The wear interaction of cementite and pearlite in the white cast iron (WCI) was investigated using the two-body abrasive wear test under contact loads of 20, 35, and 50 N. The wear behavior, wear surface morphology, sub-surface structure, and wear resistance were evaluated using X-ray diffraction, microhardness testing, and nano-indentation. The results indicated that when the Cr content was increased from 0 to 4 wt%, there was a significant increase in the microhardness (H) and elasticity modulus (E) of the cementite. This yielded a 15.91%- and 23.6%-reduction in the degree of wear resistance and surface roughness, respectively. Moreover, no spalling and breaking of cementite was observed with increasing Cr content during the wear process, indicating improved wear resistance of the bulk cementite. In addition, the hard phase (cementite) and tough matrix (pearlite) composite structure exhibited a good protective and supporting effect. Thus, it was concluded that the interaction mechanism of the wear phase contributed to the reduction of the wear weight loss of the composite during the wear process. The contribution of the interaction between the hard wear-resistant phase and the tough phase in WCI to the wear resistance decreased with increasing hardness of the pearlite matrix.

使用 20、35 和 50 N 接触载荷下的双体磨粒磨损试验研究了白口铸铁 (WCI) 中渗碳体和珠光体的磨损相互作用。磨损行为、磨损表面形态、亚表面结构、使用 X 射线衍射、显微硬度测试和纳米压痕来评估耐磨性。结果表明，当Cr含量从0增加到4wt%时，显微硬度（H）和弹性模量（E) 的渗碳体。这分别使耐磨性和表面粗糙度降低了 15.91% 和 23.6%。此外，在磨损过程中，随着 Cr 含量的增加，没有观察到渗碳体的剥落和断裂，表明块状渗碳体的耐磨性提高。此外，硬相（渗碳体）和坚韧基体（珠光体）复合结构表现出良好的保护和支撑作用。因此，可以得出结论，磨损阶段的相互作用机制有助于降低复合材料在磨损过程中的磨损重量损失。随着珠光体基体硬度的增加，WCI 中硬耐磨相和韧性相之间的相互作用对耐磨性的贡献降低。