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通过激光加工在工具钢上制备的Cr3C2相增强W-Cr涂层的制造工艺、微观结构及物理机械性能

Manufacturing Process, Microstructure and Physico-Mechanical Properties of W-Cr Coatings Reinforced by Cr3C2 Phase Produced on Tool Steel through Laser Processing.

作者信息

Bartkowski Dariusz, Bartkowska Aneta

机构信息

Institute of Materials Technology, Faculty of Mechanical Engineering, Poznan University of Technology, ul. Piotrowo 3, 61-138 Poznan, Poland.

Institute of Materials Science and Engineering, Faculty of Materials Engineering and Technical Physics, Poznan University of Technology, ul. Jana Pawła II 24, 61-138 Poznan, Poland.

出版信息

Materials (Basel). 2023 Jun 23;16(13):4542. doi: 10.3390/ma16134542.

DOI:10.3390/ma16134542
PMID:37444858
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10343019/
Abstract

This paper presents study results of laser processing of W-Cr, WCr/CrC and CrC pre-coats applied on steel substrate in the form of paste. For this study, production parameters were selected to obtain the greatest possible durability of final coatings. Laser processing was carried out using a diode laser machine with a rated power of 3 kW. The laser beam scanning speed was constant at 3 m/min, but variable laser beam powers were used: 600 W, 900 W and 1200 W. Multiple laser tracks with 60% overlapping were used. After remelting the pre-coat with a steel substrate, new coatings were obtained. Following the experiment, microstructure, microhardness, wear, corrosion resistance and chemical composition were investigated. It was found that it is possible to produce W-Cr/CrC coatings through laser processing. These coatings do not have the characteristics of a composite coating; however, increasing the reinforcing phase in the pre-coat positively affects the wear resistance and microhardness. The addition of a reinforcing phase was found to lead to a microhardness of about 750-890 HV01 for 25% and 75% CrC, respectively, in comparison to coating without CrC. The wear resistance of coatings reinforced by chromium carbide improved more than twofold in reference to the W-Cr coating.

摘要

本文介绍了以膏状形式涂覆在钢基体上的W-Cr、WCr/CrC和CrC预涂层的激光加工研究结果。在本研究中，选择生产参数以获得最终涂层尽可能高的耐久性。使用额定功率为3kW的二极管激光机进行激光加工。激光束扫描速度恒定为3m/min，但使用了可变的激光束功率：600W、900W和1200W。使用重叠率为60%的多条激光轨迹。在用钢基体重熔预涂层后，获得了新的涂层。实验后，对微观结构、显微硬度、磨损、耐腐蚀性和化学成分进行了研究。结果发现，通过激光加工可以制备W-Cr/CrC涂层。这些涂层不具有复合涂层的特性；然而，增加预涂层中的增强相会对耐磨性和显微硬度产生积极影响。与不含CrC的涂层相比，发现添加增强相分别使25%和75%CrC的显微硬度达到约750-890 HV01。与W-Cr涂层相比，碳化铬增强涂层的耐磨性提高了两倍多。

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本文引用的文献

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