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激光淬火后试样表面得到马氏体、贝氏体和残余奥氏体的混合组织,屈服强度得到不同程度的提高,但韧性随组织和亚结构的变化出现较大差别。激光淬火处理铁基粉末冶金材料滑动摩擦体系是在氧化磨损和塑性变形导致的多种磨损机理共同作用下的材料损耗过程。磨痕形貌和磨损率分析结果表明磨损量主要取决于试样表面氧化膜生成及损耗的速度,因此,可以认为其占主导地位的磨损机制为氧化磨损。本文分析了影响铁基粉末冶金材料摩擦磨损的主要因素。
After laser quenching, the mixed microstructure of martensite, bainite and retained austenite was obtained on the specimen surface. The yield strength was improved to some extent. However, the toughness changed greatly with the change of microstructure and substructure. Laser quenching iron-based powder metallurgy material sliding friction system is a wear-and-oxidation plastic deformation caused by a variety of wear mechanisms under the action of the material loss process. Wear scar morphology and wear rate analysis results show that the amount of wear depends mainly on the sample surface oxide film formation and loss rate, therefore, can be considered the dominant wear mechanism for oxidation wear. This article analyzes the main factors affecting the friction and wear of iron-based powder metallurgy materials.