东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (1): 101-104.DOI: 10.12068/j.issn.1005-3026.2017.01.021

• 机械工程 • 上一篇    下一篇

预应力加载条件下零件干磨削表面强化层特征

王任胜1,2， 董乐1， 马良1,3， 修世超1   

  1. (1. 东北大学 机械工程与自动化学院， 辽宁 沈阳110819； 2.辽宁科技学院 机械工程学院， 辽宁 本溪 117004；3. 新疆工程学院 机械工程系， 新疆 乌鲁木齐830091)
  • 收稿日期:2015-08-07 修回日期:2015-08-07 出版日期:2017-01-15 发布日期:2017-01-13
  • 通讯作者: 王任胜
  • 作者简介:王任胜(1979-)，男，辽宁抚顺人，东北大学博士研究生； 修世超(1958-)，男，辽宁凌源人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51375083)； 辽宁省教育厅科学研究一般项目(L2015274).

Characteristics of Dry Grinding Surface Hardening Layer Under Pre-stressed Loading Conditions

WANG Ren-sheng1,2， DONG Le1， MA Liang1,3， XIU Shi-chao1   

  1. 1. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China;2. School of Mechanical Engineering， Liaoning Institute of Science and Technology， Benxi 117004， China; 3. Department of Mechanical Engineering， Xinjiang Institute of Engineering， Urumqi 830091， China.
  • Received:2015-08-07 Revised:2015-08-07 Online:2017-01-15 Published:2017-01-13
  • Contact: XIU Shi-chao
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摘要： 采用预应力复合干磨削加工技术，对未调质45#钢试件在不同预应力加载条件下实施表面磨削淬硬，观测不同磨削深度和进给速度条件下的试件表层金相组织，测量并分析试件在不同预应力条件下磨削淬硬层厚度、金相组织的变化状况，并通过试件截面不同位置硬度测定显示淬硬层厚度及金相成分的变化，得到试件施加预应力对淬硬强化层厚度的影响规律.研究表明，预应力淬硬磨削能使工件表面产生强化层，且大的磨削深度和小的进给速度有利于试件表面发生相变强化以及表层塑性变形的增大.

关键词: 预应力淬硬磨削, 位错, 针状马氏体, 加工硬化, 磨削深度, 进给速度

Abstract: The surface grinding hardening of non-quenched and tempered 45# steel specimens under different pre-stressed loading conditions was carried out by using the pre-stressed hardening grinding process (PSHG). The metallographic structures of the specimens surface under different grinding depths and feed rates were observed， and the thickness of the hardening layer of the specimens and the change of its metallographic structure were measured and analyzed under different pre-stressed conditions. The influence of pre-stress on the thickness of the hardening layer was obtained by measuring the hardness of the specimens section. It was shown that the pre-stressed hardening grinding can make the workpiece surface become a hardening layer， and the larger grinding depth and the lower feed rate will be beneficial to the phase transformation hardening and plastic deformation of the surface layer.

Key words: pre-stressed hardening grinding, dislocation, acicular martensite, work hardening, grinding depth, feed rate

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