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

doi:10.11896/cldb.20010037

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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 S_q 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 R_a 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.

Key words： high speed wire cut electrical discharge machining(HSWEDM) SiC nanofluids SKH-51 high speed steel surface microstructure recast layer surface roughness

Published: 04 June 2021

CLC number:

TG147

Fund:Undergraduate Innovation and Entrepreneurship Training Program of Sichuan University of Science & Engineering (S202010622097, cx2020182).

About author:: Cuixia Guo is an associate professor and master tutor of Sichuan University of Science & Engineering. She is studying for her doctorate at Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology in 2018. Her research interests focus on the fundamental theory & application about the surface modification of WEDM based on nanomaterials. She has published more than 20 journal papers as the first author, applied 8 national invention patents and 4 of them were authorized.
Zhangyong Wu is a director of the Institute of Functional Fluid Applications and Mine Electromechanical Engineering, College of Mechanical and Electrical Engineering, Kunming University of Science and Techno-logy. Born in May 1963, master of mechanical manufacturing and automation and he became a senior engineer in 1996, named professor in 2004. The main research directions are water-based hydraulic transmission technology,electro-hydraulic digital control technology, new hydraulic media, components and systems. In recent years, he has hosted and participated in more than 20 scientific research projects,published more than 50 papers,participated in the compilation of 1 textbook and 1 monograph, won 1 first prize and 2 third prize of Yunnan Science and Technology Progress Award,and obtained invention patent 13, more than 60 patents for utility and utility models.

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	GUO Cuixia
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	XIE Wenling
	ZHANG Jianping
	ZHANG Lianzhi
	ZOU Yinghui

Cite this article:

GUO Cuixia,WU Zhangyong,XIE Wenling, et al. A Comparative Study on Surface Characteristics of HSWEDM Based on SiC Nanofluids and Conventional Emulsions[J]. Materials Reports, 2021, 35(10): 10166-10170.

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http://www.mater-rep.com/EN/10.11896/cldb.20010037 OR http://www.mater-rep.com/EN/Y2021/V35/I10/10166

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