Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (3): 395-399.DOI: 10.12068/j.issn.1005-3026.2017.03.019

• Mechanical Engineering • Previous Articles     Next Articles

Surface Grinding Hardness Layer Thickness Prediction Under Pre-stress Loading Condition

MA Liang1,2, DONG Le3, ZHANG Xiu-ming1, XIU Shi-chao1   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. Department of Mechanical Engineering, Xinjiang Institute of Engineering, Urumqi 830091,China; 3. China FAW Corporation R&D Center,Changchun 130011,China.
  • Received:2015-10-29 Revised:2015-10-29 Online:2017-03-15 Published:2017-03-24
  • Contact: XIU Shi-chao
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Abstract: To evaluate the effect of pre-stress parameter on hardening-layer thickness during grinding process, surface grinding hardening process was applied to unquenched 45# steel workpiece at different pre-stress (0~100MPa) conditions. In a sequence of “thermal-force” loading order, grinding hardening process was simulated using the ANSYS software. Furthermore, how thermal transformation and work hardening influence layer thickness and thickness distribution at different location from grinding wheel’s entry point were discussed. Thickness simulation data shows that the calculation error is less than 6%, indicating that the results are in good agreement with the experimental data. Meanwhile, the pre-stress loading leads to the slight reduction of thickness (<10%) on the surface grinding hardening-layer, which proves that loading pre-stress provokes re-distribution of microstructure, suppresses diffusion of quenched carbide, but probably is not a beneficial factor to increase hardening layer thickness.

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

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