Effect of Ultrasonic Rolling Process Parameters on Surface Integrity and Impact Performance of 45 Steel
Ultrasonic rolling orthogonal tests were designed with static pressure(400,800,1 200 N),amplitude(3,5,7 μm),rolling pass(1,2,3)as variables,surface roughness,residual stress,microhardness and impact absorption work as response.The effect of ultrasonic rolling parameters on the surface integrity and impact properties of 45 steel was studied.The results show that with the increase of static pressure and amplitude,the surface roughness of the sample increased,and the effect of rolling pass was small.With the increase of static pressure,amplitude and rolling pass,the surface residual compressive stress of the sample increased slightly.The depth of hardened layer increased with the increase of static pressure and amplitude,and first decreased and then increased with the increase of rolling pass.The impact absorption work first decreased and then increased with the increase of static pressure and amplitude,and increased with the increase of rolling pass.The most influential factors of surface roughness,surface residual stress,hardened layer depth and impact absorption work were amplitude,static pressure,static pressure and rolling pass,respectively.The optimum ultrasonic rolling parameters were as follows:static pressure of 400 N,amplitude of 7 μm,rolling pass of 3.Under the eptimal parameters,the gray correlation degree of the sample was the largest,and the surface integrity and impact performance were good.
ultrasonic surface rolling processsurface integrityimpact fractureresidual stress
万方数据
维普
