基于改进TOPSIS的铜合金表面铸渗Al_2O_3工艺优化  

Optimization of Surface Casting and Al_2O_3 Process for Copper Alloy Based on Improved TOPSIS

作　　者：王艳[1] 张晓帆[2] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]武汉理工大学机电工程学院,湖北武汉430070

出　　处：《徐州工程学院学报（自然科学版）》2018年第1期20-26,共7页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：湖北省自然科学基金项目(2016CFB187)

摘　　要：运用正交试验与改进的TOPSIS相结合对铝青铜表面铸渗Al2O3工艺参数进行了综合工艺目标优化.以浇注温度、真空度、预热温度、涂层厚度为优化工艺参数,以渗层的表面硬度、结合强度、相对磨损率、腐蚀质量为多工艺优化目标,首先进行正交试验获取试验数据,然后借鉴TOPSIS法多属性问题决策原理对各试验方案进行评价.在评价过程中,将单工艺目标视为属性指标,多工艺优化目标表示为单工艺优化目标权重之和.针对传统TOPSIS法中距离计算采用的是欧式公式,忽略了属性指标之间的相关性问题,采用马氏距离对TOPSIS法中距离计算方法进行了改进.优化结果为:浇注温度1 200℃、真空度0.04 MPa、预热温度180℃、涂层厚度3mm.The orthogonal design and the improved TOPSIS were used to optimize the process parameters of the surface castings of aluminum bronze.The surface hardness,bonding strength,relative wear rate and corrosion quality of the infiltration layer were optimized by the pouring temperature,the vacuum degree,the preheating temperature and the coating thickness.The experimental data were obtained by orthogonal test,Then,the evaluation scheme of TOPSIS method is used to evaluate the experimental scheme.In the process of evaluation,the single process goal is regarded as the attribute index,and the multi-process optimization target is expressed as the sum of the weights of the single process optimization target.For the traditional TOPSIS method,the distance formula is adopted,and the correlation between the attribute indexes is neglected.The distance calculation method of TOPSIS method is improved by Mahalanobis distance.The optimum results were as follows:casting temperature 1 200℃,vacuum 0.04 MPa,preheating temperature 180 ℃,coating thickness 3 mm.

关 键 词：铜合金 铸渗工艺 优化 TOPSIS 马氏距离 

分 类 号：TG166.2[金属学及工艺—热处理]