Effect of Carbon Content and Elements Mo and V on the Microstructure and Properties of Stainless Steel Powder Surfacing Layer

Taixu Xu,Zhijun He,Xiao Han,Jihui Liu,Chongyi Wei,Nan Lü

doi:10.3390/coatings10040371

Taixu Xu, Zhijun He + Show 4 more

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https://doi.org/10.3390/coatings10040371

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Abstract

This study evaluated the effect of an increase in carbon content and the presence of the elements Mo and V on the microstructure and properties of the surfacing layer of stainless steel powder for knives and scissors production. Various types of high-quality stainless steel powder (5Cr13, 8Cr13, and 8Cr13MoV) were deposited on the surface of low-grade stainless steel used to produce knives and scissors (2Cr13). The microstructure, comprehensive hardness, wear resistance, impact toughness, and corrosion resistance of the stainless steel powder surfacing layers were tested and analyzed. Results indicate that the increase in carbon content and the presence of Mo and V improve the comprehensive hardness and wear resistance of the stainless steel powder surfacing layer, and both exert the superposition effect. However, the increase in carbon content and the presence of Mo and V slightly influence the impact toughness of the surfacing layer. In addition, the increase in carbon content significantly reduces the corrosion resistance of the surfacing layer. This adverse effect is reduced when Mo and V exist. Other advantages of the presence of Mo and V in the stainless steel powder surfacing layer include the refinement of grain size, reduction of carbide particle size, and improvement of the metallurgical bonding of the surfacing layer and the matrix.

Highlights

Plasma surfacing is one of the widely used methods for steel surface strengthening [1,2,3]owing to several advantages, including the wide variety of surfacing materials, low dilution rate, and high production efficiency [4,5]
Compared with thermal spraying and chemical deposition, plasma surfacing increases the bonding force of the surfacing layer formed with the matrix, resulting in metallurgical bonding and a thickness larger than that obtained using other methods [6,7,8,9,10,11]
This study mainly aims to explore the microstructure and properties of the surfacing layer of high-quality stainless steel powder for knife and scissors production, to identify excellent plasma surfacing materials that can be used to make the edge of knives and scissors, and to provide a theoretical basis for further research

Summary

Introduction

Plasma surfacing is one of the widely used methods for steel surface strengthening [1,2,3]. Owing to several advantages, including the wide variety of surfacing materials, low dilution rate, and high production efficiency [4,5]. Numerous studies have selected hard alloy powders as the surfacing material, including iron-based, cobalt-based, and nickel-based powders [12,13,14]. The obtained surfacing layer exhibits high hardness, good wear resistance, and corrosion resistance, which can effectively strengthen the comprehensive performance of the matrix surface [15,16,17,18,19]. Studies are rarely reported on the application of high-quality stainless steel powder as the surfacing material for knife and scissors production

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