Influence Factors on Surface Roughness of C19400 Alloy after Semi-Etching

The surface roughness of C19400 alloy after semi-etching seriously affects the yield and subsequent use of related products. The semi-etching experiments of four kinds of C19400 alloys were carried out under factory conditions. The effects of the size and quantity of the second phase and the kernel average misorientation (KAM) of the material on the surface roughness of the material after semi-etching were analyzed. The results show that when the size of the second phase particles was greater than 1 μm, it significantly affected the surface roughness of the material after semi-etching. The number density of large-sized second phase particles in C19400 alloy was controlled within a certain range to ensure that the KAM value of C19400 alloy material was greater than 2, which was more conducive to obtaining a relatively smooth material surface after semi-etching.