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High-performance hot work die steel and production process thereof

A technology of hot work die steel and production process, applied in the field of special steel forgings, can solve the problems of hot strength, thermal crack resistance, fatigue resistance and hardenability that need to be improved, and can not meet customer requirements, so as to improve hardenability. The effect of improving the anti-fatigue ability, improving the anti-fatigue ability and high anti-fatigue ability

Inactive Publication Date: 2020-04-24
潘少俊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, hot work dies are developing in the direction of large size, precision, and long life, which puts forward higher requirements for the performance of hot work die steel. H13 steel can no longer meet customers' requirements for the use of die performance. Hot cracking resistance, fatigue resistance and hardenability all need to be improved

Method used

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  • High-performance hot work die steel and production process thereof
  • High-performance hot work die steel and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, a production process of high-performance hot work die steel, comprising the following steps: S1, determining the chemical composition: the chemical composition of the hot work die steel billet is calculated by weight percentage: C: 0.36%; Si: 0.10%; Mn : 0.20%; Cr: 4.7%; Mo: 2.4%; V: 0.50%; Ni: 0.40%; S: 0.001%; ​​P: 0.0005%; Fe balance;

[0022] S2, electric arc furnace smelting: put the hot work die steel billet composed of the components described in step S1 into an electric arc furnace and heat it to 1550°C and melt it into molten steel;

[0023] S3, refining outside the furnace: pour the molten steel obtained in the step S2 into the filtering clad steel refining furnace, remove non-metallic impurities such as phosphorus and sulfur to improve the purity of raw materials, and obtain high-purity molten steel;

[0024] S4. Casting: take the high-purity molten steel obtained in step S3 and cast it into a hot work mold steel casting mold, and obtain a bille...

Embodiment 2

[0029] Embodiment 2, a production process of high-performance hot work die steel, including the following steps: S1, determine the chemical composition: the chemical composition of the hot work die steel billet is calculated by weight percentage: C: 0.37%; Si: 0.3%; Mn : 0.40%; Cr: 5.00%; Mo: 2.5%; V: 0.60%; Ni: 0.50%; S: 0.0015%; P: 0.001%; ​​Fe balance;

[0030] S2, electric arc furnace smelting: put the hot work die steel billet composed of the components described in step S1 into an electric arc furnace and heat it to 1600°C and melt it into molten steel;

[0031] S3, refining outside the furnace: pour the molten steel obtained in the step S2 into the filtering clad steel refining furnace, remove non-metallic impurities such as phosphorus and sulfur to improve the purity of raw materials, and obtain high-purity molten steel;

[0032] S4. Casting: take the high-purity molten steel obtained in step S3 and cast it into a hot work mold steel casting mold, and obtain a billet a...

Embodiment 3

[0037] Embodiment 3, a production process of high-performance hot work die steel, including the following steps: S1, determine the chemical composition: the chemical composition of the hot work die steel billet is calculated by weight percentage: C: 0.39%; Si: 0.50%; Mn : 0.60%; Cr: 5.3%; Mo: 2.6%; V: 0.70%; Ni: 0.70%; S: 0.002%; P: 0.0015%; Fe balance;

[0038] S2, electric arc furnace smelting: put the hot work die steel billet composed of the components described in step S1 into an electric arc furnace and heat it to 1650°C and melt it into molten steel;

[0039]S3, refining outside the furnace: pour the molten steel obtained in the step S2 into the filtering clad steel refining furnace, remove non-metallic impurities such as phosphorus and sulfur to improve the purity of raw materials, and obtain high-purity molten steel;

[0040] S4. Casting: take the high-purity molten steel obtained in step S3 and cast it into a hot work mold steel casting mold, and obtain a billet afte...

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Abstract

The invention relates to the technical field of special steel forge pieces, in particular to high-performance hot work die steel and a production process thereof. The high-performance hot work die steel is prepared from, by weight, 0.36-0.39% of C, 0.10-0.50% of Si, 0.20-0.60% of Mn, 4.7-5.3% of Cr, 2.4-2.6% of Mo, 0.50-0.70% of V, 0.40-0.70% of Ni, 0.002% or less of S, 0.015% or less of P and thebalance Fe. The preparation process comprises the steps of electric arc furnace melting, external refining, pouring, electroslag remelting in protective atmosphere, smithing, high-temperature diffusion and spheroidizing annealing. In the high-performance hot work die steel and the production process thereof, the proportion of the raw materials of the hot work die steel is optimized, an optimizedChemical composition scheme for the hot work die steel is provided, the heat intensity, hardness and toughness of the steel can be improved, the critical transition temperature during heating and cooling of the steel can be increased, and the strength and toughness are improved. By adding the Ni element, the quenching degree of the die steel is increased, the plasticity and toughness of the steelcan be improved at the same strength, and the service life of a die can be greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of special steel forging technology, in particular to a high-performance hot-work die steel and its production process. Background technique [0002] Hot work die steel refers to the alloy steel used in dies suitable for hot deformation processing of metals such as magnesium and aluminum, such as hot forging dies, hot extrusion dies, die-casting dies, etc. For example, H13 steel was first developed by the United States in the second half of the last century. Because of its excellent hardenability, good toughness, high wear resistance, and good thermal fatigue resistance, among hot work die steels, H13 steel The comprehensive performance is very outstanding, so it was quickly accepted by manufacturers and became the mainstream hot work die steel, and was gradually adopted by developed countries in the world. The main characteristics of H13 steel are: ①High hardenability and high toughness; ②Excellent thermal...

Claims

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Application Information

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IPC IPC(8): C22C33/04C22C38/02C22C38/04C22C38/44C22C38/46C21D8/00C22B9/20
CPCC21D8/005C21D2211/005C21D2211/008C22B9/20C22C33/04C22C38/02C22C38/04C22C38/44C22C38/46
Inventor 潘少俊
Owner 潘少俊
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