Defect repair methods for stainless steel precision castings

1. Casting adhesive:

It is an instinctive choice for enterprises to repair castings, with the main characteristics of simplicity, convenience, low price, and low requirements for employees. However, this method is only suitable for rough castings, and generally repair areas cannot be further processed, and the combined strength and hardness are very low. This process is only suitable for simple and rough castings, or castings with low added value. With the development of the foundry industry, foundry adhesive is becoming increasingly unsuitable for customer requirements,

2. Welding repair:

Almost all casting manufacturers choose welding repair to solve casting defects encountered in production. Welding repair of castings refers to the use of welding materials that generally match the metal filler material of the casting, in order to achieve the basic mechanical performance standards required by the parent material. This requires a variety of welding repair methods; The welding repair method is simple; Welding repair has high efficiency, low cost, low environmental pollution, and simple subsequent treatment. Only in this way can it be accepted, recognized, and trusted by casting manufacturers. At present, there are many types of welding machines for casting welding repair in the market, mainly including the following:

3. Argon arc welding:

Argon arc welding, also known as argon gas shielded welding. It is to apply argon arc protective gas around the arc welding area to isolate the air outside the welding area and prevent oxidation of the welding area.

Precision castings (alloy steel, stainless steel precision castings) and aluminum alloy die castings are often repaired by argon arc welding machines. Some mold manufacturing and repair manufacturers also use this welding machine to repair mold defects

4. Cold welding repair

Cold welding machine: capable of releasing welding energy to a very small range (<1 square millimeter) in an instant (ms level), allowing the filler material to completely melt onto the workpiece. During the welding repair process, the heat generated by the workpiece is extremely small, and the workpiece is generally in a normal temperature state, which can avoid the drawbacks of traditional welding such as deformation, cracks, and discoloration. After several years of development, the application direction and technology of welding machines have made great progress, and they have already occupied a large share in the repair market.