Method of improving surface roughness of stainless steel castings

- Dec 22, 2017-

1, improve the smoothness of the stainless steel surface, affecting the roughness of the stainless steel surface is the metal liquid infiltration into the stainless steel surface of some voids, crystal diameter, surface pore average diameter sound, alloy liquid surface radius of curvature will affect the depth of metal liquid penetration is an important factor, Therefore, in order to obtain the smooth surface of the stainless steel castings need to reduce the crystal and filler particle diameter, reduce the surface pore diameter, or the use of additives can be enriched in the surface of the larger pores to fill in order to reduce the penetration depth of metal liquid.

2. The relationship between the temperature of stainless steel and the casting temperature of molten metal and the surface roughness of castings. With the increase of temperature and molten metal pouring temperature, the metal liquid filling property improved, the depth of infiltration into the surface pores increased, and the surface roughness of the stainless steel castings increases.

3, to deal with the deterioration of the alloy, and the use of better thermal conductivity of zircon and other fillers to improve the cooling speed of stainless steel castings, so that the casting surface layer of small grains, to reduce the surface roughness of castings.