What materials are commonly used to make stamping moulds?
source：未知 Writer： hmdmould Time：2021-05-22 10:55 Browse：
The materials used to manufacture stamping moulds include steel, cemented carbide, steel-bonded cemented carbide, zinc-based alloy, low melting point alloy, aluminum bronze, polymer materials and so on.
At present, the main material for manufacturing stamping moulds is steel. The common types of workpieces are: carbon tool steel, low alloy tool steel, high carbon and high chromium or medium chromium tool steel, medium carbon alloy steel, high speed steel, base steel and hard alloy, steel bonded hard alloy, etc.
Carbon tool steels are mainly used for T8A, T10A and other mould carbon tool steels. It has the advantages of good processing performance and low price. However, the hardenability is different from the red hardness, and the heat treatment deformation is large and the bearing capacity is low.
Low alloy tool steels are made from carbon tool steels by adding appropriate alloying elements. Compared with carbon tool steels, it reduces the tendency of quenching deformation and cracking, improves the hardenability and abrasion resistance of the steels.
Low alloy steels used in mould making include CrWMn, 9Mn2V, 7CrSiMnMoV (code CH-1), 6CrNiSiMnMoV (code GD), etc.
3. High carbon and high chromium tool steels are commonly used in high carbon and high chromium tool steels Cr12Cr12MoV and Cr12Mo1V1 (code D2). They have good hardenability, hardenability and wear resistance, small heat treatment deformation, high wear resistance, and are the bearing capacity of deformed mould steels and high speed steels.
However, in order to reduce the inhomogeneity of carbide and improve its performance, it is necessary to carry out multiple upsetting (axial upsetting and radial upsetting) because of the serious segregation of carbide.
High carbon chromium tool steels used for mould include Cr4W2MoV, Cr6WV, Cr5MoV, etc. They have low chromium content, less eutectic carbide, uniform carbide distribution, small heat treatment deformation, good hardenability and dimensional stability. Compared with high carbon steels and high chromium steels with serious segregation of carbides, their properties are improved.
High speed steel is the mould steel with the highest hardness, wear resistance and compressive strength, and its carrying capacity is extremely high.
Commonly used molds are W18Cr4V (code 8-4-1) and W6Mo5Cr4V2 (code 6-5-4-2, the U.S. brand M2) with low tungsten content, and carbon-vanadium high speed steel 6W6Mo5Cr4V (code 6W6 or low carbon M2). Forging is also needed to improve the carbide distribution of high speed steels.
Add a small amount of other elements into the basic compos
ition of high speed steel, and appropriately increase or decrease the carbon content to improve the performance of steel. These steels are collectively called base metals.
They not only have the characteristics of high speed steel, but also have a certain wear resistance and hardness, fatigue strength and toughness are better than high speed steel. For high strength, high toughness cold mould steel, the material cost is lower than high speed steel.