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A kind of hot working die steel and its efficient preparation method

A high-efficiency technology for hot-work die steel, applied in the field of hot-work die steel and its high-efficiency preparation, can solve the problems of occupying heat treatment furnaces, increasing production costs, and reducing production efficiency, so as to improve production efficiency, reduce production costs, Effect of preventing component segregation

Active Publication Date: 2021-01-08
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires long-term heating and heat preservation, which occupies the heat treatment furnace, reduces production efficiency, and consumes a large amount of gas, which increases production costs.

Method used

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  • A kind of hot working die steel and its efficient preparation method
  • A kind of hot working die steel and its efficient preparation method
  • A kind of hot working die steel and its efficient preparation method

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Embodiment Construction

[0030] The present invention will be described in detail below with reference to the accompanying drawings, but it should be pointed out that the implementation of the present invention is not limited to the following embodiments.

[0031] A hot work die steel, the weight percentage of the chemical composition of the hot work die steel is:

[0032] C: 0.34%-0.45%, Si: 1.00%-1.40%, Mn: 0.50%-0.60%, P≤0.015%, S≤0.015%, Cr: 5.00%-6.00%, Mo: 1.00%-1.20%, Nb: 0.08%-0.12%, Ni: 1.00%-1.30%, and the balance is Fe and inevitable impurities.

[0033] An efficient preparation method for hot work die steel, comprising the following steps:

[0034] 1) Using molten iron pretreatment-converter smelting-out-of-furnace refining (LF+RH) method for smelting, continuous casting of slab to obtain continuous casting billet, rolling and pre-deforming the continuous casting billet, and the deformation amount is controlled at 15%-25% , followed by high temperature homogenization treatment, the continu...

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Abstract

The invention relates to hot-working die steel and an efficient preparation method thereof. The hot-working die steel comprises, by weight, 0.34%-0.45% of C, 1.00%-1.40% of Si, 0.50%-0.60% of Mn, lessthan or equal to 0.015% of P, less than or equal to 0.015% of S, 5.00%-6.00% of Cr, 1.00%-1.20% of Mo, 0.08%-0.12% of Nb, 1.00%-1.30% of Ni, and the balance Fe and inevitable impurities. The preparation method has the advantages that the alloy components are optimized, and mechanical diffusion and thermal diffusion are adopted to jointly act, so that the components of the hot-working die steel are homogenized, the time required for homogenization of the alloy elements is shortened, the production efficiency is improved, the production cost is reduced, the produced hot-working die has the Rockwell hardness of 55-57 HRC, the isotropic performance is good, and the thermal stability is good.

Description

technical field [0001] The invention relates to a hot work die steel and an efficient preparation method thereof. Background technique [0002] In today's world, molds are the main forming tools, and mold technology has become one of the important indicators to measure the level of a country's product manufacturing. In recent decades, with the rapid development of China's economy, it has driven the development of the machinery manufacturing industry and the mold industry, and also promoted the development of mold steel. However, more than 50% of the high-quality mold steel needs to be imported, and some large, precision mold steels need to be imported. , Complex, long-life die steel almost entirely requires imported materials. Hot work tool steel is one of the fastest consuming and most demanding tool steels. Hot work die steel requires materials with high hardenability, high high temperature strength, high wear resistance, high toughness, high thermal crack resistance and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/48C22C38/44C22C38/02C22C38/04C21D8/02
CPCC21D8/0205C21D8/0226C21D8/0247C22C38/02C22C38/04C22C38/44C22C38/48
Inventor 冯丹竹赵坦范刘群石锋涛隋轶李云王勇
Owner ANGANG STEEL CO LTD
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