Guangdong stainless steel casting is a low-cut or no-cut casting process. It is an excellent process technology in the foundry industry and has a wide range of applications. What are the pores in stainless steel precision casting that need to be avoided?

The specific introduction of the avoidance of stainless steel precision casting pores is as follows:

1. Poor air permeability of the coating or insufficient negative pressure, poor air permeability of the filling sand, and inability to discharge the gas and residues in the cavity in time.

2. The pouring speed is too slow to fill the sprue cup, exposing the sprue, drawing in air, and sucking in the slag, forming a carrying hole and a slag hole.

3. The gasification and differentiation of the foam model generates a lot of gas and residues that can not be discharged from the mold in time, and the foam and coating layer are filled with dry sand and the dry sand is poor.

4. Due to the unreasonable planning of the pouring system, the filling speed of the molten metal is greater than the foam gasification concession and the gas discharge speed, forming the filling front, entrap the gasification residue in the metal liquid and vaporize again to form the smoke-black differentiation pores on the inner wall .

5. The connection between the sprue cup and the sprue and the pouring system is not well sealed, especially the connection between the sprue and the sprue cup is not well sealed.

6. The particle size of the molding sand is too fine, the dust content is high, the air permeability is poor, and the internal blockage of the negative pressure pipeline constitutes the distortion of the negative pressure.

7. Poor deoxidation of molten steel, dirty slag removal in the furnace, furnace, and ladle, too short a calming time, poor slag retention during the pouring process, and unreasonable pouring technology to form a slag hole.

8. The pouring temperature is low, and the molten metal at the front of the filling can not fully gasify the foam, and the remaining material can't float to the riser in time and condense to form pores in the casting.

Stainless steel precision casting pores need to be avoided in the above aspects. Friends who need stainless steel precision casting can contact us.