两种坯型生产的高铁弹条用60Si2Mn钢盘条显微组织和性能  

Microstructure and properties of 60Si2Mn steel wire rod for high-speed railway bullets produced by two different shapes

作　　者：邓素怀 刘奋永 来萍 张玮 刘锟 DENG Suhuai;LIU Fenyong;LAI Ping;ZHANG Wei;LIU Kun(Research Institute of Technology,Shougang Group Co.,Ltd.,Beijing 100043,China;Beijing Railway Sciences and Shougang Track Technology Co.,Ltd.,Beijing 102206,China)

机构地区：[1]首钢集团有限公司技术研究院,北京100043 [2]北京铁科首钢轨道技术有限公司,北京102206

出　　处：《理化检验(物理分册)》2025年第2期6-10,共5页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：采用金相检验、电子背散射衍射分析、硬度测试等方法对不同尺寸连铸坯型60Si2Mn钢盘条的显微组织和力学性能进行分析。结果表明:采用两种坯型生产盘条的化学成分、热处理后的显微组织和力学性能都较为接近,但晶粒尺寸差异较大,采用大坯型生产盘条的奥氏体晶粒度、珠光体团尺寸均较大;当需要保证盘条的内部品质和晶粒细化时,可选用大方坯进行生产;可以通过增加粗轧阶段的变形量和优化连铸工艺参数来细化晶粒,以提高盘条的品质。The microstructure and mechanical properties of 60Si2Mn steel wire rods produced from different sizes of continuous casting billets were analyzed using metallographic examination,electron backscatter diffraction analysis,hardness testing.The results show that the chemical composition,microstructure and mechanical properties after heat treatment of the wire rods produced using two different blank shapes were relatively similar,but there was a significant difference in grain size.The wire rods produced using large blank shapes had larger austenite grain size and pearlite cluster size.When it was necessary to assure the internal quality and grain refinement of the wire rod,large billets could be used for production.By increasing the deformation during the rough rolling stage and optimizing the continuous casting process parameters,the grain could be refined to improve the quality of the wire rod.

关 键 词：高铁弹条 60Si2Mn钢盘条 连铸坯 晶粒尺寸 力学性能 显微组织 

分 类 号：TB31[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—物理冶金]