Surface integrity of titanium part by ultrasonic magnetic abrasive finishing

摘要

The surface integrity of titanium part is poor after milling; it is unable to meet the accuracy requirements for use. To solve this problem, the ultrasonic vibration-assisted magnetic abrasive finishing was proposed to be used for the surface finishing treatment. The finishing experimental result shows that the efficiency of ultrasonic magnetic abrasive finishing is 40 % higher than magnetic abrasive finishing. The milling texture on part surface faded or disappeared after ultrasonic magnetic abrasive finishing. The surface original micro-cracks have been completely removed. The surface stress state changed from the residual tensile stress 280 MPa before finishing to residual compressive stress 20 MPa after finishing. It verified that the ultrasonic magnetic abrasive finishing can efficiently promote the surface integrity of titanium parts and ultimately gain the best surface quality and performance.