东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (2): 211-215.DOI: 10.12068/j.issn.1005-3026.2018.02.013

• 机械工程 • 上一篇    下一篇

冲击功对8Mn-2Cr-Si钢磨粒磨损性能的影响

盛忠起1， 宋百隆1,2， 魏世丞2， 王玉江2   

  1. (1. 东北大学 机械工程与自动化学院， 辽宁 沈阳110819; 2. 陆军装甲兵学院 装备再制造技术国防科技重点实验室， 北京100072)
  • 收稿日期:2016-09-04 修回日期:2016-09-04 出版日期:2018-02-15 发布日期:2018-02-09
  • 通讯作者: 盛忠起
  • 作者简介:盛忠起(1972-)，男，山东宁津人，东北大学副教授，博士； 魏世丞(1974-)，男，辽宁沈阳人，陆军装甲兵学院教授.
  • 基金资助:
    国家自然科学基金优秀青年科学基金资助项目(51222510).

Influence of Impact Energy on 8Mn-2Cr-Si Steel Abrasive-Wear Properties

SHENG Zhong-qi1， SONG Bai-long1,2， WEI Shi-cheng2， WANG Yu-jiang2   

  1. 1. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China; 2. National Key Laboratory for Remanufacturing， Academy of Army Armored Force， Beijing 100072， China.
  • Received:2016-09-04 Revised:2016-09-04 Online:2018-02-15 Published:2018-02-09
  • Contact: WEI Shi-cheng
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摘要： 研究了不同冲击功对8Mn-2Cr-Si钢磨粒磨损性能的影响，利用X射线衍射仪分析了试样冲击表面的组织相变过程，并利用扫描电子显微镜对材料磨损表面及亚表层进行分析，探讨其磨损机制.结果表明:8Mn-2Cr-Si钢在冲击磨损过程中，冲击诱发马氏体相变，且冲击功越大，马氏体相变量越多，材料加工硬化效果越好；但随着冲击功的增大，材料磨损失重增多，主要是由于不同冲击功条件下磨损机制不同，并且材料塑性变形阶段使磨粒嵌入基体，成为应力集中源，在循环冲击过程中产生疲劳裂纹，逐渐扩展至材料表面，最终形成大块剥落使材料严重磨损失效.

关键词: 8Mn-2Cr-Si钢, 冲击功, 磨粒磨损, 磨损机制, 马氏体相变

Abstract: The abrasive-wear properties of 8Mn-2Cr-Si steel were tested under different impact energy conditions. XRD(X-ray diffractometer)was used to investigate the structural transformation of the impacted wear surface， and SEM(scanning electron microscope)was used to investigate the morphology of wear surface and subsurface in order to study wear mechanism. The results show that impact-induced martensite phase transformation occurs during the wear. With the impact energy growing， the amount of martensite transformation increases， the work hardening effect improves and the wear loss increases. The reason is the wear mechanisms are different under different impact energy conditions. Besides， the grains embedded in the substrate during the plastic deformation will become sources of stress concentration. Thus the fatigue cracks will grow and propagate to the wear surface gradually under the circulation impact， causing large impact-flaking， finally making the material failure.

Key words: 8Mn-2Cr-Si steel, impact energy, abrasive wear, wear mechanism, martensitic transformation

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