Process for producing H13 hot work die steel

A technology of hot work die steel and production process, which is applied in the field of metallurgy, can solve the problems of low service life of the die, composition segregation, non-densification, etc., and achieve the effects of increasing labor productivity, improving thermal fatigue resistance, and increasing service life

Inactive Publication Date: 2014-08-13
南平市双友金属有限公司
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Problems solved by technology

[0002] 4Cr5MoSiV1 (H13) hot work die steel is a steel grade developed in my country according to the American H13 hot work die steel production standard. Compared with imported products of the same steel type, domestic products have lower high temperature strength and thermal fatigue performance. Good strength but poor toughness, good toughness but poor thermal strength", so domestic products are often mainly imported
At present, the production of H13 hot work die steel is only through the control of alloy composition, and is produced through traditional electroslag remelting. The product has defects such as low purity, non-compactness, composition segregation, many inclusions, and coarse grains, which lead to poor performance of the product. Poor, the service life of the mold is low, and the mold will have early cracking and other failure phenomena during use

Method used

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  • Process for producing H13 hot work die steel
  • Process for producing H13 hot work die steel
  • Process for producing H13 hot work die steel

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Embodiment

[0018] 1. Ingredients and smelting

[0019] Batching and electric furnace smelting are carried out according to the following chemical composition requirements:

[0020] C: 0.38~0.44wt%; Si: 0.90~1.20wt%; Mn: 0.35~0.50wt%; P: ≤0.020wt%; S: ≤0.020wt%; Cr: 4.95~5.45wt%; 1.60wt%; V: 0.90-1.20wt%.

[0021] Specifically, the electric furnace smelting process regulations are as follows:

[0022] 1.1. Check the corrosion condition of the furnace body before charging. When repairing the furnace, use 0-1# magnesia and appropriate amount of glass water to mix it evenly, and smooth it when repairing the furnace.

[0023] 1.2. In order to keep the steelmaking materials clean and dry, the deoxidized materials must be baked and dried before use, otherwise they cannot be used.

[0024] 1.3. Add lime with 1% material weight to the bottom of the furnace, and then add the baked materials into the furnace evenly. Any waste module containing aluminum shall not be added into the furnace, and i...

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Abstract

The invention relates to a process for producing H13 hot work die steel, aiming to solve the problem that the present H13 hot work die steel universally has problems of 'good heat resistance and poor toughness or good toughness and poor heat resistance'. The chemical components of the 4Cr5MoSiV1(H13) hot work die steel are reasonably designed and adjusted to control the content of alloy elements such as Cr, Mo, V and Si and exert the interaction of the alloy elements, so that grains are thinned and distributed uniformly; meanwhile, by optimizing an electroslag remelting technology, a forging technology and a thermal treatment technology, the purity and compactness of the steel are improved, segregation is reduced, the mechanical property and isotropy of the steel are further improved, the heat uniformity of a forged part is ensured, a carbide ball structure with stable size and uniform distribution is obtained, and therefore the mechanical property and service life of a product are improved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a production process of H13 hot work die steel. Background technique [0002] 4Cr5MoSiV1 (H13) hot work die steel is a steel grade developed in my country according to the American H13 hot work die steel production standard. Compared with imported products of the same steel type, domestic products have lower high temperature strength and thermal fatigue performance. Good strength but poor toughness, good toughness but poor thermal strength", so domestic products are often imported. At present, the production of H13 hot work die steel is only through the control of alloy composition, and is produced through traditional electroslag remelting. The product has defects such as low purity, non-compactness, composition segregation, many inclusions, and coarse grains, which lead to poor performance of the product. Poor, the service life of the mold is low, and the mold will have early...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/24C22B9/18C21D8/00
Inventor 沈金森
Owner 南平市双友金属有限公司
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