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电火花沉积工艺在H13钢表面制备Mo涂层及其性能研究

Preparation and Properties of Mo Coating on H13 Steel by Electro Spark Deposition Process.

作者信息

Wang Wenquan, Du Ming, Zhang Xinge, Luan Chengqun, Tian Yingtao

机构信息

Key Laboratory of Automobile Materials, School of Materials Science and Engineering, Jilin University, Changchun 130025, China.

Department of Engineering, Lancaster University, Bailring, Lancaster LA1 4YW, UK.

出版信息

Materials (Basel). 2021 Jul 1;14(13):3700. doi: 10.3390/ma14133700.

DOI:10.3390/ma14133700
PMID:34279271
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8269851/
Abstract

H13 steel is often damaged by wear, erosion, and thermal fatigue. It is one of the essential methods to improve the service life of H13 steel by preparing a coating on it. Due to the advantages of high melting point, good wear, and corrosion resistance of Mo, Mo coating was fabricated on H13 steel by electro spark deposition (ESD) process in this study. The influences of the depositing parameters (deposition power, discharge frequency, and specific deposition time) on the roughness of the coating, thickness, and properties were investigated in detail. The optimized depositing parameters were obtained by comparing roughness, thickness, and crack performance of the coating. The results show that the cross-section of the coating mainly consisted of strengthening zone and transition zone. Metallurgical bonding was formed between the coating and substrate. The Mo coating mainly consisted of FeMo, Fe-Cr, FeMo, and FeMo cemented carbide phases, and an amorphous phase. The Mo coating had better microhardness, wear, and corrosion resistance than substrate, which could significantly improve the service life of the H13 steel.

摘要

H13钢常因磨损、冲蚀和热疲劳而受损。在H13钢表面制备涂层是提高其使用寿命的重要方法之一。鉴于钼具有熔点高、耐磨性和耐腐蚀性好等优点，本研究采用电火花沉积（ESD）工艺在H13钢上制备了钼涂层。详细研究了沉积参数（沉积功率、放电频率和比沉积时间）对涂层粗糙度、厚度及性能的影响。通过比较涂层的粗糙度、厚度和裂纹性能，得出了优化的沉积参数。结果表明，涂层横截面主要由强化区和过渡区组成。涂层与基体之间形成了冶金结合。钼涂层主要由FeMo、Fe-Cr、FeMo和FeMo硬质合金相以及非晶相组成。钼涂层的显微硬度、耐磨性和耐腐蚀性均优于基体，可显著提高H13钢的使用寿命。

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引用本文的文献

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