Stress analysis and process parameters optimization of circular saw blade during quenching process

Aiming at the problem that the deformation of the φ600 mm circular saw blade is large after quenching and thus affecting the performance of saw blade, the distribution characteristics of the quenching residual stress are analyzed based on the numerical calculation method. The results show that the effective residual stress of the circular saw blade is tensile stress during the whole quenching process. After quenching, the stress near the center hole is the biggest, followed by that near the outer tooth, and the stress in the middle is the smallest.The austenite forming temperature and holding time are selected as the optimizing variables, and the quenching residual stress as the target function. The response surface optimization method is used to optimize the quenching parameters of the circular saw blade. The results show that the minimum residual stress is 199 MPa when the austenite formation temperature is 837℃ and the holding time is 5 min.