Abstract Low alloy abrasion resistant steel reinforced with self-generated TiC particles was developed to improve its wear performance without increasing its hardness. The solidification experiments were performed to study the effect of mass fraction of Ti and solidification rates on the size, content and distribution of micron-sized TiC particles. The sliding wear behavior of TiC-reinforced steels with different mass fractions of Ti that are produced at different solidification rates under different applied loads was studied using a dry sliding wear test machine. The results showed that the microstructure of the TiC-reinforced steels consisted of a martensite/bainite matrix and micron-sized TiC particles. With increasing of Ti mass fraction and the solidification rate, the number of the TiC particles increases. Under different applied loads, TiC-reinforced steels produced at a solidification rate of 3 °C/min exhibited the best sliding wear performance. The wear morphology and EDS maps indicated that the main wear mechanism of dry sliding wear for TiC-reinforced steels is oxidation wear and abrasive wear. The cross-section morphology of the wear surfaces revealed that the micron-sized particles can protect the matrix from wear and enhance the resistance of matrix to deformation.

中文翻译：

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TiC颗粒增强低合金耐磨钢的凝固和滑动磨损行为

摘要 为了在不增加硬度的情况下提高耐磨性能，开发了自生TiC颗粒增强的低合金耐磨钢。进行凝固实验以研究 Ti 的质量分数和凝固速率对微米级 TiC 颗粒的尺寸、含量和分布的影响。使用干滑动磨损试验机研究了在不同凝固速率下生产的不同质量分数 TiC 增强钢在不同施加载荷下的滑动磨损行为。结果表明，TiC 增强钢的显微组织由马氏体/贝氏体基体和微米级 TiC 颗粒组成。随着Ti质量分数和凝固速率的增加，TiC颗粒的数量增加。在不同的外加载荷下，以 3°C/min 的凝固速率生产的 TiC 增强钢表现出最好的滑动磨损性能。磨损形貌和EDS图表明，TiC增强钢干滑动磨损的主要磨损机制是氧化磨损和磨粒磨损。磨损表面的横截面形貌表明，微米级颗粒可以保护基体免受磨损并增强基体的抗变形能力。