高锰钢辙叉淬火冷却过程模拟及淬火设备优化  

Quenching cooling process simulation of high manganese steel frog and optimization of quenching equipment

作　　者：柳亚楠 刘洪武 李学通[2] LIU Yanan;LIU Hongwu;LI Xuetong(China Railway Shanhaiguan Bridge Group Co.,Ltd.,Qinhuangdao 066205,Hebei,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,Hebei,China)

机构地区：[1]中铁山桥集团有限公司,河北秦皇岛066205 [2]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《金属加工（热加工）》2024年第3期83-86,90,共5页MW Metal Forming

摘　　要：高锰钢导热性能较差,导致辙叉在淬火时心部冷却速度较慢,容易在心部产生超标碳化物。通过热模拟试验和有限元数值模拟分析了高锰钢冷却过程中的显微组织和温度变化情况。热模拟试验结果表明:随着冷却速度增加,高锰钢析出碳化物逐渐减少,在5℃/s冷却速度下,析出碳化物级别为X2级。根据有限元模拟结果改进了冷却设备,使改进后的高锰钢心部冷却速度达到5℃/s,心部析出碳化物级别由X3级提升到X2级,力学性能得到提高,从而提高了高锰钢辙叉的产品质量。The poor thermal conductivity of high manganese steel leads to a slow cooling rate in the center of the frog during quenching,making it easy to produce excessive carbides in the center.The microstructure and temperature variation of high manganese steel during cooling process were analyzed by thermal simulation test and finite element numerical simulation.The results of thermal simulation test showed that with the increase of cooling rate,the precipitated carbides of high manganese steel gradually decreased.At the cooling rate of 5℃/s,the level of precipitated carbides was X2 grade.According to the finite element simulation results,the cooling equipment was improved,and the cooling rate of the improved high manganese steel core reached 5℃/s.The level of precipitated carbides in the core of high manganese steel was increased from X3 to X2,and the mechanical properties were improved,thus improving the product quality of high manganese steel frog.

关 键 词：高锰钢 辙叉 热处理 冷却 换热系数 

分 类 号：TG161[金属学及工艺—热处理] TG155.3[金属学及工艺—金属学] U213.62[交通运输工程—道路与铁道工程]