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A kind of high-speed steel roll and preparation method thereof

A technology of high-speed steel and roll, applied in the direction of roll, metal rolling, metal rolling, etc., can solve the problems affecting the performance of high-speed steel, and achieve the effect of cost reduction and less addition

Active Publication Date: 2016-02-17
山东格新精工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After quenching, because the internal structure still retains a part (about 30%) of the retained austenite and has not transformed into martensite, which affects the performance of high-speed steel

Method used

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  • A kind of high-speed steel roll and preparation method thereof
  • A kind of high-speed steel roll and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Melting the high-speed steel roll material of the present invention with 750 kilograms of medium-frequency induction furnaces, the specific preparation process steps are as follows:

[0035] 1) Mix and heat scrap steel, recarburizer, ferrochrome, copper plate, ferrotungsten and ferromolybdenum, add ferrosilicon after molten steel is melted, add silver and nitrogen-containing ferrochrome when the temperature rises to 1548°C, and then add ferrovanadium in sequence , ferroboron and ferrotitanium, after adjusting the ingredients before the furnace to pass, the temperature of the molten steel is raised to 1580°C, and the slag is removed from the furnace.

[0036] 2) Crushing iron bismuth, copper telluride master alloy, potassium carbonate and rare earth magnesium alloy (the rare earth element is lanthanum) into small pieces with a particle size of less than 8mm, dried at 120°C to constant weight, and placed at the bottom of the ladle, Composite modification of molten steel i...

Embodiment 2

[0042] Melting the high-speed steel roll material of the present invention with 500 kilograms of medium-frequency induction furnaces, the specific preparation process steps are as follows:

[0043] 1) Mix and heat scrap steel, recarburizer, ferrochrome, copper plate, ferrotungsten and ferromolybdenum, add ferrosilicon after molten steel is melted, add silver and nitrogen-containing ferrochrome when the temperature rises to 1548°C, and then add ferrovanadium in sequence , ferroboron and ferrotitanium, after adjusting the ingredients before the furnace to pass, the temperature of the molten steel is raised to 1580°C, and the slag is removed from the furnace.

[0044] 2) Crushing iron bismuth, copper telluride master alloy, potassium carbonate and rare earth magnesium alloy (the specific rare earth elements are gadolinium and cerium) into small pieces with a particle size of less than 8mm, dried at 120°C to constant weight, and placed in a ladle At the bottom, the molten steel is...

Embodiment 3

[0050] Melting the high-speed steel roll material of the present invention with 1000 kilograms of medium-frequency induction furnaces, the specific preparation process steps are as follows:

[0051] 1) Mix and heat scrap steel, recarburizer, ferrochrome, copper plate, ferrotungsten and ferromolybdenum, add ferrosilicon after molten steel is melted, when the temperature rises to 1540°C, add silver and nitrogen-containing ferrochrome, and then add ferrovanadium in sequence , ferroboron and ferrotitanium, after adjusting the ingredients before the furnace to pass, the temperature of the molten steel is raised to 1580°C, and the slag is removed from the furnace.

[0052] 2) Crushing iron bismuth, copper telluride master alloy, potassium carbonate and rare earth magnesium alloy (the rare earth element is cerium) into small pieces with a particle size of less than 8mm, dried at 200°C to constant weight, and placed at the bottom of the ladle, Composite modification of molten steel is...

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Abstract

The invention discloses a high-speed steel roll and a preparation method thereof, belonging to the technical field of steel rolling. Particularly, the high-speed steel roll comprises the following chemical compositions in percentage by mass: 2.00-3.20% of tungsten, 2.00-3.00% of chromium, 1.00-1.20% of carbon, 0.60-1.00% of silicon, 0.50-0.80% of molybdenum, 0.20-0.60% of vanadium, 0.20-0.60% of boron, 0.20-0.60% of silver, 0.05-0.10% of nitrogen, 0.20-0.60% of copper, 0.08-0.16% of rare earth, 0.04-0.10% of magnesium, 0.04-0.10% of titanium, 0.10-0.20% of potassium, 0.08-0.16% of sodium, 0.02-0.04% of tellurium, 0.02-0.04% of bismuth, and the balance of iron and inevitable trace impurities of which the content is less than 0.01%. According to the high-speed steel roll material disclosed by the invention, the macro-hardness of the roll surface has a qualitative leap; compared with the prior art, the high-speed steel roll material has the advantage that the tensile strength and impact toughness are greatly increased and improved.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a high-speed steel roll and a preparation method thereof. Background technique [0002] High-speed steel is a tool steel with high hardness, high wear resistance and high heat resistance, also known as high-speed tool steel or front steel, commonly known as white steel. It is an alloy steel with complex composition, containing carbide forming elements such as tungsten, molybdenum, chromium, vanadium and cobalt. The total amount of alloying elements is about 10-25%. It can still maintain high hardness under the condition of high heat generated by high-speed cutting (about 500°C), and its HRC can be above 60. This is the most important characteristic of high-speed steel - red hardness. After quenching and low-temperature tempering, carbon tool steel has high hardness at room temperature, but when the temperature is higher than 200°C, the hardness drops sharply,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/60B21B27/00
Inventor 郑加彬吴庆龙
Owner 山东格新精工有限公司
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