1 Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China 2 Faculty of Mechanical Engineering, Sichuan University of Science & Engineering, Yibin 644000, China
Abstract: The purpose of this study is to investigate the surface performance of high speed wire cut electrical discharge machining(HSWEDM) using SiC nanometer liquid as the working medium. SiC nanofluids were prepared by using a two-step process, which was mixed with emulsion or deionized water as the nanometer working medium, and SKH-51 high speed steel was cut several times on HSWEDM. Microstructure and nanometer surface roughness of the recast layer were evaluated by SEM and AFM. Macro surface roughness was measured by Taylor-Hobson-50 roughness meter, and chemical composition of the surface was detected by EDS. The results show that the nanometer surface roughness Sq of the SiC/emulsion nanometer working fluid and conventional emulsion and SiC/deionized water nanometer working fluid were 64.7 nm, 135 nm and 22.8 nm, respectively. And the thickness of the recast layer was 11 μm, 16 μm and 14 μm, respectively. And the macroscopic surface roughness Ra was 1.464 0 μm, 1.792 3 μm and 1.314 9 μm, respectively. Compared with conventional emulsion processing, the SiC nanometer wo-rking fluid had no obvious trace of electrode wire discharge, but the SiC/deionized water nanometer working fluid had obvious black and white stripes, and the surface finish was not better than that of the SiC/emulsion nanometer working fluid. The surface processed using SiC nanometer working fluid showed no honeycomb, and craters were large and shallow, and microcracks were not significant, and pinholes were fine,between the two,the surface processed by SiC/emulsion nanometer working fluid had finer and fewer pinholes. The results show that the surface quality of HSWEDM was improved by using SiC nanometer liquid as working medium.
郭翠霞, 吴张永, 谢文玲, 张建平, 张莲芝, 邹应辉. 基于SiC纳米工作液和常规乳化液的高速走丝电火花线切割加工表面特性的对比研究[J]. 材料导报, 2021, 35(10): 10166-10170.
GUO Cuixia, WU Zhangyong, XIE Wenling, ZHANG Jianping, ZHANG Lianzhi, ZOU Yinghui. A Comparative Study on Surface Characteristics of HSWEDM Based on SiC Nanofluids and Conventional Emulsions. Materials Reports, 2021, 35(10): 10166-10170.
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2021, Vol. 35 
