The specific planning of some projects still needs to be determined according to the needs, for example, the selection and application of some molds depends on the specific situation. So what is the introduction of hot work die steel? After understanding these contents, it will have a good reference and value for the purchase of hot work die steel. Here is the further understanding and analysis of hot work die steel.

对于重载、高速磨损条件下服役的模具，要求模具钢表面能形成薄而致密粘附性好的氧化膜，保持润滑作用，减少模具和工件之间产生粘咬、焊合等熔融磨损，又能减少模具表面进行氧化造成氧化磨损。所以模具的工作条件对钢的磨损有较大的影响。

For the die in service under heavy load and high speed wear condition, it is required that thin and dense oxide film with good adhesion can be formed on the surface of die steel to maintain lubrication, reduce melting wear such as sticking and welding between die and workpiece, and reduce oxidation wear on die surface. Therefore, the working conditions of the die have a great influence on the wear of the steel.

（1）硬度是模具钢的主要技术指标，模具在高应力的作用下欲保持其形状尺寸不变，必须具有足够高的硬度。冷作模具钢在室温条件下一般硬度保持在HRC60左右，热作模具钢根据其工作条件，一般要求保持在HRC40～55范围。对于同一钢种而言，在一定的硬度值范围内，硬度与变形抗力成正比；但具有同一硬度值而成分及组织不同的钢种之间，其塑性变形抗力可能有明显的差别。

(1) Hardness is the main technical index of die steel. In order to keep its shape and size unchanged under the action of high stress, the die must have enough high hardness. Generally, the hardness of cold working die steel is about HRC60 at room temperature, while that of hot working die steel is about hrc40-55 according to its working conditions. For the same steel, the hardness is proportional to the deformation resistance within a certain range of hardness value, but the plastic deformation resistance of the steel with the same hardness value but different composition and microstructure may be significantly different.

（2）红硬性在高温状态下工作的热作模具，要求保持其组织和性能的稳定，从而保持足够高的硬度，这种性能称为红硬性。碳素工具钢、低合金工具钢通常能在180～250℃的温度范围内保持这种性能，铬钼热作模具钢一般在550～600℃的温度范围内保持这种性能。钢的红硬性主要取决于钢的化学成分和热处理工艺。

(2) Red hardness the hot working die working at high temperature needs to keep its structure and properties stable, so as to keep enough high hardness. This property is called red hardness. Carbon tool steel and low alloy tool steel can keep this property in the temperature range of 180 ~ 250 ℃, and Cr Mo hot working die steel can keep this property in the temperature range of 550 ~ 600 ℃. The red hardness of steel mainly depends on its chemical composition and heat treatment process.

不同类型的产品的优势和区别是不同的，主要还是根据具体的需求来选择适合的型号和产品。

The advantages and differences of different types of products are different, mainly according to the specific needs to choose suitable models and products.