Abrasive Wear Resistance of Overlay Composite Alloy with Addition of Carbide Powders

概要

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The overall objective of this project is to provide data showing how carbide powder in addition to base alloy powder can be used effectively to increase hardness of overlay alloy and resistance to abrasive wear. An experimental study was performed to examine combinations of base alloy powders and reinforcing powders. The base alloy powders considered were stainless steel, Ni-base alloy, Co-base alloy and high speed steel powder, while reinforcing powders considered were metal-carbide and ceramic powders. The ovelay alloys were produced from base alloy or carbide or ceramic dispersion by plasma transfer arc powder welding. To asess the wear resistance of overlay alloy a rubber wheel abrasion test was performed on its surface. The weight loss due to wear of overlay alloy with addition of reinforcing powder was lower than that of base ovelay alloy only due to the existence of primary carbides and non-fused carbide particles in it. Especially, the abrasive wear resistance of overlay alloy depended on the volume fraction of primary carbides and non-fused carbide particles. The addition of carbide powder, especially Ti-carbide, to high speed steel powder increases effectively the hardness of overlay alloy, and hence increases resistance to abrasive wear of it.
社団法人溶接学会の論文
1993-10-01