Die steel can be roughly divided into three categories, namely: cold work die steel, hot work die steel and plastic die steel. Commonly used mold steel materials are mainly these three types of mold steel.
A, cold work die steel
Cold work die steel is mainly used to manufacture molds that press and form workpieces in a cold state. Such as: cold blanking dies, cold stamping dies, cold drawing dies, embossing dies, cold extrusion dies, thread pressing dies and powder pressing dies, etc. The range of cold work die steel is very wide, from various carbon tool steel, alloy tool steel, high speed tool steel to powder high speed tool steel and powder high alloy tool steel. Cold work die steel is vacuum degassed and refined steel, with pure inner quality, good machinability, significantly improved cutting, good hardenability, air-cooled hardening is not easy to cause quenching cracks, excellent wear resistance, good toughness, usable For stainless steel and high hardness material blanking die.
1. Anti-wear cold work die steel
6Cr4W3MoVNb, 6W6Mo5Cr4V, 7Cr7Mo3V2Si, Cr4W2MoV, Cr5Mo1V, Cr6WV, Cr12, Cr12MoV, Cr12W, Cr12Mo1V1.
2. Shock-resistant cold work die steel
4CrW2Si, 5CrW2Si, 6CrW2Si.
3. High carbon low alloy cold work die steel
9SiCr, 9CrWMn, CrWMn, Cr2, 9Cr2Mo, 7CrSiMnMoV, 8Cr2MnWMoVS, Cr2Mn2SiWMoV.
4. Non-magnetic mold steel
7Mn15Cr2Ae3V2WMo, 1Cr18Ni9Ti.
5. High speed steel for cold work die
W6Mo5Cr4V2, W12Mo3Cr4V3N, W18Cr4V, W9Mo3Cr4V.
6. Cold work die carbon tool steel
T7, T8, T9, T10, T11, T12.
B, hot work die steel
Hot work die steel is mainly used to manufacture dies that press-work workpieces at high temperature. Such as: hot forging dies, hot extrusion dies, die casting dies, hot upsetting dies, etc. Commonly used hot work die steels are: alloy die steels with medium and high carbon content added with alloying elements such as Cr, W, Mo, V; for hot work die steels with special requirements, high-alloy austenitic heat-resistant die steels are sometimes used. .
1. Low heat resistance hot work die steel
5CrMnMo, 5CrNiMoVSi, 4CrMnSiMoV, 5Cr2NiMoVSi.
2. Medium heat resistance hot work die steel
4Cr5MoSiV, 4Cr5MoSiV1, 4Cr5W2VSi, 8Cr3.
3. High heat resistance hot work die steel
3Cr2W8V, 3Cr3Mo3W2V, 5Cr4Mo4W2VSi, 5Cr4Mo3SiMnVAe, 5Cr4W5Mo2V, 6Cr4Mo3Ni2W.
C, plastic mold steel
Due to the variety of plastics, the requirements for plastic products are also very different, and various performance requirements are also put forward for the materials used to make plastic molds. Therefore, many industrially developed countries have formed a wide range of steel series for plastic molds. Including carbon structural steel, carburized plastic mold steel, pre-hardened plastic mold steel, age-hardening plastic mold steel, corrosion-resistant plastic mold steel, free-cutting plastic mold steel, overall hardened plastic mold steel, martensite Aging steel and plastic mold steel for mirror polishing, etc.
1. Carburized plastic mold steel
20Cr, 12CrNi3A.
2. Age-hardening plastic mold steel
3Cr2Mo, 3Cr2NiMnMo, 5CrNiMnMoVSCa, 40Cr, 42CrMo, 30CrMnSiNi2A.
3. Carbon plastic mold steel
SM45, SM50, SM55.
4. Corrosion-resistant plastic mold steel
2Cr13, 4Cr13, 9Cr18, 9Cr18Mo, Cr14Mo4V, 1Cr17Ni2.