Steel is indispensable in the construction industry, and with the increase of the construction industry, the demand for steel is also increasing day by day. At the same time, the application of die steel is very wide. Today, we are going to talk about several common heat-resistant die steels. The performance characteristics of hot work die steel include low heat resistance and high toughness die steel, medium heat resistance and toughness steel, high heat resistance and hot work die steel, special steel Purpose: hot working die steel. Next, Jinan die steel will share with you our common hot working die steel.
 

一、低耐热高韧性模具钢：主要是用来加工承受大冲击载荷的热锻模，因为这类模具要求钢的冲击韧性好、淬透性高、导热性能好，并且有较高的热疲劳抗力，能够在400℃的高温工作环境下承受急冷急热的工作条件。

1、 Die steel with low heat resistance and high toughness: it is mainly used to process hot forging die bearing large impact load, because this kind of die requires steel with good impact toughness, high hardenability, good thermal conductivity, high thermal fatigue resistance, and can withstand the working conditions of quenching and heating at 400 ℃.

二、中耐热韧性钢：该类钢淬透性很好，100mm直径的工件空冷即能淬透，这类模具钢材综合性能好，在淬火、回火热处理工艺条件下，具有高硬度、高强度以及良好的韧性、塑性配合。中耐热韧性钢广泛应用于加工热变形用模具（如机锻模、高速锤锻模）和压铸模。

2、 Medium heat resistant toughness steel: the hardenability of this kind of steel is very good. The workpiece with a diameter of 100 mm can be hardened by air cooling. This kind of die steel has good comprehensive properties. Under the optimal quenching and tempering heat treatment conditions, it has high hardness, high strength and good toughness and plasticity. Medium heat resistant toughness steel is widely used in processing hot deformation dies (such as machine forging dies, high speed hammer forging dies) and die casting dies.

三、高耐热热作模具钢：这类钢是有较高耐热性，在高温下仍能保持一定的高温硬度和高温强度，同时具有较高的淬透性和耐磨性，可以在600—700℃的高温下工作，有强烈的二次硬化效果，回火抗力好，抗疲劳性和断裂韧度均较高。

3、 High heat resistant hot working die steel: this kind of steel has high heat resistance, can maintain certain high temperature hardness and high temperature strength at high temperature, and has high hardenability and wear resistance. It can work at high temperature of 600-700 ℃, has strong secondary hardening effect, good tempering resistance, high fatigue resistance and fracture toughness.

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