An Improved Surface Treatment Process of 304 Stainless Steel Based on Low-Temperature Chromizing and Ultrasonic Vibration Extrusion

The ultrasonic vibration extrusion process is a widely used surface treatment of stainless steel, e.g., 304 to improve the quality and increase hardness wear resistance. However, for high-hardness traditional process, i.e., single does not fulfil its application requirements. To cope with this problem, paper proposes an improved method based on low-temperature chromizing obtain expected steel. Using orthogonal design multivariate regression, influence impact parameters integrity steel was studied in work. Finally, experimental results show that processed by proposed increased about 2.55 times compared roughness composite reduced average 60.8% unfinished surface. In addition, optimal combination obtained: spindle speed 240 rpm, feed 0.1 mm/r, static 40 μm, which can provide parameter support