Effect of Additive Manufacturing Thickness on Microstructure and Properties of DG09 Welding Wire Wear-resistant Layer

Abstract In order to study the influence of additive manufacturing thickness of coal mining machine-guide slide shoe on the microstructure and properties of wear-resistant layers, four kinds of wear-resistant layers with different thicknesses were mainly manufactured in this paper. The influence of the cladding thickness on wear resistance was further clarified by analyzing the metallographic structure, hardness, and wear resistance of the material. The experimental results show that the thickness of the wear-resistant layer has little effect on its microstructure and wear resistance. Hardness has a great influence on wear resistance. The higher the thickness of the wear-resistant layer is, the wider the wear width of the sample is. The main wear mechanism of produced cladding is abrasive wear accompanied by oxidation wear with a certain degree of spalling wear. The experimental results have a key role in the overall use performance of the coal mining machine.