Steel materials for stamping molds

Stamping is to press a thin metal plate into a workpiece with a contour similar to the mold through bending or a small amount of extension. The selection of stamping die steel should be determined according to the production batch of the formed workpiece, the material and thickness of the workpiece, the shape, the size, and the required accuracy. The normal failure of stamping dies is mainly due to wear. Soft, thin and low-strength workpieces have low forming pressure and less wear. Conversely, mold wear will accelerate.

For small stamping molds, generally high-alloy mold steel Cr12MoV or Cr12Mo1V1 steel (hardness HRC58~62) is used. Nitriding treatment can be carried out for molds that are prone to surface scratches.

For large dies used for stamping large workpieces, the punches are often made of Cr12MoV or Cr12Mo1V1 steel (hardness HRC58~62), and the die body is made of cast iron. Only hardened Cr5Mo1V, Cr12MoV, Cr12Mo1V1 are used at the places that are easy to wear. Steel inserts. In order to simplify the process, a locally hardened 7CrSiMnMoV steel insert can also be used.

The mold for producing complex shapes and thicker workpieces can be made of higher mold steel; and for the forming molds of simple and thinner workpieces, the lower mold material can be selected.

Cemented carbide has high wear resistance and scratch resistance, but it is costly, brittle, and difficult to process. It is generally only used to manufacture important mold inserts.

The steel-bonded cemented carbide and powder high-alloy wear-resistant steel developed in recent years, such as air-cooled high wear-resistant powder mold steel CPM10V (2.45%C, 5.0%Cr, 9.75%V, 1.25%Mo) has high resistance Abrasive and high toughness, it is a promising cold work mold material for manufacturing mold inserts.