The quality of stainless steel precision castings is closely related to the casting process. In order to better obtain standard cast steel castings, it is important to strictly follow the pouring operation procedures of castings and strictly follow the pouring standards and specifications of cast steel castings. When pouring stainless steel castings, it is necessary to strictly control the pouring temperature and pouring speed of the stainless steel castings.
1. Pouring temperature. Different pouring temperatures have a significant impact on the quality of stainless steel castings. Therefore, everyone needs to establish and determine the appropriate pouring temperature based on the alloy type, casting structure, and mold characteristics of the stainless steel castings we need to pour. Normally, the pouring temperature established by everyone when pouring stainless steel castings should be between 1540 and 1580 ℃;
2. Pouring speed. The pouring speed is related to the forming speed of stainless steel castings. Therefore, everyone should adopt different pouring speeds for stainless steel castings of different standards while ensuring that the gas in the mold cavity is discharged smoothly. In general, we should adopt a faster pouring speed for stainless steel castings that have standard simultaneous solidification, while for stainless steel castings that have achieved sequential solidification, everyone should adopt a slower pouring speed;
3. When pouring large and medium-sized stainless steel castings, everyone should pay attention that the molten steel needs to be left to stand for 2 minutes before pouring can begin;
4. After the successful pouring of stainless steel castings, it is necessary to immediately remove the pressure iron and box clamp after the castings have solidified, otherwise it will cause cracks to form in the stainless steel castings.
When pouring stainless steel castings, it is necessary to strictly follow the pouring standards and specifications to obtain qualified stainless steel castings.