要点一：成型方法
Key point 1: forming method
可选择两种基本材料类型：
You can choose from two basic material types:
1.在模铸、煅烧和挤压过程中，热处理工具钢，能承受较高的温度。
1. Hot working tool steel, which can withstand the relatively high temperature of die casting, forging and extrusion.
2.冷拉工具钢用于切割、切割、冷成型、冷挤压、冷锻和粉末充压。
2. Cold working tool steel, which is used for blanking and shearing, cold forming, cold extrusion, cold forging and powder pressure forming.
注：会产生一些塑料pvc腐蚀性副产物，如塑料。冷疑、腐蚀性物质、酸、制冷/加热、水或储存条件也会带来腐蚀。冷疑、腐蚀性物质、酸、制冷/加热、水或储存条件也会带来腐蚀。长期停产引起的冷疑、腐蚀性物质、酸、制冷/加热、水或储存条件也会被腐蚀。若达到上述情况，最好使用不锈钢模具钢。
Note: some plastics can produce corrosive by-products such as PVC plastics. Factors such as condensation, corrosive gases, acids, cooling / heating, water or storage conditions caused by prolonged shutdown can also cause corrosion. If the above conditions are met, die steel made of stainless steel is recommended.
要点二:磨具规格
Key point 2: mold size
预硬钢常用于大规格磨具。
1. Pre hardened steel is often used in large-size dies.
2.小尺寸磨具常用于整体淬硬钢。
2. Integral hardened steel is often used for small size die.
要点三:磨具使用次数:
Key point 3: mold usage times
1.短期内用软钢磨具，其强度为160mdash;2 50 hrc。
1. The mold used for a short time should be made of mild steel with hardness of 160mdash; 250hrc.
2.中长期磨具采用预硬钢，强度为30145hrc。
2. Pre hardened steel with hardness of 30-45hrc should be used for the mould used for medium and long time.
3.长期使用的磨具应采用高韧性钢，其强度为48mdash;65hrc。
3. High hardness steel should be used for long-term mold, with hardness of 48mdash; 65hrc.
要点四：表面粗糙度
Key point 4: surface roughness
许多塑料模具制造商对更好的表面粗糙度感兴趣；当添加硫金属切割特性时，表面质量降低，硫含量强的钢变脆。
Many plastic mold manufacturers are interested in good surface roughness; when sulfur is added to improve metal cutting performance, the surface quality will decrease, and the steel with high sulfur content will become more brittle.
模具钢对工作特性和特性的要求
Requirements and characteristics of die steel in working performance
强度
hardness
磨具在工作中受力复杂，如果热磨在交换温度场下一般承受交变应力，则必须具有良好的抗软化或塑性变形水平，模具的形状和尺寸精度仍可在长期工作环境中保持。强度是模具钢的重要特性之一。强度是模具钢的重要特性之一。冷模的强度一般为58HRC热作模具，特别是对热疲劳性能要求高的磨具，一般强度为45HRC上下。一般注塑模具的一般强度要求为35HRC左右。
The stress state of the die is complex when it works. For example, the hot working die usually bears alternating stress under the exchange temperature field, so it should have good ability to resist softening or plastic deformation, and can still maintain the shape and dimensional accuracy of the die in the long-term working environment. Hardness is one of the important properties of die steel. Generally, the hardness of cold working dies is above 58hrc, while that of hot working dies, especially those with high thermal fatigue resistance, is about 45hrc. For the common plastic mold, the hardness is about 35hrc.
强度与韧性
Strength and toughness
特别是随着现代快速冲压、快速精密锻造和液体成形技术的发展，磨具在零件的过程中承受着巨大的冲击、扭曲等负荷，磨具承受更多的负载。由于钢的强度和韧性不够，模具热处理后的硬度和韧性通常会导致外腔边缘或部分坍塌、刀头或破裂和初始故障。
In the forming process of parts, the die bears a huge impact, distortion and other loads, especially with the development of modern high-speed stamping, high-speed precision forging, liquid forming and one-step forming technology, the die bears a greater load. Due to the insufficient strength and toughness of steel, the edge or local collapse, edge collapse or fracture of the die cavity lead to early failure It should have high hardness and toughness.
