Unveiling the effect of electron beam shock on the microstructure and wear resistance of Cr12MoV steel

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2024-05-30 DOI:10.1016/j.vacuum.2024.113347

Rong Wang, Zhenfei Song, Deqiang Wei, Xinkai Li, Jinjie Song, Zhenzhao Mo, Yitao Weng, Fengtao Yang

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Abstract

Enhancing wear resistance is the core factor that prolonged the life of the Cr12MoV mold and elevates the quality of the components produced. Hence, Cr12MoV mold steel was shocked by scanning electron beam (SEB) to improve wear resistance. Results revealed that the segregation eutectic carbides in the surface structure of Cr12MoV steel were dissolved during the shock process of various beam electron beams, and the small particles of carbides produced are helpful in reducing wear. With an energy density of 20 J/mm², surface roughness of Cr12MoV steel decreases from 2.9 μm to 1.2 μm, the friction coefficient decreases from 0.85 to 0.52. Additionally, the wear capacity also decreases from 0.036 mm³ to 0.011 mm³, and surface wear resistance increases by over 3 times. Grain refinement-induced surface hardening is the primary cause underlying performance improvement. This study provides ideas for improving the surface quality of Cr12MoV steel.

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揭示电子束冲击对 Cr12MoV 钢微观结构和耐磨性的影响

提高耐磨性是延长 Cr12MoV 模具寿命和提高部件质量的核心因素。因此，对 Cr12MoV 模具钢进行了扫描电子束（SEB）冲击，以提高其耐磨性。结果表明，在各种电子束的冲击过程中，Cr12MoV 钢表面结构中的偏析共晶碳化物被溶解，产生的小颗粒碳化物有助于降低磨损。能量密度为 20 J/mm2 时，Cr12MoV 钢的表面粗糙度从 2.9 μm 降至 1.2 μm，摩擦系数从 0.85 降至 0.52。此外，耐磨能力也从 0.036 mm3 降至 0.011 mm3，表面耐磨性增加了 3 倍多。晶粒细化引起的表面硬化是性能改善的主要原因。这项研究为改善 Cr12MoV 钢的表面质量提供了思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.