一种改善高碳铬轴承钢强韧性匹配的热处理方法

本发明属于钢铁材料热处理领域，特别是一种改善高碳铬轴承钢强韧性匹配的热处理方法，适用于改善传统高碳铬轴承钢组织和强韧性匹配不佳的问题，使高碳铬轴承钢保持较高强韧性水平。本发明方法为：在传统的单阶淬火热处理工艺中添加两道分阶淬火工序，并对其温度和时间进行控制，从而调节高碳铬轴承钢淬火组织中各相的比例和相变次序，进而通过复合相组成改善高碳铬轴承钢强韧性匹配关系，使其达到兼具高硬度、高强度和高韧性的目的。该方法简单，操作易于实现，效果明显，且性能可调范围宽，无需开发新设备，适用范围广。

This invention falls within the field of heat treatment for iron and steel materials, and specifically relates to a heat treatment method for improving the strength-toughness matching of high-carbon chromium bearing steel. This method is designed to address the problem of poor microstructure and strength-toughness matching in conventional high-carbon chromium bearing steels, thereby enabling such steels to maintain a high level of strength and toughness. The specific steps of the method are as follows: two stepped quenching procedures are added to the traditional single-stage quenching heat treatment process, with their temperatures and holding times strictly controlled. This allows for the adjustment of the phase proportion and phase transformation sequence in the quenched microstructure of high-carbon chromium bearing steel. By optimizing the composite phase composition, the strength-toughness matching of the high-carbon chromium bearing steel is improved, ultimately achieving the goal of combining high hardness, high strength and high toughness. This method features simple operation, easy implementability, remarkable treatment effects, a wide adjustable range of mechanical properties, requires no new equipment development, and has a broad application scope.