Common Problems And Solutions During The Cold Working And Forming Process of Stainless Steel

(1) Because there are defects such as dirt, scratches, pits, pits or heavy skin on the surface of the blank to be processed, these defects are amplified along with the processing deformation of the blank during the cold forming process, which directly leads to dirt and corrosion of the product. , mold scratches, partial cracking of the product, etc., which greatly reduces the yield rate. Therefore, before forming and processing, the surface condition of the blank must first be carefully checked to ensure that it is clean and free of surface defects before processing.
(2) Due to the dirty forming mold and working platform, the metal debris adhered to the surface cannot be removed in time, resulting in dirt, rust, and pits and scratches on the surface of the processed workpiece. In order to avoid this phenomenon, the processing mold must be regularly repaired and ground to ensure that its working surface is smooth and clean. At the same time, the processing equipment and processing workshop must be kept clean.
(3) Some molding processes cause sliding contact between metals. The local high pressure during the molding process will destroy the passivation film protecting the stainless steel, and there may be a risk of cold welding the unprotected stainless steel surface to the tool surface. When the solder joint breaks in the next sliding step, the surfaces of tools and molds that have been contaminated with debris will cause serious scratches on the stainless steel surface. This requires ensuring that the molding equipment is in good condition, and at the same time requiring operators to be proficient in the process and operate with caution to avoid material slippage.
(4) Stainless steel has high strength, and austenitic stainless steel also has obvious cold work hardening properties. If the deformation is too large during the cold forming process, it will cause the workpiece to break, and even damage the mold and machine equipment. . Therefore, during the production process, the hardness of the workpiece should be detected and a reasonable amount of deformation should be maintained to meet the needs of production efficiency while ensuring product quality.
(5) After cold processing of stainless steel workpieces, the surface passivation film will be damaged, and stamping oil, mold and other metal debris will also adhere to it, which can easily cause corrosion. In order to make the formed workpiece have good rustlessness and smoothness, it must be cleaned, degreased and passivated. If possible, a plastic film can be used to protect the surface of the workpiece.