隨著塑料制品在工業及日常生活中的應用越來越廣泛，塑料模具工業對模具鋼的需求也越來越大。下面山東塑料模具鋼廠家來講講講解常用模具鋼的類別及特性內容吧。

With the application of plastic products in industry and daily life more and more widely, the demand of plastic mold industry for mold steel is also growing. Next, Shandong plastic mold steel manufacturers will talk about the categories and characteristics of common mold steel.

1.滲碳鋼

1. Carburizing steel

滲碳鋼由于退火后的硬度低、塑性好，可以采用冷擠壓法成型，從而提高工效,減低成本。擠壓復雜型腔時，退火后的硬度小于100HBS；擠淺型腔時，小于160HBS，擠壓成型后，經滲碳、淬火和回火處理，表面硬度為53～62HRC。

Due to the low hardness and good plasticity after annealing, the carburized steel can be formed by cold extrusion, thus improving the work efficiency and reducing the cost. When extruding complex cavities, the hardness after annealing is less than 100HBS; When extruding shallow cavity, it is less than 160HBS. After extrusion forming, the surface hardness is 53~62HRC after carburizing, quenching and tempering.

達到表面耐磨性高，心部韌性好的要求。08Cr4NiMoV（LJ）是國內開發的冷擠壓成型專用鋼，具有成型性能優良、滲碳層深、熱處理變形小、耐磨性好等優點。其淬火處理的佳溫度是850℃，回火溫度可視模具工作條件選擇。

It meets the requirements of high surface abrasion resistance and good toughness of the core. 08Cr4NiMoV (LJ) is a special steel for cold extrusion molding developed in China, which has the advantages of excellent molding performance, deep carburizing layer, small heat treatment deformation, and good wear resistance. The best quenching temperature is 850 ℃, and the tempering temperature can be selected according to the working conditions of the die.

2.調質型模具鋼

2. Quenched and tempered die steel

工藝要求是在完成模具機械加工后，再進行調質處理，使模具達到較好的綜合機械性能。一類是45、55等優碳素鋼，適宜于形狀簡單或精度要求不高、使用壽命不長的模具。

The process requirement is to conduct quenching and tempering treatment after the completion of die machining to make the die achieve better comprehensive mechanical properties. The first type is 45, 55 and other high-quality carbon steel, which is suitable for moulds with simple shape, low precision requirements and short service life.

可以選用SM45、SM55等塑料模具專用鋼（YB/T094—1997、YB/T107—1997、YB/T129—1997），此鋼材的純凈度好,力學性能穩定。另一類是合金鋼，可以在調質后進行碳氮共滲，進一步提高耐磨性和抗蝕性。

Special steel for plastic mould such as SM45 and SM55 (YB/T094-1997, YB/T107-1997, YB/T129-1997) can be selected. The steel has good purity and stable mechanical properties. The other is alloy steel, which can be carbonitrided after quenching and tempering to further improve the wear resistance and corrosion resistance.

其中：40CrMo有良好的低溫韌度和低的缺口敏感性，適于制作中型模具。42CrMo屬于高強度鋼，且有較高的疲勞極限，低溫韌性好，適于制造要求一定強度和韌性的大、中型塑料模具。

Among them, 40CrMo has good low temperature toughness and low notch sensitivity, which is suitable for making medium-sized molds. 42CrMo is a high-strength steel with high fatigue limit and good low-temperature toughness. It is suitable for manufacturing large and medium-sized plastic molds that require certain strength and toughness.

38CrMoA1是典型的滲碳鋼，調質后滲氮處理，表面硬度高（大于850HV）并具有一定的抗蝕性。適用于PVC，PC的塑料模具。此外5CrNiMo、5CrMnMo等熱作模具鋼，在塑料模具中主要用于使用溫度較高，耐磨性要求高的模具，如熱固性塑料模。

38CrMoA1 is a typical carburizing steel. After quenching and tempering, it is nitrided, with high surface hardness (more than 850HV) and certain corrosion resistance. Suitable for PVC, PC plastic mold. In addition, 5CrNiMo, 5CrMnMo and other hot work die steels are mainly used in plastic moulds for moulds with high temperature and high wear resistance requirements, such as thermosetting plastic moulds.

3.預硬性塑料模具專用鋼

3. Special steel for pre hardening plastic mould

可以直接使用已經預硬處理的模塊、扁鋼進行加工,避免了加工后再熱處理所造成的各種缺陷，從而提高了模具的制作精度,同時縮短了制作周期。塑料模具鋼的主流品種,可以劃分為一般型和易切削型以及非調質型等幾類。

The pre hardened modules and flat steel can be directly used for processing, avoiding various defects caused by reheat treatment after processing, thus improving the manufacturing accuracy of the mold and shortening the manufacturing cycle. The mainstream varieties of plastic die steel can be divided into general type, free cutting type and non quenched and tempered type.

此外塑料模具鋼的制作成本中，加工和拋光占到了70%～80%，因此在選用模具材料時，應在保證模具使用性能要求的同時，盡可能地提高其加工工藝性能。更多相關事項就來我們網站http://www.6886774.cn咨詢吧！

In addition, processing and polishing account for 70%~80% of the production cost of plastic mold steel. Therefore, when selecting mold materials, the processing performance should be improved as much as possible while ensuring the mold performance requirements. Come to our website for more information http://www.6886774.cn Consult!