High-temperature-abrasion resisting and corrosion resisting pre-hardened plastic die steel and preparation method thereof

Abstract

The invention discloses high-temperature-abrasion resisting and oxidation resisting pre-hardened plastic die steel and a preparation method thereof. According to the die steel, the ratios of elements such as Mn, Co, Cr and Mo are increased on the basis of the element ratios of traditional pre-hardened plastic die steel, meanwhile, the dosage of other alloy elements is controlled, and the strength and hardness of alloys are further improved on the basis of ensuring the mechanical property and the machining property of the traditional plastic die steel; the high-temperature-abrasion resisting and oxidation resisting pre-hardened plastic die steel integrates excellent abrasion resistance and corrosion resistance and can meet the requirement of pouring of various types of plastic parts; the structure of the die steel is further improved by addition of a rare earth oxide-coated nano-tungsten carbide complex modifier, the reinforcing and toughening effects are remarkable, the wettability between the die steel and metal liquid is better, and the modifying effect is uniform and stable. The preparation method of the steel die is simple and efficient, the manufacturing cycle is short, the quality of surfaces of the machined plastic parts is high, and the steel die and the preparation method of the steel die have extremely high production application value.

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 resistant to high temperature, abrasion 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 products....

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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