Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (1): 101-104.DOI: 10.12068/j.issn.1005-3026.2017.01.021

• Mechanical Engineering • Previous Articles     Next Articles

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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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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