Analysis of grinding temperature and performance of high strength steel 20Cr2Ni4A

Abstract

In order to enhance the grinding performance of high-strength steel 20Cr2Ni4A, a grinding temperature model was constructed, taking into account the contact deformation of the grinding wheel and workpiece. The accuracy of model was validated. The results of the simulation and experimental studies indicate that the grinding temperature increases from 299 to 617 °C as the grinding depth increases from 10 to 110 μm, the grinding temperature increases from 321 to 463 °C as the grinding speed increases from 5 to 30 m/s. In comparison to the effects of grinding depth and grinding speed, the influence of feed speed on grinding temperature is relatively insignificant, and the grinding temperature fluctuates in the range of 600–700 ℃. The prediction accuracy of the temperature model can reach 88.9%. The experimental results of the grinding performance demonstrate that when the grinding depth is 10 μm, the surface roughness is approximately 0.392 μm, the maximum grinding temperature is approximately 300 °C, the maximum residual compressive stress can reach 607 MPa, and there is no obvious white layer on the subsurface. When the grinding depth is 110 μm, the surface roughness is approximately 1.116 μm, and the maximum grinding temperature is approximately 600 °C. The thickness of the white layer is approximately 4.03 μm. The research results provide a reference for the grinding process design of high strength-strength steel 20Cr2Ni4A.