Microstructure and Grain Abrasion Properties of Cr₃C₂-NiCr Coating Prepared by Laser Cladding Method

Abstract:

Cr₃C₂-NiCr has high quality of wear resistant properties and is widely used in abrasive environment. In this paper, Cr₃C₂-NiCr coating was prepared on 45 steel by laser cladding technology. Analysis and research of the coatings were achieved by SEM and XRD to determine the main component and the different region on coatings. The hardness and the element component were investigated by micro-hardness tester and EDS. Abrasion tests were performed to contrast the wear resistance of two materials. The results indicate that the hardness of the coatings is nearly 3 times as the substrate. The coatings are well combined with the substrate and the phase of Cr₃C₂ has a large proportion in the coatings. Abrasion tests show that the average of wear rate on substrate is 5.2 times as the coatings.

• Periodical: Applied Mechanics and Materials (Volumes 271-272)
• Pages: 3-7
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.271-272.3
• Online since: December 2012
• Authors: Long Wei, Zong De Liu, Xin Zhi Li, Ming Ming Yuan, Cheng Yuan Zhong
• Keywords: Cr₃C₂/NiCr Coating, Laser Cladding, Microstructure, Wear Rate

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