Pre-hardened Plastic Mold Steel
Pre-hardened plastic mold steel undergoes heat treatment at the factory to achieve the required hardness, typically between 30 and 40 HRC. This material can be directly machined without further heat treatment, avoiding deformation problems caused by heat treatment. Pre-hardened plastic mold steel has good machinability and polishing properties, making it suitable for manufacturing large or complex molds. Its moderate hardness reduces machining difficulty while maintaining mold strength. Common pre-hardened plastic mold steels include different grades, each with slightly different compositions, but all aiming to provide stable mechanical properties and wear resistance. This material is widely used in mold manufacturing for household appliances, daily-use plastic products, and other fields.
Carburized Plastic Mold Steel
Carburized plastic mold steel has a lower carbon content. After carburizing treatment, a high-hardness carburized layer forms on the surface, while the core retains good toughness. This material is suitable for manufacturing molds requiring high surface hardness and wear resistance, while also being able to withstand high impact loads. The surface hardness of molds treated with carburizing can reach over 55 HRC, effectively extending the service life of the molds. Carburizing plastic mold steel requires carburizing and quenching during processing, which increases the complexity of the manufacturing process but meets the production requirements for high mold surface quality. This material is commonly used in molds for manufacturing precision plastic parts such as gears and bearings.
Corrosion-Resistant Plastic Mold Steel
Corrosion-resistant plastic mold steel mainly contains a high proportion of chromium, giving it excellent corrosion resistance. This material is suitable for producing plastic products containing corrosive components such as polyvinyl chloride (PVC). During processing, the decomposition of plastic may produce acidic substances that corrode the mold surface; corrosion-resistant plastic mold steel effectively resists this erosion, maintaining the smoothness of the mold surface. This material also has certain wear resistance and polishing properties, making it suitable for manufacturing molds for transparent plastic products and other products requiring high surface quality. With appropriate heat treatment, the mechanical properties and durability of corrosion-resistant plastic mold steel can be further improved.
Age-hardening Plastic Mold Steel
Age-hardening plastic mold steel is in a softened state after solution treatment and can be machined. Subsequent low-temperature aging treatment causes intermetallic compounds to precipitate, achieving a hardening effect. This material can reach a hardness of 45 to 55 HRC while maintaining good dimensional stability. Age-hardening plastic mold steel is suitable for manufacturing molds with complex structures and high precision requirements because its deformation during processing is minimal, ensuring the dimensional accuracy of the mold. This material is widely used in the manufacture of precision molds in the electronics and medical device industries.
