Method for repairing stainless steel casting forging defects

Update:07 Apr 2020
Summary:

During the forging process of stainless steel (stainles […]

During the forging process of stainless steel (stainless acid-resistant steel) castings, due to many factors will cause some defects in stainless steel castings, and at this time, you must choose some repair precautions to restore it to normal use, then, stainless steel castings What are the precautions for repairing defects?

1. Repair method: stainless steel castings are repaired by electric welding. The key methods are manual arc welding, gas maintenance welding or gas shielded welding. Precision casting refers to the general term for the process of obtaining precision-sized castings. Compared with the traditional sand casting process, the casting size 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. Precision casting is also called lost wax casting. Its products are precise, complex, and close to the final shape of the part. It can be used directly without or with little processing. It is an advanced process with near net shape.

2. Removal method: internal defects, stainless steel castings are removed by using boring and milling machines. Precision casting is also called lost wax casting. Its products are precise, complex, and close to the final shape of the part. It can be used directly without or with little processing. It is an advanced process with near net shape. Surface defects, aiming at the defects of the dot-shaped scattered surface, choose a pistol drill or boring and milling machine to excavate the defects in production and processing; Polished to remove. For areas with polysilicon field effect transistors, use boring and milling machines to remove them. If the total area of ​​the defect is large, it can also be removed by carbon arc gouging.