具有足夠的表麵硬度和耐磨性：塑料模具的一般硬度通常在50-60HRC以下，熱處理後模具應具有足夠的表麵硬度，以確保模具具有足夠的剛性（xìng）。模具在工作中由於填充（chōng）和流動的塑料承（chéng）受較大的壓縮應力和摩擦，要求模具（jù）保持其形狀的精度和尺寸（cùn）精度的穩定性，以確保（bǎo）模具（jù）具有足夠的使用壽命。模具耐（nài）磨性（xìng）取決於鋼的化學成（chéng）分（fèn）和（hé）熱處理硬度，因此（cǐ）提高模具（jù）的硬度有利於提高其耐磨性。
Sufficient surface hardness and wear resistance: the general hardness of plastic molds is usually below 50-60hrc. After heat treatment, the molds shall have sufficient surface hardness to ensure that the molds have sufficient rigidity. Because the filled and flowing plastics bear large compressive stress and friction, the mold is required to maintain the stability of shape accuracy and dimensional accuracy, so as to ensure that the mold has sufficient service life. The wear resistance of die depends on the chemical composition and heat treatment hardness of steel, so improving the hardness of die is helpful to improve its wear resistance.
優（yōu）良的機械加工性（xìng）：大多數塑料模具（jù），除了EMD加工外需要一定程度的切割和（hé）鉗工修理。為延長切削刀具的使用壽命，提高切削性能（néng），降低表麵粗（cū）糙度，塑（sù）料模具鋼（gāng）的（de）硬度（dù）必須適當
山東模具製（zhì）造廠（chǎng）家
Excellent machinability: most plastic molds need a certain degree of cutting and fitter repair in addition to EMD processing. In order to prolong the service life of cutting tools, improve cutting performance and reduce surface roughness, the hardness of plastic die steel must be appropriate.
良好的拋光性能：優良塑料製品，要（yào）求表（biǎo）麵粗糙度（dù）小。用（yòng）於此目的的鋼材需要較少的材料雜質，組織細微均勻，無纖維方向，拋光不應出現點（diǎn）蝕或（huò）桔皮樣缺陷。
Good polishing performance: excellent plastic products, requiring small surface roughness. The steel used for this purpose needs less material impurities, fine and uniform structure, no fiber direction, and there shall be no pitting or orange peel like defects in polishing.
良好的熱穩定性：注塑模具部件的形狀（zhuàng）往往比較複雜，淬（cuì）火後難以加工，應盡量使用良好的熱穩定性，當模具加工熱處理後由於線膨脹係數小，熱處理變形小，由於（yú）尺寸變化率小，金（jīn）相組織和模具尺寸穩定，可以減（jiǎn）少或不再（zài）加工的溫差，可（kě）以保（bǎo）證模具尺寸精度和表麵粗糙度的要求。
Good thermal stability: the shape of injection mold parts is often complex and difficult to process after quenching. Good thermal stability should be used as much as possible. After mold processing and heat treatment, due to small linear expansion coefficient and small heat treatment deformation, small size change rate and stable metallographic structure and mold size, the temperature difference can be reduced or no longer processed, It can meet the requirements of die dimensional accuracy and surface roughness.
