This study aims to systematically investigate the influence of boron (0–3.0 wt % B) on microstructure and abrasive wear characteristics of high chromium based multi-component white cast iron (Hi-Cr MWCI).

As result, the microstructure is mainly composed of martensite matrix and carborides such as M₇(C, B)₃, M₂(C, B), M₂₃(C, B)₆. At low load, B can increase the wear resistance of Hi-Cr MWCI owing to the higher volume fraction of M₂(C, B). However, it reduces the wear resistance of material due to low the fracture toughness of primary M₇C₃ or M₇(C, B)₃ at high load. Therefore it can be concluded that B addition can improve the abrasive wear resistance of Hi-Cr MWCI at low load, but, the opposite tendency will occur at high load.

本研究旨在系统地研究硼 (0–3.0 wt% B) 对高铬基多组分白口铸铁 (Hi-Cr MWCI) 微观结构和磨粒磨损特性的影响。

结果，显微组织主要由马氏体基体和M ₇ (C, B) ₃、M ₂ (C, B)、M ₂₃ (C, B) ₆等碳化物组成。在低负荷下，由于 M ₂ (C, B) 的体积分数较高，B 可以提高 Hi-Cr MWCI 的耐磨性。然而，由于初级M ₇ C ₃或M ₇ (C, B) ₃ 在高负荷下的断裂韧性较低，因此降低了材料的耐磨性。因此可以得出结论，B的添加可以提高Hi-Cr MWCI在低负荷下的耐磨性，但在高负荷下会出现相反的趋势。