At present, the popular cold work die steel is widely used in many industries. It can be widely used in blanking, deep drawing, cold heading, wire rolling and other processes. Under the action of various processes, the highly praised cold work die steel has high hardness, strength and wear resistance. So what are the classifications of cold working die steel?

1、低合金类

1. Low alloy

为了能够满足模具的性能，高碳低合金类模具灯是在碳素工具钢的基础上加入了适量的合金元素，比如铬、镍、锰、钼、钛、钨、钒、硅等元素冶炼而成的，合金元素的加入提高了冷作模具钢的塑造性合金元素的加入提高了冷作模具钢的淬透性，降低了模具易变形和开裂的倾向。因此这种受欢迎的冷作模具钢主要特点是触火温度低，功率性好，热，处理变形小，并且具有很强的韧性。

In order to meet the performance of the die, the high-carbon and low-alloy die lamp is smelted by adding an appropriate amount of alloy elements such as chromium, nickel, manganese, molybdenum, titanium, tungsten, vanadium and silicon on the basis of carbon tool steel. The addition of alloy elements improves the moldability of cold working die steel, and the addition of alloy elements improves the hardenability of cold working die steel, The tendency of easy deformation and cracking of the die is reduced. Therefore, this popular cold work die steel is mainly characterized by low fire contact temperature, good power, small heat treatment deformation and strong toughness.

2、中合金类

2. Medium alloy

由于碳含量相对低、铬含量低，属于过共析钢。其组织中有大量共晶碳化物，淬火有大量残留奥氏体，热处理后变形小、耐磨性高、承载力大。这类冷作模具钢中的碳化物以Cr7C3型为主，并有少量M6C和MC型，具有耐磨性好和热处理变形小的特点。

Due to the relatively low carbon content and low chromium content, it belongs to hypereutectoid steel. There are a lot of eutectic carbides in the structure, a lot of residual austenite after quenching, small deformation, high wear resistance and large bearing capacity after heat treatment. The carbides in this kind of cold working die steel are mainly Cr7C3 type and a small amount of M6C and MC type. It has the characteristics of good wear resistance and small heat treatment deformation.

3、高合金类

3. High alloy

高合金类冷作模具钢具有更高的硬度，抗压度和耐磨性，能够满足多方面的使用需求，而且寿命更长。这种类型的冷作模具钢是比较常用的一种类型，经过热处理之后变形较小，并且耐磨性高，承载力大，因此能够在大中型的冷作模具当中得到广泛应用。

High alloy cold working die steel has higher hardness, compression resistance and wear resistance, can meet various service needs, and has a longer service life. This type of cold working die steel is a commonly used type. After heat treatment, it has small deformation, high wear resistance and large bearing capacity. Therefore, it can be widely used in large and medium-sized cold working dies.

综上所述，冷作模具钢的分类主要包括低合金类、中合金类与高合金类。由于这三种不同的冷作模具钢所含有的成分不同，因此其表现出来的性能也存在一定的差别，用户想要从中做出合理选择，则需要事先了解其差别还能做出更明智的选择。

To sum up, the classification of cold working die steel mainly includes low alloy, medium alloy and high alloy. Because these three different cold working die steels contain different components, their performance also has certain differences. If users want to make a reasonable choice, they need to understand their differences in advance and make a more wise choice.