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Pre-hardened plastic die steel having high acid corrosion resistance and preparation method thereof

A plastic mold steel and mold steel technology, applied in the field of plastic mold steel products, can solve the problems of many surface defects, low service life, poor wear resistance, etc., and achieve the effect of significant strengthening and toughening, short manufacturing cycle, and improved surface quality

Inactive Publication Date: 2015-12-30
WUHU BAOYI AMUSEMENT EQUIP
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  • Abstract
  • Description
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  • Application Information

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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

Method used

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Embodiment Construction

[0013] The weight percent of each component in the die steel of this example is: C: 0.4%, Si: 0.5%, Mn: 1.5%, Cr: 7.5%, Mo: 0.4%, V: 0.1%, Ni: 3.0%, Mg : 1.0%, P≤0.02%, S≤0.01%, compound modifier: 0.01%, the rest is Fe and unavoidable impurities.

[0014] Wherein the composite modificator is made of the following raw materials in parts by weight: nano-rare earth oxide 2, nano-titanium carbide 8, graphene oxide 1, appropriate amount of absolute ethanol, PEG-4000.1; its preparation method is: first dissolve PEG-400 in Add nano-rare earth oxides and graphene oxide to absolute ethanol, and ultrasonically stir for 40 minutes. After they are completely dispersed, add nano-titanium carbide and continue ultrasonically stirring for 1 hour. After stirring, dry them in an oven at 350°C. After drying, the powder is fully ground and dispersed to obtain a composite modificator in which rare earth oxide graphene oxide is compositely coated with nano-titanium carbide.

[0015] The preparatio...

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PUM

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Abstract

The invention discloses pre-hardened plastic die steel having high acid corrosion resistance. According to the die steel, proportions of elements such as Cr, Mo, V, Mg and the like are properly increased on the basis of proportions of elements of traditional pre-hardened plastic die steel, meanwhile, usage amounts of other alloy elements are controlled, mechanical properties and processability of an alloy material are further improved on the basis that mechanical properties of the traditional plastic die steel are guaranteed, the die steel has the excellent acid corrosion resistance and is low in corrosion ratio at the high temperature, the surface is not abraded easily, by means of an added compound modifier formed by coating a nano tungsten carbide with rare-earth oxide-graphene oxides, the organizational structure of the die steel is refined, the interfacial compatibility among crystals is improved, strengthening and toughening effects are significant, and the modification effect is uniform and stable. A preparation method of the die steel is simple and efficient, the manufacturing period is short, and the die steel is durable, can effectively improve surface quality of plastic pieces and has great production and application value.

Description

technical field [0001] The invention relates to the technical field of plastic mold steel products, in particular to a highly acid-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 products. The characteristics of plastic...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/46C22C33/04
Inventor 张庆
Owner WUHU BAOYI AMUSEMENT EQUIP
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