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High-heat-resistance hot work die steel and preparation method

A technology of hot work die steel and high heat resistance, applied in the field of high heat resistance hot work die steel, can solve problems such as limited application fields, and achieve the effects of simple preparation process, good application value, and high thermal fatigue resistance.

Active Publication Date: 2015-11-04
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the current situation of the above-mentioned hot work die steel, many domestic and foreign steel mills and research institutions are committed to the development of new high-performance hot work die steel, and have achieved certain research results. A large number of hot work die steels have been developed, but they are more Most of them focus on a certain aspect of performance, so their application fields are limited

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Embodiment Construction

[0026] The following examples describe the present invention in more detail.

[0027] The high-performance hot-work die steel described in the present invention realizes high performance by optimizing the alloy composition and optimizing the preparation process. Its preparation method is: (1) Melting and alloying: according to C is 0.38% to 0.44%, Cr is 3.8% to 4.4%, Mo is 1.8% to 2.4%, Si is 0.2% to 0.6%, and Mn is 0.5%. ~0.8%, V 0.5%~0.7%, Ni 0.8%~1.2%, Cu 0.02%~0.05%, Ta 0.08%~0.12%, Nb 0.01%~0.03%, W 0.008%~0.016 %, Co is 0.008% to 0.016%, P and S content are both less than 0.030%, and the balance is the mass percentage of Fe for alloying, batching, smelting, and chemical composition analysis before the furnace, until the chemical composition meets the requirements before tapping; (2) Heat treatment process: the annealing process is: heating temperature is 700-730 ℃, heat preservation 4-6h, cooling with the furnace; rough machining after annealing; quenching and tempering...

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Abstract

The invention provides high-heat-resistance hot work die steel and a preparation method. The high-heat-resistance hot work die steel comprises the following chemical components in percentage by mass: 0.38-0.44% of C, 3.8-4.4% of Cr, 1.8-2.4% of Mo, 0.2-0.6% of Si, 0.5-0.8% of Mn, 0.5-0.7% of V, 0.8-1.2% of Ni, 0.02-0.05% of Cu, 0.08-0.12% of Ta, 0.01-0.03% of Nb, 0.008-0.016% of W, 0.008-0.016% of Co, P and S both less than 0.030%, and the balance of Fe. The steel is tapped until the chemical components are accordant with the requirements through the steps of alloying, burdening, smelting and analysis of stokehole chemical components; and then, the treatments of annealing, quenching and tempering are performed. The steel is excellent in comprehensive mechanical performance, high in heat fatigue resistance and excellent in heat stability and high-temperature strength; meanwhile, the steel carbon and the alloy element are lower in content; the production cost is low; the preparation procedures are simple; and the application value is excellent.

Description

technical field [0001] The invention relates to a high heat resistance hot work die steel, and also relates to a preparation method of the high heat resistance hot work die steel. Background technique [0002] Hot work forming is a near-net forming technology. Due to its high forming efficiency and low loss, it is widely used in industrial production. The development level of its technology has become an important indicator to measure the level of the national manufacturing industry. The most important thing in hot forming technology is the alloy steel material used to manufacture hot work dies. Hot work dies generally work under harsh working conditions such as high temperature and thermal shock. Therefore, hot work die steel is required to have excellent comprehensive properties. At present, H13 steel is widely used in industrial production. Working below 600°C, H13 steel has good thermal stability and thermal fatigue resistance, and a good combination of strength and tou...

Claims

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Application Information

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IPC IPC(8): C22C38/48C22C33/04
Inventor 赵成志张贺新金天文
Owner HARBIN ENG UNIV
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