钛合金表面激光熔敷Cr13Ni5Si2基金属硅化物涂层组织与耐磨性

Microstructure and Wear Resistance of Laser Clad Cr13Ni5Si2-Based Metal Silicide Coating on Titanium Alloy

摘要:

以Cr-Ni-Si合金粉末为原料、利用激光熔敷技术在钛合金表面上制得了Cr13Ni5Si2基金属硅化物冶金涂层，在于滑动磨损条件下测试了该涂层的耐磨性能。结果表明，激光熔敷Cr13Ni5Si2基金属硅化物涂层组织主要由Cr13Ni5Si2初生树枝品及少量Cr13Ni5Si2／Cr13Ni5Si2共晶组成，涂层在干滑动磨损条件下具有优异的耐磨性能。

Abstract:

A wear resistant Cr13Ni5Si2-based metal silicide coating was fabricated on a substrate of titanium alloy BT20 by laser cladding process of Cr-Ni-Si alloy powders. Wear resistance of the coating was evaluated under block-on-wheel dry sliding wear test conditions at room-temperature. Microstructure of the coating is consisted of Cr13Ni5Si2 primary dendrites and small amount of Cr13Ni5Si2/ Cr3Ni5Si2 eutectics. The laser-clad Cr13Ni5Si2-based coating exhibited an excellent wear resistance under dry sliding wear test conditions.