Precipitates Generation Mechanism and Surface Quality Improvement for Aluminum Alloy 6061 in Diamond Cutting  

作　　者：王海龙 DENG Wenping 王素娟 WANG Hailong;DENG Wenping;WANG Sujuan(State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment,Guangdong University of Technology,Guangzhou 510006,China;Guangdong Provincial Key Laboratory of Micro-Nano Manufacturing Technology and Equipment,School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment,Guangdong University of Technology,Guangzhou 510006,China [2]Guangdong Provincial Key Laboratory of Micro-Nano Manufacturing Technology and Equipment,School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第1期150-159,共10页武汉理工大学学报（材料科学英文版）

基　　金：Funded by Natural Science Foundation of Guangdong Province,China (No.2017A030313330);Science and Technology Program of Guangzhou (No.201804020040)。

摘　　要：To improve the surface quality for aluminum alloy 6061(Al6061) in ultra-precision machining, we investigated the factors affecting the surface finish in single point diamond turning(SPDT)by studying influence of the precipitates generation of Al6061 on surface integrity and surface roughness.Based on the Johnson-Mehl-Avrami solid phase transformation kinetics equation, theoretical and experimental studies were conducted to build the relationship between the aging condition and the type, size and number of the precipitates for Al6061. Diamond cutting experiments were conducted to machine Al6061 samples under different aging conditions. The experimental results show that, the protruding on the chip surface is mainly Mg_(2)Si and the scratches on the machined surface mostly come from the iron-containing phase(α-, β-AlFeSi).Moreover, the generated Mg_(2)Si and α-, β-AlFeSi affect the surface integrity and the diamond turned surface roughness. Especially, the achieved surface roughness in SPDT is consistent with the variation of the number of AlFeSi and Mg_(2)Si with the medium size(more than 1 μm and less than 2 μm) in Al6061.

关 键 词：Al6061 PRECIPITATES aging treatment diamond cutting surface roughness 

分 类 号：TG506[金属学及工艺—金属切削加工及机床]