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High-performance hot work die steel and preparation method thereof

A high-performance technology for hot work die steel, applied in the field of high toughness, high heat crack resistance hot work die steel and its preparation, and high ductility, can solve the problems of high cost and long production cycle, and achieve high purity degree, inhibit the growth of austenite grains, and improve the effect of anisotropy

Active Publication Date: 2022-05-27
江苏宏晟模具钢材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, imported die steel materials from abroad have disadvantages such as high cost and long production cycle. In order to meet the needs of industry development and customer use, it is urgent to design and produce a new type of hot work die steel to gradually replace imported materials under customer conditions. To maximize the benefits for customers

Method used

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  • High-performance hot work die steel and preparation method thereof
  • High-performance hot work die steel and preparation method thereof
  • High-performance hot work die steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A hot work die steel basically consists of the elements in Table 1 according to the mass fraction:

[0052] Table 1

[0053]

[0054] Its preparation method, the main steps are as follows:

[0055] S1, electric furnace smelting:

[0056] According to the preparation of scrap steel and alloy materials in advance according to Table 1, scrap steel is first smelted in batches according to the smelting weight in the electric furnace, and the molten steel temperature is 1645 ℃ for oxidation and slag removal. After the slag removal, alloy materials, lime and fluorite are added to adjust the chemical composition and Dephosphorization, the tapping temperature is 1630 ℃, aluminum wire is added during the tapping process, and the aluminum wire is added at 1kg / t for deoxidation.

[0057] S2, ladle refining furnace refining:

[0058] After the electric furnace smelting, the molten steel is transferred to the ladle, hoisted to the refining furnace base, and added with slag CaO ...

Embodiment 2

[0075] A hot work die steel, according to the mass fraction, basically consists of the elements in Table 2:

[0076] Table 2

[0077]

[0078] Its preparation method, the main steps are as follows:

[0079] S1, electric furnace smelting:

[0080] According to the preparation of scrap steel and alloy materials in advance according to Table 2, scrap steel is first smelted in batches according to the smelting weight in the electric furnace, and the molten steel temperature is 1640 ℃ to oxidize the slag. Dephosphorization, the tapping temperature is 1630 ℃, aluminum wire is added during the tapping process, and the aluminum wire is added at 1.0kg / t for deoxidation.

[0081] S2, ladle refining furnace refining:

[0082] After the electric furnace smelting, the molten steel is transferred to the ladle, hoisted to the refining furnace base, and added with slag CaO and CaF. 2 , C-Si powder is reduced to form white slag, and alloy material is added according to the actual compos...

Embodiment 3

[0099] A hot work die steel, according to the mass fraction, basically consists of the elements in Table 3:

[0100] table 3

[0101]

[0102] Its preparation method, the main steps are as follows:

[0103] S1, electric furnace smelting:

[0104] According to the preparation of scrap steel and alloy materials in advance according to Table 3, scrap steel is first smelted in batches according to the smelting weight in the electric furnace, and the molten steel temperature is 1645 ℃ for oxidation and slag removal. After the slag removal, alloy materials, lime and fluorite are added to adjust the chemical composition and Dephosphorization, the tapping temperature is 1630 ℃, aluminum wire is added during the tapping process, and the aluminum wire is added at 1kg / t for deoxidation.

[0105] S2, ladle refining furnace refining:

[0106] After the electric furnace smelting, the molten steel is transferred to the ladle, hoisted to the refining furnace base, and added with slag CaO ...

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Abstract

The invention relates to a preparation method of high-performance hot work die steel, which is characterized in that on the basis of H13 steel components, alloy components are optimized by adopting a component design thought of microalloying of low C, low Si, high Mo and composite Ni, and meanwhile, the production process is strictly controlled; the specific process route is as follows: electric furnace smelting, ladle refining furnace refining, vacuum refining furnace refining, inert gas shielding electrode blank casting, protective atmosphere constant melting speed electroslag furnace remelting, high-temperature homogenization treatment, multi-directional forging, pre-treatment after forging and ultra-refining treatment production process are adopted at the same time. The invention further relates to the high-performance hot work die steel, the product is uniform in annealed microstructure structure, good in spheroidized structure, fine and uniform in grain distribution and uniform in quenched and tempered structure, fine precipitated phases of Mo, Cr and V carbides play a role in dispersion strengthening in the using process, meanwhile, a proper amount of Ni element can increase hardenability and refine grains, and the hardness of the die steel is improved. And the toughness and fatigue resistance of the steel are improved.

Description

technical field [0001] The invention relates to a die steel and a preparation method thereof, in particular to a hot work die steel with high toughness, high ductility and high thermal crack resistance and a preparation method thereof. Background technique [0002] With the development of modern industry, the application of molds is more and more extensive. In automobiles, electronics, instrumentation, home appliances, aerospace, building materials, motors and communication equipment, about 60%-80% of the parts and components have to rely on The mold is processed and formed, so it is called the "mother of industry". It is estimated that the proportion of molds that can drive related industries is about 1:100, that is, the development of molds is 100 million yuan, which can drive related industries 10 billion yuan. [0003] The total industrial output value of the world's mold industry has maintained continuous growth. At present, my country's total production of mold steel ...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46B21J5/00C22B9/18C21D8/00
CPCC22C33/04C22C38/04C22C38/02C22C38/44C22C38/46C22C38/42B21J5/002C22B9/18C21D8/005Y02P10/20
Inventor 关海龙偶正伟韩忠良朱伟峰王光伟丁海峰苏旭廷蒋海清丁涛乙海峰
Owner 江苏宏晟模具钢材料科技有限公司
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