重载接触试验与机理分析

发布时间：2018-01-25 15:58

本文关键词： 重载接触托辊系统磨损机理表面形貌　出处：《同济大学学报(自然科学版)》2017年07期 　论文类型：期刊论文

【摘要】：为研究重载接触工作状况下机械零部件的耐磨性,提高零部件的使用寿命,以某重载装备伸缩臂的托辊系统为研究对象,进行托辊系统与支撑板重载接触试验,研究摩擦试件的磨损机理.使用光学显微镜、扫描电子显微镜和能谱分析仪对试件磨损后的表面宏/微观形貌、化学成分和塑性变形情况进行分析.结果表明,在重载工作状况下,随着磨损次数的增加,支撑板的磨损机理呈现为综合的磨粒磨损和黏着磨损;而由于托辊的硬度比支撑板硬度高,所以托辊的磨损机理主要是磨粒磨损,伴随着轻微的黏着磨损.通过对磨损后托辊截断面的显微组织观察,发现表层片状珠光体局部区域有位错、组织破坏等现象,这表明重载接触下托辊已经发生塑性变形.
[Abstract]:In order to study the wear resistance of mechanical parts under heavy load contact working condition and improve the service life of the parts, the heavy load contact test between the roller system and the supporting plate was carried out by taking the roller system of a certain heavy duty equipment telescopic arm as the research object. The wear mechanism of friction specimens was studied. The macro / micro morphology, chemical composition and plastic deformation of the worn specimens were analyzed by optical microscope, scanning electron microscope and energy spectrum analyzer. With the increase of wear times, the wear mechanism of the supporting plate is integrated abrasive wear and adhesive wear. Because the hardness of the roller is higher than that of the supporting plate, the wear mechanism of the roller is mainly abrasive wear, accompanied by slight adhesion wear. It is found that there are dislocations and microstructures in the local area of the surface lamellar pearlite, which indicates that the rollers have plastic deformation under heavy load contact.
【作者单位】：同济大学机械与能源工程学院;
【基金】：国家自然科学基金(51575398) 上海市自然科学基金(15ZR1442400) 中央高校基本科研业务费专项资金
【分类号】：TH117.1
【正文快照】： 低速重载接触运动作为一种特殊工作状况广泛存在于实际工程应用中.与普通摩擦副运动相比,其运行条件恶劣,更易出现磨损等失效现象,进而导致机械系统零部件工作效率低、工作不稳定,甚至丧失工作能力[1-2].因此,研究重载接触摩擦副的磨损机理和规律,寻求防止和减少磨损的措施,对

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