Pre-hardened plastic die steel with oxidation corrosion resistance and high thermal stability and preparation method of pre-hardened plastic die steel

Abstract

The invention discloses pre-hardened plastic die steel with oxidation corrosion resistance and high thermal stability. According to the die steel, based on the element ratio of traditional pre-hardened plastic die steel, the ratio of Ni, Mn, W, Co and other elements is properly increased, and meanwhile the use level of other alloy elements is controlled; on the basis of guaranteeing the mechanical performance of the traditional plastic die steel, the mechanical performance and processing performance of alloy materials are further improved; the pre-hardened plastic die steel has excellent oxidation corrosion resistance and high thermal stability, the surface quality of plastic die pieces is guaranteed, and pouring of plastic pieces of various types can be achieved; and by means of an added rare earth oxide-graphene oxide coated nano tungsten carbide composite modificator, the structure of the die steel is refined, interfacial compatibility of crystals is improved, the reinforcing and toughening effects are remarkable, and the metamorphism effect is even and stable. The die steel is smooth in surface and durable, a preparation method is simple and efficient, the manufacturing cycle is short, and extremely high production and application value is achieved.

Description

technical field [0001] The invention relates to the technical field of plastic mold steel products, in particular to a pre-hardened plastic mold steel with high thermal stability against oxidation and corrosion 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 pro...

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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