摘要
采用激光-感应复合淬火的新工艺,将激光和电磁感应2种热源复合提高42CrMo钢激光淬火的淬硬层深度和均匀性。利用COMSOL Multiphysics 5.5软件对42CrMo复合淬火过程中温度场的演变过程进行分析,通过淬火实验对模型进行了验证,淬硬层深度模拟值与实验值一致性较高。采用该模型,比较了复合淬火与单一激光淬火和单一感应淬火在同工艺下淬硬层的表面温度和深度,分析了不同扫描速度和激光光斑尺寸对淬硬层深度的影响。通过实验对复合淬火的淬硬层深度、硬度、晶粒大小和显微组织进行分析。结果表明,激光-感应复合淬火可以有效提高试样的表面淬火温度,增大淬硬层宽度和深度,弥补单一激光淬火激光功率不足的缺点,通过模型预测了复合淬火最优扫描速度和光斑尺寸。相较于2种单一热源淬火,复合淬火的晶粒度和显微组织形态在深度方向上的变化趋势与激光淬火相似,但具有更高的淬硬层平均硬度。
A new process of laser-induction hybrid quenching was adopted in this study, which combined the laser and electromagnetic induction heat source to improve the depth and uniformity of hardened layer of 42CrMo steel laser quenching. The COMSOL Multiphysics 5.5 software was used to analyze the evolution process of temperature field during hybrid quenching process of 42CrMo steel. The model was verified by quenching experiments and the simulated depth of hardened layer is in good agreement with the experimental one. The surface temperature and depth of hardened layer by the hybrid quenching, single laser quenching and single induction quenching were compared in the model, and the effects of different scanning speed s and laser spot sizes on the depth of hardened layer were analyzed. The depth, hardness, grain size and microstructure of hardened layer by hybrid quenching were analyzed by experiments. The results show that the hybrid quenching can effectively improve the surface quenching temperature of the workpiece, increase the width and depth of hardened layer, and make up for the shortage of the single laser quenching power. The optimal scanning speed and laser spot size of the hybrid quenching were predicted by the model.Compared with two single quenching processes, the change trend of grain size and microstructure in depth direction of the hardened layer by hybrid quenching is similar to that by laser quenching, but the average hardness of hardened layer is larger.
作者
唐泽浩
张群莉
黄华
陈智君
曹军胜
姚建华
Tang Zehao;Zhang Qunli;Huang Hua;Chen Zhijun;Cao Junsheng;Yao Jianhua(College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Institute of Laser Advanced Manufacturing,Zhejiang University of Technology,Hangzhou 310023,China;Collaborative Innovation Center of High-end Laser Manufacturing Equipment(National“2011 Plan”),Zhejiang University of Technology,Hangzhou 310023,China;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2022年第7期2519-2528,共10页
Rare Metal Materials and Engineering
基金
国家重点研发计划(2018YFB0407301)
国家自然科学基金(52035014)
浙江省属高校基本科研业务费项目(RF-C2019003)。
关键词
激光淬火
电磁感应
42CRMO钢
数值模拟
几何特征
组织
laser quenching
electromagnetic induction
42CrMo steel
numerical simulation
geometric features
microstructure
