Hot working die steel refers to alloy tool steel suitable for making dies for hot deformation of metal, such as hot forging dies, hot extrusion dies, die casting dies, hot upsetting dies, etc. Because the hot working die works under high temperature and high pressure for a long time, the die material is required to have high strength, hardness and thermal stability, especially high thermal strength, thermal fatigue, toughness and wear resistance.

含碳量

Carbon content

一般为中碳，碳的质量分数为0.3%～0.6%。保证材料具有较高的强度和硬度，较高的淬透性以及较好的望性、韧性。

It is generally medium carbon, and the mass fraction of carbon is 0.3% ~ 0.6%. Ensure that the material has high strength and hardness, high hardenability, and good ductility.

合金元素

alloying element

加入的合金元素有Cr、Mn、Si、Ni、W、Mo、V等合金元素。其中Cr、Mn、Si、Ni合金元素的作用是强化铁素体和提高淬透性。W、Mo合金元素是为了防止回火脆性，Cr、W、Si合金元素能提高相变温度，使模具在交替受热与冷却过程中不致发生相变而发生较大的容积变化，从而提高其抗热疲劳的能力。

The added alloy elements include Cr, Mn, Si, Ni, W, Mo, V and other alloy elements. The role of Cr, Mn, Si and Ni alloy elements is to strengthen ferrite and improve hardenability. W. Mo alloy elements are used to prevent tempering brittleness. Cr, W and Si alloy elements can increase the phase transformation temperature, so that the mold will not undergo phase transformation and large volume change during alternate heating and cooling, so as to improve its thermal fatigue resistance.

分类

classification

热作模具钢的分类方法很多，可以根据合金元素含量及热处理后的性能分类，可以按用途分，也可以按合金元素分类。

There are many classification methods for hot work die steels, which can be classified according to the content of alloy elements and the properties after heat treatment, and can be classified according to the use or alloy elements.

按用途可分为热锻模用钢、热挤压模用钢、压铸模用钢，热冲裁模用钢。

It can be divided into steel for hot forging die, steel for hot extrusion die, steel for die casting die and steel for hot blanking die.

按耐热性可分为低耐热钢（350～370℃）、中耐热钢（550～600℃）、高耐热钢。

According to heat resistance, it can be divided into low heat-resistant steel (350 ~ 370 ℃), medium heat-resistant steel (550 ~ 600 ℃) and high heat-resistant steel.

按性能分为高韧性热作模具钢、高热强热作模具钢、高耐磨热作模具钢。

According to the properties, it can be divided into high toughness hot work die steel, high heat strength hot work die steel and high wear-resistant hot work die steel.

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The above is Shandong hot work die steel https://www.jnqhmj.com Thank you for checking the information of our company in your busy schedule. If you want to know more, you are welcome to call us for consultation!