The blanking and forming of materials in cold condition is done in many different applications such as; shearing, punching, cold forging, drawing, cold extrusion, rolling and powder pressing.
All applications include high mechanical forces and sliding contact between the tool surface and the work material. There are high demands on tool hardness to give wear resistance and resistance to plastic deformation. In order to improve the wear resistance further some of the cold work steel grades are highly alloyed giving hard particles (carbides) in the matrix. The combination of high hardness and hard carbides is however also impairing the machinability.
Depending on the application, the work material and the production series, a cold work tool steel program and high speed steel program will contain grades with different combinations of:
Cold work steel is exposed to high stresses and requires great resistance against wear, impact and bending. The development of new steel grades is mainly guided by analyzing damage suffered by tools in various processes. In each area of use, properties are sought which will extend the working life of the tool. Different types of wear demand different types of steel. Product development is moving towards producing more robust steels with higher resistance to wear and greater durability.
|AISI - D2||1.2379||X155CrVMo12-1||SKD-11||Cr12MoV||-|
|AISI - S7||1.2355||50CrMoV13-15||-||-||-|