国产精品99精品无码视亚,免费国产黄网站在线观看可以下载,99热在线观看,天堂8中文在线最新版在线

Metal stamping die, the use of a variety of metal materials, mainly carbon steel, alloy steel, cast iron, cast steel, cemented carbide, low melting point alloy, zinc-based alloy, aluminum bronze, synthetic resin, polyurethane rubber, Laminated birch board and so on.

Mold material, requiring high hardness, high strength, high wear resistance, appropriate toughness, high hardenability and heat treatment is not deformed and difficult to crack and other properties of quenching.

Reasonable selection of mold materials and the implementation of the correct heat treatment process is to ensure that the key to the life of the mold. Mold for different purposes, should be based on their working conditions, stress conditions and materials to be processed performance, production volume and productivity and other factors considered, and the performance of the above requirements have focused, and then made the steel and heat treatment The corresponding choice of technology.