Experiment study on the 20CrMnTi ground surface performances

To explore the grinding parameters′ effect on 20CrMnTi ground surface quality, the grinding experiments by using CBN wheel were conducted. The characteristic of ground surface Rockwell hardness H, surface residential stress σ_s, and subsurface residential stress σ_ss were discussed to reveal the grinding ability of 20 CrMnTi by using the single factor experiment. The results indicate that under the same condition, the H decrease with the increase of wheel speed v_s and grinding depth a_p, and increase with the increase of wheel feed rate v_w. The a_p has the greatest influence, followed by the v_w and v_s. The ground surface is equipped with the compressive residential stress. The compressive stress (absolute value) shows the increase with the increase of v_w and decrease of a_p. As the v_s increase, the σ_s fluctuated. With the increase of subsurface depth, the σ_ss changes from compressive stress to tensile stress and finally becomes close to 0. The σ_ss distribution looks better in lower v_s and shallower a_p. By using v_s=60 m/s, v_w=1.045 m/s, a_p=3 μm, the higher H and surface residential compressive stress, and better σ_ss distribution can be obtained, which shows better ground surface quality.