Effective Measures to Prevent Cracking of 304 Stainless Steel

The use of appropriate lubricants have a significant effect on the drawing of 304 stainless steel. The lubricant can form a layer of film with certain toughness and elongation between the convex and concave molds, which is beneficial to the drawing forming of the stainless steel.

For drawing a large degree of deformation, forming difficult stainless steel drawing parts, in the actual production of polyvinyl fluoride film can be used as a lubricant. Polyvinyl fluoride film has excellent hang tear strength, a certain degree of toughness and elongation and easy to clean. After coating with dry film, the dry film can be deformed along with the blank during drawing. The blank can always be separated from the mold. In addition, the film itself has a certain degree of porosity and a large number of fiber cracks, so a certain amount of lubricating oil can also be stored. Therefore, equivalent to a layer of dry film lubricant. This lubrication method can be effectively deformed stainless steel plate and die surface isolation, lubrication effect is good, help to improve mold life and product qualification rate.

In addition there are some other simple preventive measures, such as the use of white cast iron to do blanket ring abrasive, because the white cast iron storage performance, easy to form a lubricating film; Another example is the use of conical crimping ring. In addition the workpiece edge smoothing, to remove the micro-crack gap, but also can effectively prevent cracking.