Discussion on the Experience of Using Chromite sand to Solve the Surface Quality of Castings
A new type of chromite sand process is adopted, 40/70 mesh chromite sand is used as the surface sand, 30/50 mesh natural silica sand is used as the back sand, and ester hardening alkaline phenolic resin is used as the binder to carry out the traditional sand casting process. The transformation. The results show that the surface quality of the castings has achieved good results, and the mechanical sand and iron inclusions are completely avoided. The grade of steel castings has been increased from CT13-15 for clay sand casting to CT10-12, and the roughness has been improved from Ra100~400 to Ra25-100μm.
