Plastic mold steel is an important pillar of plastic mold. Plastic mold is to use its own specific shape and size to shape plastic products. Due to the complex shape of plastic products and high requirements for surface roughness, it is difficult to manufacture plastic moulds.

塑料模具钢材不仅具备良好的机械加工性能，更适合复杂的腔型模具加工，金相组织细腻、抛光性能与耐腐蚀性都非常好，山东塑料模具钢不仅具有较高的韧度，还拥有低数值的热膨胀系数，因此倍受注塑加工行业的青睐。如何提高塑料模具的使用寿命？今天山东塑料模具钢厂就带大家详细下：

Plastic mold steel not only has good mechanical processing performance, but also is more suitable for complex cavity mold processing. Its microstructure is fine, polishing performance and corrosion resistance are very good. Shandong plastic mold steel not only has high toughness, but also has low thermal expansion coefficient, which is favored by injection molding industry. How to improve the service life of plastic mould? Today, Shandong plastic mould steel factory will take you to the following details:

1、氮碳共渗。碳氮共渗是将工件表面同时渗入碳、氮两种原子，形成碳氮共渗层的方法，使用这个方法模具变形小、渗速快、成本低，经过这种方法处理后的塑料模具表面硬度极高，抗粘着性、耐磨性和抗咬合性、耐擦伤能力都较高，模具使用寿命可提高2—5倍。

1. Nitrocarburizing. Carbonitriding is a method that infiltrates carbon and nitrogen atoms into the surface of the workpiece to form carbonitriding layer at the same time. Using this method, the deformation of the mould is small, the infiltration speed is fast, and the cost is low. The surface hardness of the plastic mold treated by this method is very high, and the adhesion resistance, wear resistance, bite resistance and scratch resistance are higher. The service life of the mold can be increased by 2-5 times.

2、渗氮。渗氮是在特定温度下和特定介质中使氮原子渗入工件表面的热处理方法。模具经过渗氮后表面硬度、耐磨性、抗疲劳强度及耐蚀性能都大大提高，且由于渗碳处理后的模具。渗氮与渗碳不同，它是在较低温度下进行的，模具变形小，适用于精度要求高的模具。

2. Nitriding. Nitriding is a heat treatment method to make nitrogen atoms penetrate into the surface of workpiece at a specific temperature and in a specific medium. After nitriding, the surface hardness, wear resistance, fatigue strength and corrosion resistance of the die are greatly improved. Nitriding is different from carburizing. It is carried out at a lower temperature. The deformation of the die is small. It is suitable for the mould with high precision.

3、渗碳。不同材质的模具一般采用不同的热处理方法，用低碳钢及低碳合金钢经挤压加工型腔的塑料模具一般都采用渗碳处理方法，它具有渗速快、渗层深、渗层的成分梯度与硬度梯度可方便控制、低成本的特点。这类塑料模具经过渗碳处理后，其表面(0.5～2.0 mm)内含碳量可达0.8%～1.05%。这层渗层经淬火并低温回火处理后，硬度变高，耐磨性和抗疲劳强度也都增加了，从而延长了模具的使用时间。

3. Carburizing. Different heat treatment methods are generally used for different materials of moulds, and carburizing treatment is generally used for plastic moulds with low carbon steel and low carbon alloy steel after extrusion. It has the characteristics of fast carburizing speed, deep carburizing layer, easy control of composition gradient and hardness gradient and low cost. After carburizing, the carbon content in the surface (0.5 ~ 2.0 mm) of this kind of plastic mould can reach 0.8% ~ 1.05%. After quenching and tempering at low temperature, the hardness of the layer increases, the wear resistance and fatigue strength increase, thus prolonging the service life of the die.

随着我国模具钢生产技术的发展迅速，现在已形成了我国自己的模具钢系列。在塑料成型加工中，模具的质量对产品质量的保证作用是不言喻的。

With the rapid development of die steel production technology in China, our own die steel series has been formed. In the plastic molding process, the quality of the mold plays an important role in ensuring the product quality.