Guangdong stainless steel castingsIt is a low-cutting or non-cutting casting process. It is an excellent casting process and has a wide range of applications. Which blowholes should be avoided in Guangdong stainless steel castings?

The following isGuangdong stainless steel castingsSpecific measures to avoid bubbles:

1. Poor air permeability of the coating, perhaps due to insufficient negative pressure, poor air permeability of the filling sand, and unable to discharge the air and residue in the cavity in time.

2. The pouring speed is too slow, the sprue cup is not filled, the sprue is exposed, and the sprue is rolled into the air, sucking in the slag, forming the slag removal hole and the slag discharge hole.

3. The gasification and differentiation of the foam plastic model produces a large amount of gas and residue that cannot be discharged from the mold in time, and the foam layer is coated with dry sand and the quality is boring and poor.

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

5. The sealing performance of the joint between the sprue cup and the sprue and the pouring system is very poor, especially the connection between the sprue and the sprue cup is poor.

6. The molding sand has too fine particle size, large dust content, poor air permeability, and blockage in the negative pressure pipeline, which constitutes the distortion of the negative pressure.

7. Low deoxidation rate of molten steel. The furnace base, the furnace, and the inner lining are not clean, the slagging time is short, the slag blocking effect is poor during pouring, and the slag hole is formed by unreasonable pouring technology.

8. The pouring temperature is low, because the molten metal cannot fully vaporize the foam before filling, and the remaining material does not float to the riser, forming pores in the casting.

There are some casting holes in Guangdong stainless steel castings. Friends who need Guangdong stainless steel castings can contact us.