Fast removal of soft phases (e.g., pearlite and ferrite) in the iron matrix limits the wear life of high-Cr white irons. To address this shortcoming, the authors successfully produced fine networks of M₆C carbide in a high-Cr white iron through extensive thermodynamic calculations. Fishbone-like networks of M₆C carbides were observed with an optical microscope. It was experimentally determined that such carbide networks protected the soft matrix and increased the overall hardness. Additionally, electron backscattered diffraction was conducted, which showed that the alloy contained phases of M₇C₃, M₆C, ferrite, and retained austenite. Solidification sequence was determined by correlating the thermodynamic equilibrium calculation results with the size and distribution of each phase. A dry sand/rubber wheel apparatus following ASTM standard G65 Procedure A was utilized to assess the abrasive wear performance of the developed alloy. Results showed that the volume loss of the developed material was 25 pct less than that of conventional high-Cr white irons. Wear scars were investigated using a scanning electron microscope, and the improved wear resistance was attributed to the “buffer” effect and plastic deformation of the introduced M₆C carbide networks.

铁基体中软相（例如珠光体和铁素体）的快速去除限制了高铬白铁的磨损寿命。为了解决这个缺点，作者通过大量的热力学计算成功地在高铬白铁中产生了M ₆ C碳化物的精细网络。用光学显微镜观察到鱼骨状的M ₆ C碳化物网络。实验确定这种碳化物网络可以保护软质基质并提高整体硬度。另外，进行了电子背散射衍射，结果表明该合金含有M ₇ C ₃，M _6相。C，铁素体和残留奥氏体。通过将热力学平衡计算结果与每个相的大小和分布相关联来确定固化顺序。遵循ASTM标准G65程序A的干砂/橡胶轮设备用于评估已开发合金的磨料磨损性能。结果表明，与传统的高铬白铁相比，开发材料的体积损失小25％。使用扫描电子显微镜研究了磨损痕迹，而改进的耐磨性归因于引入的M ₆ C碳化物网络的“缓冲”效应和塑性变形。