How to reasonably choose the material of cold deformation mould and proper heat treatment to improve the service life of the mould is a very important issue in production. The normal failure of cold deformation mould should be wear, slight plastic deformation and fatigue failure. However, in actual production, in addition to wear and failure, it is not uncommon to fail in advance, such as collapse, toughness, cracking, etc. As we all know, the service life of cold-deformed moulds is a comprehensive factor; the rationality of raw material selection, the metallurgical quality of raw materials, the rationality of design and manufacturing processes, the conditions of use and the technical level of operators.
Selection of cold deformed die steel
1. Working conditions of the mould, including equipment type, processing frequency, material to be processed, lubrication and environment;
2. The complexity of the mould form and the processing procedure;
3. Production batch and technical requirements of the product;
4. The difficulty of the source of mould materials and processing conditions, the material cost of large moulds often account for more than 50% of the cost of the mould, for moulds with complex shapes and high precision requirements, mould steel with small quenching deformation should be used.
According to the actual use, the commonly used cold-deformed die steels are low-hardenability steel, low-deformation steel, micro-deformed steel, high-strength steel, high-toughness steel, and impact-resistant cold-deformed die steel.