Abrasive wear of Laser Surface Hardened 9SiCr in Soils

Abrasive wear tests of laser treated 9SiCr blade were conducted using three kinds of abrasives (loam soil, sand soil and clay soil). The parameters of laser treatment (e.g. laser power 1200W, scanning velocity 14mm/s; laser power 1500W, scanning velocity 16mm/s) were optimized to obtain the hard and wear resistant surface on 9SiCr blade. Wear resistances of laser treated 9SiCr blade in three kinds of soils were measured and compared. The wear resistance of laser hardened 9SiCr steel blade was 5 times as high as that of quenched 9SiCr steel blade. The main wear mechanism of laser hardened 9SiCr blade in soil was abrasive wear. By improving the hardness, the wear lifetime of laser hardened 9SiCr blade was prompted.