Microstructure and Tribological Properties of Fe-Cr-B-Si-based Alloy Coating on the Surface of Scraper Conveyor Middle Trough NM450

Abstract

This paper aims to develop a surface modification process to improve the surface properties of the middle trough. The coatings were prepared by plasma cladding with Fe-Cr-B-Si-based alloy powders (Ig 6 and Ig7). The organizational structure and micro-hardness of the coatings were analyzed by laboratory equipments. The friction and wear tests were performed to investigate the friction-wear properties of middle trough. The coatings have higher hardness and good friction-wear properties than the substrate. The hardness and friction wear properties of the coating with Ig7 powder are better than those with Ig6 powder. The experimental results show that the surface properties of the middle trough are improved by Fe-Cr-B-Si-based alloy coating, which can improve the middle trough service life. The plasma cladding can be widely used in the surface-modification of middle trough to reduce the waste of resources.

Keywords

plasma cladding / coating / NM450 substrate / alloy powders / friction/wear / micro-structure

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