Stainless steel precision casting coating and dewaxing control tips

Update:20 Mar 2020
Summary:

(1) Strict coating quality control and management (guǎn […]

(1) Strict coating quality control and management (guǎn lǐ) The staff of the stainless steel (stainless acid-resistant steel) company should regularly monitor the gelation time of the binder extract in the coating slurry and resolutely discard the coating that has deteriorated , Especially surface coatings.

(2) Ensure that the shell has good thermal conductivity. Ensure that the wax mold surface layer melts before the wax mold is inflated. At the same time, ensure that the shell surface layer has good air permeability and minimize the overall wax mold thermal expansion. The resulting tension prevents the shell from cracking.

(3) Improve the drying speed of the shell. The higher the shell strength of the shell dryer, the stronger the ability of the wax mold to expand when dewaxing. Precision casting is also called lost wax casting. Its product is precise, complex, and close to the final shape of the part. It can be used directly without machining or with little processing. It is an advanced process with nearly net shape. Precision casting refers to the general term for the process of obtaining precision-sized castings. Compared with the traditional sand casting process, the size of the casting obtained by precision casting is more accurate and the surface finish is better. It includes: investment casting, ceramic casting, metal casting, pressure casting, and lost foam casting. Stainless steel (stainless acid-resistant steel) precision casting shell is not easy to crack.

(4) Energy spectrum analysis of burr defect position (position) At the same time, the appropriate shell drying speed also ensures that there is less moisture remaining in the shell, and it will not be exposed to the high temperature of steam when dewaxing, and abnormal boiling will occur (fèi téng ) To avoid local cracking and cracking of the shell. Precision casting refers to the general term for the process of obtaining precision-sized castings. Compared with the traditional sand casting process, the size of the casting obtained by precision casting is more accurate and the surface finish is better. It includes: investment casting, ceramic casting, metal casting, pressure casting, and lost foam casting.