The evaluation of machining performances and recast layer properties of AISI H13 steel processed by tungsten carbide powder mixed EDM process in the semi-finishing process

IF 2.7 4区工程技术 Q2 ENGINEERING, MANUFACTURING Machining Science and Technology Pub Date : 2022-05-04 DOI:10.1080/10910344.2022.2129983

Van Tao Le

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引用次数: 4

Abstract

Abstract In the literature, investigations on the electrical discharge machining (EDM) process with Tungsten carbide powder mixed into dielectric fluid, also called PMEDM, are still limited. In this study, machining performances of PMEDM, including material removal rate (MRR) of AISI H13 steel and tool wear rate (TWR), were investigated in the semi-finishing process. Thereafter, recast layer properties of AISI H13 steel, including composition and content of chemical elements, recast layer thickness (RLT), and acreage percentage of micro-cracks on surfaces (APCS), were evaluated and discussed. Quantitative methods of MRR, TWR, RLT, APCS, and the composition and content of chemical elements on machined surfaces have been proposed. The results revealed that machining performances and recast layer properties were influenced by peak current (Ip), pulse on time (Ton), and powder concentration (Cp). MRR and TWR have been changed in an uptrend when Ip, Ton, and Cp increased. The chemical composition of machined surfaces was modified. APCS and RLT formed by PMEDM are notably decreased as compared with EDM, with a reduction of 41.093% and 48.982%, respectively. In addition, the changing trend of machining performances and recast layer properties were also explored.

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AISI H13钢电火花半精加工性能及重铸层性能的评价

摘要在文献中，对将碳化钨粉末混合到电介质流体（也称为PMEDM）中的电火花加工（EDM）工艺的研究仍然有限。在本研究中，研究了PMEDM在半精加工过程中的加工性能，包括AISI H13钢的材料去除率（MRR）和刀具磨损率（TWR）。随后，对AISI H13钢的重铸层性能进行了评估和讨论，包括化学元素的组成和含量、重铸层厚度（RLT）和表面微裂纹面积百分比（APCS）。提出了MRR、TWR、RLT、APCS的定量方法以及机械加工表面化学元素的组成和含量。结果表明，峰值电流（Ip）、脉冲接通时间（Ton）和粉末浓度（Cp）对加工性能和重铸层性能有影响。当Ip、Ton和Cp增加时，MRR和TWR呈上升趋势。对机械加工表面的化学成分进行了改性。PMEDM形成的APCS和RLT与EDM相比显著降低，分别降低了41.093%和48.982%。此外，还探讨了机械加工性能和重铸层性能的变化趋势。

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来源期刊

Machining Science and Technology 工程技术-材料科学：综合

CiteScore

5.70

自引率

3.70%

发文量

审稿时长

6 months

期刊介绍： Machining Science and Technology publishes original scientific and technical papers and review articles on topics related to traditional and nontraditional machining processes performed on all materials—metals and advanced alloys, polymers, ceramics, composites, and biomaterials. Topics covered include: -machining performance of all materials, including lightweight materials- coated and special cutting tools: design and machining performance evaluation- predictive models for machining performance and optimization, including machining dynamics- measurement and analysis of machined surfaces- sustainable machining: dry, near-dry, or Minimum Quantity Lubrication (MQL) and cryogenic machining processes precision and micro/nano machining- design and implementation of in-process sensors for monitoring and control of machining performance- surface integrity in machining processes, including detection and characterization of machining damage- new and advanced abrasive machining processes: design and performance analysis- cutting fluids and special coolants/lubricants- nontraditional and hybrid machining processes, including EDM, ECM, laser and plasma-assisted machining, waterjet and abrasive waterjet machining