高速钢拉刀刃激光熔覆钴基复合材料工艺参数优化研究  

Study on Optimization of Process Parameters of Laser Cladding Cobalt Matrix Composites on High Speed Steel Broach Blade

作　　者：张红燕[1,2] 叶雪文 郝新辉 周俊杰 梁国星 Zhang Hongyan;Ye Xuewen;Hao Xinhui;Zhou Junjie;Liang Guoxing

机构地区：[1]太原工具厂有限责任公司 [2]高端精密刀具系统省技术创新中心 [3]太原理工大学机械工程学院 [4]精密加工山西省重点实验室

出　　处：《工具技术》2024年第10期46-52,共7页Tool Engineering

基　　金：山西省自然科学基金(201801D121174);山西省高新技术领域重点研发计划(201903D121068);中央引导地方科技发展资金项目(YDZJSX2021B003);国家自然科学基金(52105473);山西省基础研究计划项目(20210302124050,20210302124121);山西省创新平台基地建设专项(202104010911007);山西省高等学校科技创新项目(2021L086)。

摘　　要：通过响应曲面Box-Behnken设计试验,研究工艺参数对高速钢表面激光熔覆Stellite157/WC/TiC复合材料几何特征和硬度的影响。建立变量激光功率、扫描速度、送粉速率与响应目标熔覆层宽度、宽高比、稀释率、硬度之间的数学模型。针对刀刃熔覆,对熔覆层几何特征和硬度进行优化控制,得到最优工艺参数组合为:激光功率820W,扫描速度237mm/min,送粉速率9g/min,使用优化后的工艺参数进行刀刃熔覆试验,熔覆后硬度为840HV,达到刀刃原有的硬度且满足加工余量,为激光熔覆工艺参数优化、高速钢拉刀刀刃修复提供了参考依据。The effects of process parameters on the geometric characteristics and hardness of Stellite157/WC/TiC composites by laser melting on HSS surfaces are investigated by response surface Box-Behnken design tests.Mathematical models are established between variable laser power,scanning speed,powder feeding rate and response target cladding layer width,aspect ratio,dilution rate and hardness.For knife edge melting,the geometric characteristics and hardness of the melted layer are optimally controlled.The optimal combination of process parameters is optimized and verified as follows:laser power 820W,scanning speed 237mm/min,powder feeding rate 9g/min.Using the optimized process parameters for knife edge melting test,the hardness of the melted layer is 840HV,which reaches the original hardness of the knife edge and satisfied the machining allowance.The hardness of the edge is 840HV,which met the original hardness of the edge and the machining allowance.It provides a reference basis for the optimization of the laser cladding process parameters and the repair of HSS broach blade.

关 键 词：激光熔覆 工艺参数 响应曲面 CO基合金 拉刀修复 

分 类 号：TG715[金属学及工艺—刀具与模具] TH162[机械工程—机械制造及自动化]