Effective Measures for Stretch-proof Cracking of Stainless Steel

The use of suitable lubricants has a significant effect on the deep drawing of stainless steel. Lubricants can form a layer of film with a certain degree of toughness and elongation between the male and female molds, which is conducive to the deep drawing of the 301 stainless steel strip.
For deep-drawing stainless steel deep drawing and difficult forming, in the actual production can use polyvinyl fluoride film to act as a lubricant. Polyvinyl fluoride film has excellent tear strength, a certain degree of toughness and elongation, and is easy to clean. After coating the dry film, the dry film can be deformed along with the blank during the drawing process, and the blank can be separated from the mold at all times. In addition, the film itself has a certain porosity and a large number of fiber cracks, so it is also possible to store a certain amount of lubricating oil, so the film The equivalent of a dry film lubricant. This lubrication method can effectively separate the deformed stainless steel plate from the surface of the mold, which has a good lubrication effect and is conducive to improving the service life of the mold and the qualification rate of the product.
There are also some other simple preventive measures such as the use of white cast iron as a blank holder, because the white cast iron oil storage performance is good, easy to form a lubricant film; for example, the use of tapered blank holder ring; In addition, the workpiece edge processing smooth The removal of micro-cracking gaps can also effectively prevent cracking. (This article consists of: 301 stainless steel belt)

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