Articles
  • Investigation of microstructures and properties of HVOF sprayed WC-10Co-4Cr coatings on high-hardness M42 steel

  • Xiaogang Lua,*,†, Zhenghua Linb,†, Peng Pana, Yunbo Chena, Lingli Zuoa and Chunming Lia

  • aState Key Laboratory of Advanced Forming Technology and Equipment, Beijing National Innovation Institute of Lightweight Ltd, Beijing 100083, China
    bHengda New Materials Co., Ltd, Putian, Fujian, 351142, China

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

WC-10Co-4Cr have been well known material with attractive corrosion resistance and excellent hardness in the WC-based coatings. To widen the application of the WC-10Co-4Cr coatings deposited on high-hardness metal cutting tools, the investigation of its preparation parameters and properties are required. In this study, dense micro-structured WC-10Co-4Cr coatings deposited on high-hardness M42 steel were performed with high velocity oxy-fuel (HVOF) spray process. The prepared coatings exhibit excellent properties by improving the size of spray gun and injecting high flow nitrogen into the flame stream. A maximum micro-hardness of 1353.3 HV0.3 was achieved. In addition, the frictional properties of uncoated M42 steel and the WC-10Co-4Cr coating were comparably studied under dry sliding wear tests. A low friction coefficient of 0.34-0.37 was achieved for WC-10Co-4Cr coating, showing a 57% decrease than that of uncoated M42 steel. X-ray diffractometry was used to identify the phase composition, and scanning electron microscopy was adopted to characterize the microstructure of deposited coatings and worn-out surfaces


Keywords: M42 steel, WC-10Co-4Cr coatings, Microstructure, Micro-hardness, Frictional properties

This Article

  • 2021; 22(6): 649-654

    Published on Dec 31, 2021

  • 10.36410/jcpr.2021.22.6.649
  • Received on May 17, 2021
  • Revised on Sep 1, 2021
  • Accepted on Sep 11, 2021

Correspondence to

  • Xiaogang Lu

  • tate Key Laboratory of Advanced Forming Technology and Equipment, Beijing National Innovation Institute of Lightweight Ltd, Beijing 100083, China
    Tel : +86-10-82415063 Fax: +86-10-82415063

  • E-mail: 13121200806@163.com