| 摘要: |
| 在MMS?1G高温高速摩擦试验机上进行M2高速钢的高速干滑动摩擦磨损试验。用热电偶测量并计算摩擦面的摩擦温度，用XRD方法分析磨损前后试样摩擦面的合金相组成。利用SEM观察并分析摩擦面磨损形貌及磨损机理。结果表明：M2高速钢在高速干摩擦条件下，随着速度的增加，摩擦因数降低，磨损率达到最大值后降低。当摩擦热累积达到一定值后，摩擦表面产生严重塑性变形甚至形成润滑薄膜，同时伴有新相析出。 |
| 关键词: M2高速钢 高速干滑动 摩擦磨损性能 摩擦热 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金项目(50375046) |
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| Friction and Wear Characteristics of M2 High Speed Steel at High Speed Dry Sliding Condition |
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LUO Xia，ZHANG Yong-zhen，CHEN Yue，TIE Xi-shun
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School of Materials Science & Engineering, Henan University of Science & Technology, Luoyang 471003, China
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| Abstract: |
| The friction and wear Characteristics of M2 steel (dry sliding against GCr15 steel) were investigated on the MMS-1G high speed and high temperature wear tester under the conditions of velocity(3 m/s ~ 50 m/s )and contact load (50 N~250 N). Friction temperatures of pin were recorded by NiCr-NiSi thermoelectric couple. The various wear micromechanisms and tribo-metallographic phases were studied, using scanning electron microscopy and X-ray diffraction. The results show that friction coefficient of frictional pair declines with increasing load and speed. Wear rate drops after attaining a maximum. There appear phase transformations, plastic deformation and ductile fracture of the HSS when temperature reaches a certain degree. |
| Key words: M2 steel high speed dry sliding friction and wear characteristics friction heat |
