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Reinforced type mold steel and preparation method thereof

A die steel and reinforced technology, applied in the field of reinforced die steel and its preparation, can solve problems such as insufficient performance of die steel, and achieve the effects of improving performance indicators, improving tempering resistance, and improving impact toughness.

Inactive Publication Date: 2019-04-12
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a reinforced mold steel and its preparation method, which can effectively solve the problem of insufficient performance of the mold steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A reinforced die steel comprising the following components by weight percentage:

[0029] 0.8%C, 1.0%Si, 5%Cr, 1.0%Mn, 0.4%Mo, 0.08%Al, 0.02%CaO, 0.5%V, 0.02%CaC 2 , the balance being Fe.

[0030] The preparation method of above-mentioned reinforced mold steel comprises the following steps:

[0031] (1) Mix C, Si, Cr, Mn, Al, V and Mo according to the formula, heat and melt at 1500-2000°C under an argon atmosphere, and then spray CaO and CaC 2 , continue to melt for 3 hours, remove the upper layer material that floats up, and collect molten steel;

[0032] (2) Under the condition of 10MPa, pour molten steel into a piece, then heat it at 900°C for 3h, then raise the temperature to 1300°C at a rate of 140°C / h, and keep it warm for 1h;

[0033] (3) The product obtained in step (2) is forged at 1000°C for 1 hour, then quenched at 860°C, and tempered at 160°C.

[0034] According to GB / T10561-2005 A-method inspection and rating, the prepared mold steel inclusions are insp...

Embodiment 2

[0036] A reinforced die steel comprising the following components by weight percentage:

[0037] 0.8%C, 1.0%Si, 4.5%Cr, 0.5%Mn, 0.2%Mo, 0.02%Al, 0.02%CaC 2 , the balance being Fe.

[0038] The preparation method of above-mentioned reinforced mold steel comprises the following steps:

[0039] (1) Mix C, Si, Cr, Mn, Al and Mo according to the formula, heat and melt under argon at 1500°C, and then spray into CaC 2 , continue to melt for 5 hours, remove the upper layer material that floats up, and collect molten steel;

[0040] (2) Under the condition of 15MPa, pour molten steel into a piece, then heat it at 800°C for 1h, then raise the temperature to 1500°C at a rate of 100°C / h, and keep it warm for 2h;

[0041] (3) The product obtained in step (2) is forged at 1200°C for 2 hours, then quenched at 900°C, and tempered at 300°C.

[0042] According to the A method inspection and rating of GB / T10561-2005, the prepared mold steel inclusions are inspected. Among them, the A type (s...

Embodiment 3

[0044] A reinforced die steel comprising the following components by weight percentage:

[0045] 1.5%C, 1.0%Si, 5%Cr, 1.0%Mn, 0.4%Mo, 0.1%Al, 0.05%CaO, 0.08%CaC 2 , the balance being Fe.

[0046] The preparation method of above-mentioned reinforced mold steel comprises the following steps:

[0047] (1) Mix C, Si, Cr, Mn, Al and Mo according to the formula, heat and melt at 2000°C under an inert gas atmosphere, and then spray CaO and CaC 2 , continue to melt for 3 hours, remove the upper layer material that floats up, and collect molten steel;

[0048] (2) Under the condition of 12MPa, pour molten steel into a piece, then heat it at 900°C for 1~3h, then raise the temperature to 1500°C at a rate of 200°C / h, and keep it warm for 2h;

[0049] (3) The product obtained in step (2) is forged at 1200°C for 2 hours, then quenched at 900°C, and tempered at 300°C.

[0050] According to GB / T10561-2005 A-method inspection and rating, the prepared mold steel inclusions are inspected, am...

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Abstract

The invention discloses reinforced type mold steel and a preparation method thereof. The mold steel comprises, by mass percentage, 0.8-1.5% of C, 1.0-2.0% of Si, 4.5-5% of Cr, 0.5-1.0% of Mn, 0.2-0.6%of Mo, 0.02-0.1% of Al, 0-0.05% of CaO, 0.02-0.08% of CaC2, and the balance Fe. The preparation method of the mold steel includes the steps that (1) C, Si, Cr, Mn, Al and Mo are mixed according to the formula, heating fusion is performed under the atmosphere of inert gas, then CaO and CaC2 are sprayed in, fusion continues, and molten steel is collected; (2) the molten steel is cast into a piece,heating is performed, and then temperature rising is performed; and (3) a product obtained in the step (2) is subjected to forging, quenching and tempering treatment. The mold steel prepared through the method is low in inclusion content, and the impacting resisting toughness, the impacting resisting strength and other performance are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of mold steel preparation, and in particular relates to a reinforced mold steel and a preparation method thereof. Background technique [0002] my country is the largest steel producing country in the world. In 2015, it produced about 800 million tons of steel and exported 110 million tons of steel products. However, there is still a big gap between the production technology of high-end steel materials and advanced countries in the world. Many special materials must rely on imports. , In 2015, it imported 3.9 million tons of high-end special materials, including about 200,000 tons of tool and die steel, worth about 20 billion yuan. [0003] Mold is the mother of industrial manufacturing. 60% of industrial products need to use molds to produce various products. In 2015, the output value of mold industry has exceeded 2 trillion yuan. The annual consumption of various die steels is about 10 million tons. A lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C21D1/18
CPCC21D1/18C22C33/04C22C38/002C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24
Inventor 栾道成陈宝书胡志华王正云左城铭李缘孙建国
Owner XIHUA UNIV
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