatment of Metals
基金
国家自然科学基金(52164046)
内蒙古自治区重点研发和成果转化计划(2023YFHH0036)。
关键词
贝氏体轨钢
回火
显微组织
耐磨性
滚动接触疲劳性能
bainite rail steel
tempering
microstructure
wear resistance
rolling contact fatigue property
作者简介
高超(1998-),男,硕士研究生,主要研究方向为钢轨热处理及其性能,E-mail:192916914@qq.com;通信作者:陈林,教授,硕士,E-mail:chenlin39805@163.com。
