总第328期2023年第4期HEBEIMETALLUＲGYTotalNo．3282023，Number4轧机衬板激光淬火工艺优化及变形的消除王鹏鹏(河北天越激光再制造科技有限公司，河北迁安064400)摘要:激光表面淬火是激光表面改性领域中最先进的技术，它利用金属良好的导热性，将高能激光束照射到工件表面，使表层温度迅速升高至相变点之上(低于熔点)，当激光束移开后，工件快速地自然冷却，实现材料的相变硬化。介绍了轧机衬板激光淬火的工艺特点，研究了激光表面淬火工艺参数对工件组织及性能的影响，确定了满足轧机衬板硬度和安装精度的工艺参数:激光功率1600～1700W，扫描速度8～10mm/s，光斑宽度15～17mm。通过分析淬火后工件变形的原因，提出可利用专用加热设备使工件产生反向预变形，消除因激光淬火残余压应力产生的平面度变形。关键词:激光淬火;功率;扫描速度;光斑宽度;反向预变形中图分类号:TG156．3文献标志码:A文章编号:1006－5008(2023)04－0057－05doi:10．13630/j．cnki．13－1172．2023．0413OPTIMIZATIONOFLASEＲHAＲDENINGPＲOCESSANDELIMINATIONOFDEFOＲMATIONOFＲOLLINGMILLLINEＲSWangPengpeng(HebeiTianyueLaserＲemanufacturingTechnologyCo．，Ltd．，Qian＇an064400，Hebei)Abstract:Lasersurfacequenchingisthemostadvancedtechnologyinthefieldoflasersurfacemodification，itusesgoodthermalconductivityofmetals，thehigh－energylaserbeamirradiatestothesurfaceofthework-piece，sothatthesurfacetemperaturequicklyrisesabovethephasechangepoint(belowthemeltingpoint)，whenthelaserbeamisremoved，theworkpiecequicklyandnaturallycoolstoachievethephasechangehard-eningofthematerial．Theprocesscharacteristicsoflaserquenchingofrollingmilllinerwereintroduced，theinfluenceoflasersurfacequenchingprocessparametersonthemicrostructureandperformanceofthework-piecewasstudied，andtheprocessparameterstomeetthehardnessandinstallationaccuracyoftherollingmilllinerweredetermined:laserpower1600～1700W，scanningspeed8～10mm/s，spotwidth15～17mm．Byanalyzingthereasonsforthedeformationoftheworkpieceafterquenching，itisproposedthatspecialheatingequipmentcanbeusedtoreversethepre－deformationoftheworkpieceandeliminatetheflat-nessdeformationcausedbytheresidualcompressivestressoflaserquenching．Keywords:las...
