Abstract: In view of grinding surface microstructure damages under small depth cut， the connection between ground residual stress and microcrack was theoretically analyzed. Surface residual stress and its cloud distribution were simulated under different ground conditions for 45 steel workpieces using finite element analysis， and then effects of grinding depth and cooling conditions on the grinding surface residual stress were discussed. At last， grinding experiments were conducted for 45 steel workpieces under different conditions to verify the simulation results by measuring the specimen surface residual stress. At the same time， the grinding surface microstructures with different grinding parameters were studied using SEM. The test results show that adopting appropriate grinding parameters and conditions can effectively reduce and avoid the grinding surface microstructure damages.

Key words: surface grinding, surface microstructure damage, residual stress, microcracks, grinding burn