Hot working die steel has high thermal stability at high temperature (carbon content of hot working die steel)

热作模具钢工作时，承受很大的冲击。模具型腔与高温金属接触，反复加热冷却，使用条件非常恶劣。为了满足热作模具钢的应用要求，热作模具钢应具有以下基本特性:高温强度高，韧性好。热作模具尤其是热锻模具在工作时承受很大的冲击力，冲击频率很高。如果模具没有高强度和良好的韧性，它们将容易破裂。耐磨性好，因为热作模具钢在毛坯变形时不仅要承受摩擦磨损，还要承受高温氧化腐蚀和氧化铁皮屑的打磨，所以热作模具钢需要有较高的硬度和防粘着性。

When hot working die steel, it bears great impact. The mold cavity is in contact with high-temperature metal, heated and cooled repeatedly, and the service conditions are very bad. In order to meet the application requirements of hot work die steel, hot work die steel should have the following basic characteristics: high temperature strength and good toughness. Hot working dies, especially hot forging dies, bear great impact force and high impact frequency. If molds do not have high strength and good toughness, they will be easy to crack. Good wear resistance, because the hot work die steel not only bears friction and wear when the blank is deformed, but also bears high-temperature oxidation corrosion and grinding of iron oxide scurf, so the hot work die steel needs to have high hardness and anti adhesion.

高热稳定性。热稳定性是指钢材在高温下长时间保持其常温力学性能的能力。在热模具中工作时，接触的是炽热的金属甚液态金属，所以模具的表面温度很高，一般为400~700℃。这就要求热作模具钢在高温下不发热，热稳定性高，否则模具会发生塑性变形，导致坍塌失效。

High thermal stability. Thermal stability refers to the ability of steel to maintain its mechanical properties at room temperature for a long time at high temperature. When working in the hot mold, the contact is hot metal or even liquid metal, so the surface temperature of the mold is very high, generally 400 ~ 700 ℃. This requires that the hot working die steel does not heat at high temperature and has high thermal stability, otherwise the die will have plastic deformation and collapse failure.

优异的抗热疲劳性能，热作模具的工作特点是反复加热和冷却，模具一次加热膨胀，另一次冷却收缩，产生很大的热应力，这种热应力是反方向交替产生的。在反复热应力作用下，模具表面会形成网状裂纹(裂纹)，称为热疲劳。热疲劳引起的模具过早断裂是热作模具失效的主要原因之一。因此，热作模具钢一定是具有良好的热疲劳性能。

Excellent thermal fatigue resistance. The working characteristics of hot working die are repeated heating and cooling. The die expands once and shrinks again, resulting in great thermal stress. This thermal stress is generated alternately in the opposite direction. Under the action of repeated thermal stress, network cracks (cracks) will be formed on the die surface, which is called thermal fatigue. The premature fracture of die caused by thermal fatigue is one of the main reasons for the failure of hot working die. Therefore, hot working die steel must have good thermal fatigue properties.

高淬透性。一般热作模具的尺寸都比较大，特别是热锻模具。为了使整个模具截面的机械性能均匀，要求热作模具钢具有高淬透性。良好的导热性。为了防止模具积聚过多热量，导致机械性能下降，需要尽可能降低模具表面温度和模具内部的温差，这就要求热作模具钢具有良好的导热性。良好的成型工艺性能，满足成型需要。

High hardenability. Generally, the dimensions of hot working dies are relatively large, especially hot forging dies. In order to make the mechanical properties of the whole die section uniform, the hot work die steel is required to have high hardenability. Good thermal conductivity. In order to prevent the die from accumulating too much heat, resulting in the decline of mechanical properties, it is necessary to reduce the temperature difference between the die surface and the die interior as much as possible, which requires the hot working die steel to have good thermal conductivity. Good molding process performance to meet the needs of molding.

以上就是为大家介绍的有关山东热作模具钢的详细介绍,希望对您有所帮助.如果您有什么疑问的话,欢迎联系我们.我们将以的态度,为您提供服务https://www.jnqhmj.com

The above is the detailed introduction of Dongdong hot working die steel. I hope it will be helpful to you If you have any questions, please contact us We will provide you with professional service https://www.jnqhmj.com