所谓热作模具是指对加热再结晶温度以上的金属或合金进行塑性变形的和对液态的有色金属压制成型制造零部件的模具。下面来看看山东热作模具钢本身具备九大特性吧。

The so-called hot working die refers to the die for plastic deformation of metals or alloys heated to above recrystallization temperature and the die for pressing liquid non-ferrous metals to form parts. Now let's take a look at the nine characteristics of Shandong hot work die steel.

①在化学成分方面，含碳量（质量分数）控制在0.30%~0.60%之间。过高含碳量，将使塑性下降，导热性亦较差；过低含碳量，将使硬度和耐磨性不足。

① In terms of chemical composition, the carbon content (mass fraction) shall be controlled between 0.30% and 0.60%. If the carbon content is too high, the plasticity will be reduced and the thermal conductivity will be poor; If the carbon content is too low, the hardness and wear resistance will be insufficient.

钢中常加入Cr、Ni、Mo、Mn、Si、W、V、Ti、Nb等元素，其中Cr、Ni、Mn、Si等元素除起回溶强化作用外，还提高钢的淬透性；Mo、W、V、Ti、Nb等元素在钢中形成碳化物，细化晶粒，提高钢的硬度与耐磨性，也提高钢的回火稳定性和减少钢的回火脆性。在热作模具钢中，Cr、W、Mo等元素的加入量较多，以获得较高的抗热疲劳性。

Cr, Ni, Mo, Mn, Si, W, V, Ti, Nb and other elements are often added into the steel, among which Cr, Ni, Mn, Si and other elements not only play the role of remelting strengthening, but also improve the hardenability of the steel; Mo, W, V, Ti, Nb and other elements form carbides in the steel, refine the grains, improve the hardness and wear resistance of the steel, and also improve the tempering stability of the steel and reduce the tempering brittleness of the steel. In the hot work die steel, Cr, W, Mo and other elements are added more to obtain higher thermal fatigue resistance.

②在组织要求方面，热作模具钢在服役时组织应为：回火索氏体或回火屈氏体或下贝氏体，或回火马氏体+细小颗粒状碳化物（一些压铸模具）。

② In terms of structure requirements, the structure of hot work die steel in service shall be: tempered sorbite or tempered troostite or lower bainite, or tempered martensite+fine granular carbide (some die casting dies).

③在性能要求方面，热作模具钢应具有较高的强度、较高的韧性、较高的回火稳定性、较高的耐热疲劳性、较高的淬透性、较高的导热性、良好的抗氧化性和适中的硬度以及一定的耐磨性、耐蚀性。

③ In terms of performance requirements, hot work die steel should have higher strength, higher toughness, higher tempering stability, higher heat fatigue resistance, higher hardenability, higher thermal conductivity, good oxidation resistance, moderate hardness, and certain wear resistance and corrosion resistance.

④在承受载荷方面，热作模具钢承受冲压应力、挤压应力、热应力、冲击载荷和磨擦力。

④ In terms of bearing load, hot work die steel bears stamping stress, extrusion stress, thermal stress, impact load and friction force.

⑤在使用温度方面，大多数模具使用温度在300~700℃之间，个别在800~850℃之间。

⑤ In terms of service temperature, the service temperature of most moulds is between 300~700 ℃, and that of some moulds is between 800~850 ℃.

⑥在具体使用方面，热作模具钢主要用于制造锤锻模、热挤压模、热镦锻模、精锻模和压铸模。

⑥ In terms of specific use, hot work die steel is mainly used to manufacture hammer forging die, hot extrusion die, hot upsetting forging die, precision forging die and die casting die.

⑦在然造工艺方面，热作模具钢需要多向锻造，并反复多次镦粗与拔长，以获得均匀原始组织。

⑦ In the manufacturing process, the hot work die steel needs to be forged in multiple directions and repeatedly upset and elongated to obtain a uniform original structure.

⑧在热处理工艺方面，退火+淬火+高温回火。除个别钢外，大多数热作模具钢奥氏体化时获得单相奥氏体组织，淬火后获得马氏体+残余奥氏体。多数钢还需在锻造后予以去氢处理。

⑧ In terms of heat treatment process, annealing+quenching+high temperature tempering. Except for individual steels, most hot work die steels obtain single-phase austenite structure during austenitizing, and obtain martensite+residual austenite after quenching. Most steels need to be dehydrogenated after forging.

⑨在切削工艺方面，具有良好的切削加工性。一些钢在淬火前可进午粗略加工，淬火后再进行深精加工。

⑨ In terms of cutting technology, it has good machinability. Some steels can be roughly processed before quenching and then deeply finished after quenching.

实际上在国外热作模具钢分为三种：铬热作模具钢、钨热作模具钢和钼热作模具钢，全部以H命名。分别为H10～H19，H21~H26，和H42、H43。您还需要了解更多相关事项就马上来关注我们https://www.jnqhmj.com吧！

In fact, there are three kinds of hot work die steel abroad: chromium hot work die steel, tungsten hot work die steel and molybdenum hot work die steel, all named after H. H10~H19, H21~H26, and H42 and H43 respectively. If you need to know more about the relevant issues, please come to us immediately https://www.jnqhmj.com Come on!