Век трајања челичних куглица је генерално релативно дуг, али неки купци питају зашто челичне куглице купљене са других места имају пукотине и пукотине, што укључује кључну реч, унутрашњи напон.
Generally speaking, some materials such as stainless steel ball 3-head (304, 316) do not need heat treatment, such as bearing steel, stainless steel 440C, carbon steel, etc., all need heat treatment.
Heat treatment is a metal thermal processing process in which metal materials are heated, kept warm and cooled in a certain medium, and their properties are controlled by changing the metallographic structure on the surface or inside of the material. There is internal stress after heat treatment, and if the internal stress is too large, it will affect the internal structure of the steel ball, and it is easy to crack in the subsequent processing and use of the finished product. Therefore, we generally need to pass through strengthening after heat treatment. Strengthening means continuous consumption. Internal stress, optimize the internal structure of the steel ball, and do this step well, the above-mentioned steel ball cracking problem will not occur.
