In order to improve the wear resistance of ordinary carbon steel, adding B(2.5-4.0)%和 Ti、N(0.20-0.40)% in the ordinary low carbon steel, a large number of casting alloy with high hardness boride were obtained. The microstructure of the samples was observed. The XRD analysis was carried out. The results show that: the casting alloy cast microstructure is fine and closely woven, which is composed of ferrite + pearlite +Fe2B. Fe2 B forms a conspicuous reticular along the grain boundary. The ferrite is irregula...