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Hot-working die steel and efficient preparation method thereof

A hot work die steel and high-efficiency technology, applied in the field of hot work die steel and its efficient preparation, can solve the problems of occupying heat treatment furnaces, reducing production efficiency, increasing production costs, etc., so as to improve production efficiency, prevent component segregation, reduce The effect of small production costs

Active Publication Date: 2020-03-06
ANGANG STEEL CO LTD
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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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  • Hot-working die steel and efficient preparation method thereof
  • Hot-working die steel and efficient preparation method thereof
  • Hot-working die steel and efficient preparation method thereof

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with 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 kind of hot work die steel, the weight percentage of the chemical composition of this 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 unavoidable impurities.

[0033] A high-efficiency preparation method for hot work die steel, comprising the following steps:

[0034] 1) The molten iron pretreatment-converter smelting-external refining (LF+RH) method is used for smelting, the slab is continuously cast to obtain a continuous casting slab, and the continuous casting slab is subjected to rolling pre-deformation, and the deformation is controlled at 15%-25% , followed by high-temperature homogeni...

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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 a high-efficiency preparation method thereof. Background technique [0002] Mold is the main molding tool in today's world, and mold technology has become one of the important symbols to measure a country's product manufacturing level. 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 die steel, but more than 50% of high-quality die steel needs to be imported, and some large, precision , 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 temperature strength, high wear resistance, high toughness, high thermal cracking resistance and high melting loss resistance. In recent years, some d...

Claims

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Application Information

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Patent Type & Authority Applications(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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