Microstructure and abrasion wear behavior of Ni-based laser cladding alloy layer at high temperature^①

来源期刊：中南大学学报(英文版)2005年第4期

论文作者：刘勇 刘素芹 王顺兴

文章页码：403 - 405

Key words：Ni-based laser cladding layer; microstructure; abrasion wear behavior; high temperature

Abstract: Ni-based alloy coating on 21-4-N heat-resistant steel was prepared using CO2laser, and the high-temper-ature abrasion wear was tested. The microstructure of this cladding layer and its abrasion wear behavior at high tem-perature by changing compositions and temperatures were investigated by means of optical microscope and scanning electron microscope. Among the three compositions of cladding layer, i.e. Ni21+20%WC+0.5%CeO₂, Ni25+ 20%WC+0.5%CeO₂and Ni60+20%WC+0.5%CeO₂, the experimental results show that Ni21+20%WC+ 0.5%CeO₂cladding layer is made up of finer grains, and presents the best abrasion wear behavior at high tempera-ture. The wear pattern of laser cladding layer is mainly grain abrasion at lower temperature, and it would be changed to adhesive abrasion and oxide abrasion at higher temperature.