High-hardness high-hardenability pre-hardening plastic mould steel and preparation method thereof

Abstract

The invention discloses a high-hardness high-hardenability pre-hardening plastic mould steel and a preparation method thereof and belongs to the technical field of tool and mould steels. To be specific, the steel comprises, by weight percentage, 0.40-0.50% of C, 0.2-0.5% of Si, less than or equal to 0.030% of S, less than or equal to 0.030% of P, 0.6-1.0% of Mn, 0.8-1.5% of Ni, 0.6-2.0% of Mo, 1.6-2.5% of Cr, 0.1-0.5% of V and the balance Fe and inevitable impurities. The high-hardness high-hardenability pre-hardening plastic mould steel has the beneficial effects that compared with the priorart, the steel is higher in pre-hardening hardness, toughness and hardenability; the comprehensive performance is more excellent; and the steel can be used for producing a high-hardness large-size pre-hardening plastic mould steel module more easily, so that user requirements are met.

Description

technical field [0001] The invention belongs to the technical field of tool and die steel, and in particular relates to a high-hardness and high-hardenability pre-hardened plastic mold steel and a preparation method thereof. The pre-hardened plastic mold steel has high hardness, high hardenability and excellent comprehensive performance. It is suitable for all kinds of large and extra large plastic mold steels with high polishing performance. Background technique [0002] Plastic products are now widely used as substitutes for metal products, and the amount of high-strength engineering plastics, ultra-high-strength engineering plastics, and resins added with a large amount of GF is increasing. With the widespread use of plastic products in industries such as automobiles and home appliances, the size requirements for mold steel used in the manufacture of plastic product molding molds are increasing. At present, the large-scale plastic mold steel widely used in the market is ...

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