High-chromium anticorrosion high-precision pre-hardened plastic die steel and manufacturing method thereof

Abstract

The invention discloses high-chromium anticorrosion high-precision pre-hardened plastic die steel and a manufacturing method thereof. According to the die steel, the ratios of Cr, Mn, Zn, Y and other elements are increased properly based on the element ratio of traditional pre-hardened plastic die steel, meanwhile the consumption of other alloy elements is controlled, and the mechanical property and machining property of an alloy material are further improved on the basis that the mechanical property of the traditional plastic die steel is guaranteed; the die steel is high in heat stability, the die size stability is good, and a plastic part higher in precision can be obtained; and a nano-sized tungsten carbide composite alterant is wrapped by added rare earth oxide-oxidized graphene so that the organizational structure of the die steel can be refined, the interfacial compatibility among crystals is improved, the toughening and reinforcing effect is remarkable, and the metamorphism effect is even and stable. The die steel is compact in surface, resistant to wear and corrosion and durable. The manufacturing method for the high-chromium anticorrosion high-precision pre-hardened plastic die steel is simple, efficient, short in manufacturing cycle and very high in production application value.

Description

technical field [0001] The invention relates to the technical field of plastic mold steel products, in particular to a high-chromium anti-corrosion high-precision pre-hardened plastic mold steel and a preparation method thereof. Background technique [0002] With the rapid development of automobiles, tractors, motors, radios, household appliances and national defense industries, non-cutting processes such as cold stamping, extrusion, die forging and die-casting are widely used, and the demand for molds is increasing. There are also higher and higher requirements for the steel types of the mold, the metallurgical production of the steel and the heat treatment quality of the steel. [0003] At present, the types of die steel mainly include cold work die steel, hot work die steel, plastic die steel, etc., among which plastic die steel accounts for the largest proportion, and the performance of die steel is directly related to the quality of processed plastic products. The char...

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Problems solved by technology

[0003] At present, the types of die steel mainly include cold work die steel, hot work die steel, plastic die steel, etc., among which plastic die steel accounts for the largest proportion, and the performance of die steel is directly related to the quality of processed plastic products. The characteristics of plastic products have high requirements for plastic mold steel in terms of corrosion resistance, dimensional stability, surface wear resistance, and polishing. The existing plastic mold steel mainly has low hardness, poor wear resistance, and the use of Problems to be solved such as low service life and many surface defects