Refining method of high-speed tool steel

A technology of high-speed tool steel and high-speed steel, which is applied in the direction of improving process efficiency to achieve the effects of strengthening refining function, improving yield and thin eutectic carbide network

Inactive Publication Date: 2013-03-06
大连永宝新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this patented method has achieved obvious technical effects in improving the cleanliness of high-speed steel, due to the pressure of the recent sharp increase in the price of rare earth metals and the fluctuation of steel prices, it is urgent to find a new method for refining high-speed steel recycled materials

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  • Refining method of high-speed tool steel
  • Refining method of high-speed tool steel

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1, the refining of M2 high-speed tool steel recycled materials.

[0018] Get the metal material that 1.4 tons of high-speed tool steel scraps and 0.4 tons of low-carbon carbon steel scraps form and an appropriate amount of alloying agent are raw materials, and the alloying agent of the present invention is to carry out composition Conventional alloys containing Si, Mn, Cr, Mo, V, W and other elements required for adjustment;

[0019] Putting the above-mentioned high-speed steel scrap and low-carbon carbon steel scrap into an intermediate frequency induction furnace for melting;

[0020] Adding 1.2% of metal material fluorite and carbon powder to make slag, the ratio of fluorite and carbon powder is 1:2;

[0021] After the above-mentioned metal materials in the furnace are completely melted, Al powder and C powder are added on the slag surface for diffusion deoxidation. According to the chemical composition analysis of the molten steel, use the above-mentioned ...

Embodiment 2

[0025] Embodiment 2, the preparation method of M3 high-speed steel flat wire.

[0026] Get 1.4 tons of high-speed steel waste chips and 0.65 tons of low-carbon carbon steel scrap steel scrap metal material and an amount of alloying agent as raw material, the definition of this alloying agent is the same as embodiment 1;

[0027] Putting the above-mentioned high-speed steel scrap and low-carbon carbon steel scrap into an intermediate frequency induction furnace for melting;

[0028] Add 1.5% of metal material fluorite and carbon powder to make slag, the ratio of the fluorite and carbon powder is 1:2.

[0029] Add Al powder and C powder on the slag surface for diffusion deoxidation treatment. According to the chemical composition analysis of the molten steel, use the alloying agent mentioned above to adjust the chemical composition of the steel; when the temperature of the molten steel reaches 1520°C-1560°C, remove the slag layer on the surface of the molten steel, then insert ...

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Abstract

The invention relates to a refining method of high-speed tool steel. The method comprises the steps that: a raw material is smelted in an induction furnace, and LF furnace ingot refining is carried out; and the refined molten steel is cast into an ingot. According to the invention, the adopted raw material comprises a metal material composed of high-speed tool steel scraps and low-carbon carbon steel scraps. According to total weight percentages, the metal material contains no lower than 70% of the high-speed tool steel scraps. With LF furnace refining, molten steel cleanness is substantially improved, such that a guarantee is provided for improving steel quality. With LF furnace refining, molten steel total oxygen content is lower than 20ppm; molten steel sulfur content is lower than 0.002%; and impurities larger than 10 micrometers are almost completely rejected. The high-speed steel recycled material refining method provided by the invention has the advantages of low production cost and high product cleanness.

Description

technical field [0001] The invention relates to a refining method for high-speed steel, in particular to a refining method for recovered and remelted high-speed steel reclaimed materials. The present invention is an improvement to the applicant's Chinese invention patent No. ZL200910260289.X. Background technique [0002] At present, most of the high-speed tool steels used to make saw blades on the market rely on imports, and their prices are very high. In order to reduce the production cost of this kind of high-speed tool steel, at present, some domestic enterprises use recycled high-speed steel scrap as raw material for smelting. However, since the recovered high-speed steel waste is mixed with a large amount of impurities, oil and water, how to remove impurities and gases during the smelting process, improve the cleanliness of the steel, and purify the grain boundaries of the as-cast structure of the steel, thereby improving the quality of the steel The performance of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21C7/072C22C38/24
CPCY02P10/20
Inventor 李宝军
Owner 大连永宝新材料科技有限公司
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