| 引用本文: | 曹熙,王文健,刘启跃,朱旻昊.激光离散淬火对轮轨材料磨损与损伤性能的影响[J].中国表面工程,2016,29(5):72~79 |
| CAO Xi,WANG Wen-jian,LIU Qi-yue,ZHU Min-hao.Effects of Laser Dispersed Quenching on Wear and Damage Performances of Wheel/Rail Materials[J].China Surface Engineering,2016,29(5):72~79 |
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| 摘要: |
| 在MJP-30A型滚动接触疲劳试验机上进行激光离散淬火处理前后的轮轨试样的摩擦磨损试验，研究了激光离散淬火处理对轮轨材料的磨损与损伤性能的影响。结果表明：经激光离散淬火后得到致密的马氏体，对轮轨材料的表面硬度具有明显的增强作用，车轮和钢轨试样的表面硬度分别提高了约191.1%和214.5%；轮轨试样经激光离散淬火处理能显著提高轮轨材料的耐磨性，对均经处理的轮轨材料进行实验，发现车轮试样磨损率降低约20.5%，钢轨试样降低约21.9%；而单一处理轮轨试样能大幅降低处理试样的磨损，但其对摩副的磨损有小幅增加；未经处理轮轨试样表面损伤严重，主要表现为剥落损伤；激光离散淬火处理后轮轨试样表面损伤减轻，以小块剥落为主要的磨损形式；淬火区之间的基体表面以剥落损伤为主并伴随一定的疲劳磨损。激光离散淬火处理后轮轨材料组织的抗变形能力得到大幅提高，且淬火区能抑制基体材料的塑性变形。 |
| 关键词: 激光离散淬火 轮轨材料 磨损 损伤 塑性变形 |
| DOI：10.11933/j.issn.1007-9289.2016.05.009 |
| 分类号: |
| 基金项目:四川省科技支撑计划项目（2014GZ0009-2）；国家重点研发计划项目（2016YFB1102601）；国家自然科学基金（51475393） |
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| Effects of Laser Dispersed Quenching on Wear and Damage Performances of Wheel/Rail Materials |
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CAO Xi, WANG Wen-jian, LIU Qi-yue, ZHU Min-hao
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Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031
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| Abstract: |
| The wear and damage performances of wheel/rail materials with and without laser dispersed quenching (LDQ) were investigated by using a MJP-30A rolling contact fatigue testing apparatus. Results show that the uniform and dense martensite structure is obtained for the wheel/rail specimens after LDQ and the surface hardness of wheel and rail specimens significantly increases. The increase rate of the wheel and rail specimens is about 191.1% and 214.5%, respectively. The surface wear resistance of the wheel/rail materials is obviously improved by LDQ technology. The wear rate of the treated wheel and rail specimens decreases by 20.5% and 21.9%, respectively. The wear rate of the treated wheel or rail specimen is reduced significantly, however, the wear of the coupled one without LDQ slightly increases. Severe spalling damage occurs on the surface of untreated wheel/rail specimens. The surface damage of treated wheel/rail specimens is relatively slight and the dominant form of wear is small spalling. The spalling accompanying with fatigue wear is dominant in the substrate region between two LDQ regions. LDQ can effectively improve the microstructure of wheel/rail materials and the plastic deformation resistance. Meanwhile, LDQ region inhibits the plastic deformation of adjacent substrate region. |
| Key words: laser dispersed quenching wheel/rail materials wear damage plastic deformation |
