Method For Removing Air Holes From Steel Castings

First, change the gate structure
The shape of steel casting has an important influence on the control of casting temperature and the adjustment of pouring direction. Reasonable gate design can avoid stress concentration and flow field disturbance, and reduce the possibility of gas residue in steel castings. Therefore, reasonable gate design is one of the effective ways to reduce the porosity in the process of steel casting.

Second, increase the casting temperature
Casting temperature is one of the important factors affecting the quality of steel castings. When the casting temperature is too low, it will make the fluidity insufficient, resulting in the gas is difficult to completely discharge, resulting in the appearance of pores in the cast steel. Therefore, during the casting process, an appropriate increase in temperature can help eliminate the pores inside the cast steel.

Third, increase carbon enhancer
In the process of steel casting, adding a certain amount of carbon enhancer can effectively inhibit the formation of pores. The addition of carbon enhancer can promote the precipitation of gas, and reduce the possibility of bubble formation and accumulation during the casting process, so as to effectively improve the porosity problem in the cast steel.

Fourth, vacuum casting
Vacuum casting is an effective method to reduce the porosity problem in steel casting. The method adopts vacuum casting, which can effectively control the residual gas in the casting process, so as to avoid the formation of pores in the cast steel.

The problem of porosity in steel casting is often faced in the casting process. In order to solve this problem, changing gate structure, increasing casting temperature, increasing carbon reinforcer and adopting vacuum casting can effectively reduce the incidence of porosity in steel castings. In the casting process, the appropriate method should be selected according to the specific situation to reduce the occurrence of porosity, so as to ensure the quality and performance of the steel casting.