High-plasticity corrosion-resistant temperature-resistant pre-hardening plastic die steel and preparation method thereof

Abstract

The invention discloses a high-plasticity corrosion-resistant temperature-resistant pre-hardening plastic die steel, and according to the die steel, the ratio of the elements such as Mn, Mo, Cr and Ti are properly improved based on the element ratio of a conventional pre-hardening plastic die steel, meanwhile, the usage of other alloy elements is controlled, so that the mechanical properties and pouring cutting properties of the alloy are further improved on the basis of the mechanical properties and processability of the conventional plastic die steel, and the die steel has excellent strength, wear resistance, high temperature resistance and oxidation resistance and corrosion resistance, is better in plasticity, and easy to cut and form, can be used for pouring plastic parts of various types, moreover, a tissue structure of the die steel is further improved by an added rare earth oxide-cladded nano tungsten carbide composite modifier, so that a reinforcing and toughening effect is obvious, and the wettability with alloy fluid is better, and a metamorphism effect is uniform and stable; a preparation method of the die steel is simple and efficient, short in manufacturing period and capable of greatly improving the quality of plastic products and has high production and application value.

Description

technical field [0001] The invention relates to the technical field of plastic mold steel products, in particular to a high-plasticity anti-corrosion and temperature-resistant 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 produc...

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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