基于灰色关联分析法的电火花沉积WC-12Co涂层工艺参数优化  

Optimization of Process Parameters of WC-12Co Coating by Electro-spark Deposition Based on Grey Correlation

作　　者：高磊 王明伟[1] 张文超 王晨曦 GAO Lei;WANG Mingwei;ZHANG Wenchao;WANG Chenxi(School of Mechanical Engineering and Automation,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学机械工程与自动化学院,辽宁大连116034

出　　处：《热加工工艺》2024年第12期57-61,共5页Hot Working Technology

基　　金：辽宁“百千万人才工程”培养经费资助项目(辽百千万立项[2017]88号);辽宁省自然科学基金指导计划项目(201602056)。

摘　　要：以WC-12Co为电极,氩气作为保护气体,在FS438钢表面电火花沉积WC-12Co涂层。选择电压、电容、频率和沉积时间为加工参数,采用正交实验方法进行实验,并对实验结果进行极差分析。对正交实验结果的涂层厚度和表面粗糙度进行无量纲化,计算其关联系数、关联度值,并进行灰色关联分析,最终实现多指标工艺参数的优化。利用光学显微镜,分析工艺参数优化后沉积层的表面形貌。结果表明:对WC-12Co涂层厚度和表面粗糙度影响最大的加工参数为电压和电容。当工艺参数为电压50 V、电容120μF、频率360 Hz、沉积时间4 min/cm^(2)时,所制备的WC-12Co涂层厚度为55.125μm,表面粗糙度为5.073μm,涂层表面较致密,光洁度较好,该涂层的厚度与表面粗糙度指标综合性能较为良好。The WC-12Co was deposited on the surface of FS438 steel with WC-12Co as the electrode and argon gas as the protective gas.Voltage,capacitance,frequency and deposition time were selected as processing parameters,orthogonal experiment method was used to carry out experiments,and range analysis of experimental results were obtained.The coating thickness and surface roughness of the orthogonal experiment results were processed using a dimensionless method,and their correlation coefficients and correlation values were calculated,and then the calculation results were analyzed with gray correlation,and finally the optimization of multi-index process parameters was realized.The surface morphology of the deposited layer prepared under the optimized process parameters was analyzed by optical microscope.The results show that the processing parameters that have the greatest influence on the thickness and surface roughness of the WC-12Co coating are voltage and capacitance.When the process parameters are voltage 50 V,capacitance 120μF,frequency 360 Hz,and deposition time 4 min/cm^(2),the thickness of the prepared WC-12Co coating is 55.125μm,and the surface roughness is 5.073μm,the surface of the coating is denser and has a better finish.The comprehensive performance of the thickness and surface roughness of the coating is relatively good.

关 键 词：电火花沉积 WC-12CO 工艺参数优化 灰色关联分析法 

分 类 号：TG174.44[金属学及工艺—金属表面处理]