Fe-0.03Te-0.3Pb-0.9Mn易切削不锈钢润滑滚动磨损机理研究

采用润滑滚动磨损实验测试Fe-0.03Te-0.3Pb-0.9Mn易切削不锈钢的表面摩擦磨损特性。比较不同磨损时间球珠作用下合金表面磨损形貌、体系硬度、摩擦因数和磨损体积的差异,并对其润滑滚动磨损机理进行深入研究。结果表明:磨损启动期,合金表面磨损性能相对稳定,在MnS和Pb等易切削相交互作用下,合金表面犁削底部开始产生裂纹;磨损稳定期,合金表面性能逐渐变化,犁削底部裂纹持续生长,交织的裂纹开始产生片状或块状凸起物;磨损失效期,合金表面润滑膜和剥落物大量脱落,剥落物形成磨料磨损,犁削逐渐贯通消失,合金表面体系相结构快速瓦解。

Lubricated Rolling Wear Mechanism Study on Fe-0.03Te-0.3Pb-0.9Mn Free-cutting Stainless Steel

The friction and wear characteristics of Fe-0.03Te-0.3Pb-0.9Mn free-cutting stainless steel were investigated using a lubricated rolling wear testing apparatus.The wear morphology,hardness, friction coefficient and wear volume of alloy surface were compared in different wear time,its mecha-nism of lubricated rolling wear was studied further.The results show that,at the beginning of wear, the performance of alloy surface wear is relatively stable,under the interaction of free-cutting phase, such as MnS and Pb,that cracks occur at the alloy surface plough bottom;When the wear is stable, the performance of alloy surface changed gradually,the cracks of plough bottom continue growing, interweaved cracks begin to generate flake or block convex parts;When the wear is over,the alloy surface lubrication film and exfoliation numerous are flaking off,exfoliation formed abrasive wear, plough disappeared step by step,the alloy surface system is collapsed rapidly.