High-temperature steam corrosion resistant pre-hardened plastic die steel and preparation method thereof

Abstract

The invention discloses high-temperature steam corrosion resistant pre-hardened plastic die steel. According to the die steel, the matching ratio of Mn, Gr, Zr and other elements is increased on the basis of the matching ratio of elements of the traditional pre-hardened plastic die steel, the use amount of other alloy elements is controlled, the corrosion resistance of hot steam resistant components of an alloy is further improved on the basis of the fact that the mechanical property and processability of the traditional plastic die steel are guaranteed, the possibility of fatigue fracture is low, the requirements for pouring various plastic components can be met, the organization structure of the die steel is further improved by virtue of the added rare earth oxide coated nano tungsten carbide composite modifier, the reinforcing and toughening effect is remarkable, the wetting property with molten metal is better, and the modification effect is uniform and stable. The preparation method of the die steel is simple and efficient, the manufacture period is short, the die steel is durable in use, the surface of a die block is smooth and free of cracks, and the processing quality of a plastic die is greatly improved.

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-heat steam corrosion and a preparation method thereof. Background technique [0002] With the rapid development of automobiles, tractors, motors, radios, household appliances and the national defense industry, non-cutting processing techniques such as cold stamping, extrusion, die forging and die-casting have been widely used. The demand for molds is increasing and the manufacturing Die steel varieties, steel metallurgical production and steel heat treatment quality have also put forward higher and higher requirements. [0003] At present, the types of mold steel mainly include cold work mold steel, hot work mold steel, plastic mold steel, etc. Among them, plastic mold steel accounts for the largest proportion. The use performance of mold steel is directly related to the quality of processed plastic products. The c...

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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