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Wear-resistant roll and manufacture method thereof

A roll and preparation process technology, applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of uneven distribution of eutectic carbides, poor fatigue performance of carbides, and reduced service life of rolls. Good abrasion resistance and improved fatigue performance

Active Publication Date: 2017-08-11
JIANGSU GANGBAO ROLLER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] As soon as the above-mentioned nickel-chromium infinitely chilled cast iron rolls have higher hardness and better wear resistance, there are still defects such as uneven distribution of eutectic carbides, network-like distribution of carbides, poor fatigue performance, and low fracture toughness. , leading to the fatigue spalling of the roll during use, which reduces the service life of the roll

Method used

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  • Wear-resistant roll and manufacture method thereof

Examples

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Effect test

Embodiment 1

[0025] A wear-resistant roll and a preparation method thereof, characterized in that it is smelted in a 3-ton power-frequency induction furnace, and the specific preparation process steps are:

[0026] ① Use scrap steel, pig iron, ferrochrome, nickel plate, ferrotungsten, ferro-niobium, ferrosilicon, ferromanganese and metal aluminum as ingredients, firstly mix ferro-tungsten, ferro-niobium, scrap steel, pig iron and nickel plate in the furnace and heat and melt them. After all the materials are melted, add ferrochrome. After the ferrochrome is melted, raise the temperature of the molten iron to 1532°C, then add ferrosilicon, ferromanganese and metal aluminum in sequence, and remove slag from the molten iron at 1563°C and test its composition. Its mass fraction is 3.28%C, 2.44%Cr, 0.064%Nb, 3.95%Ni, 2.19%W, 0.88%Al, 0.72%Si, 0.51%Mn, 0.031%S, 0.034%P, the balance Fe and unavoidable When there are impurities, the molten iron is taken out of the furnace to the ladle, and the cop...

Embodiment 2

[0029] A wear-resistant roll and a preparation method thereof, characterized in that it is smelted in a 1.5-ton medium-frequency induction furnace, and the specific preparation process steps are:

[0030] ① Use scrap steel, pig iron, ferrochrome, nickel plate, ferrotungsten, ferro-niobium, ferrosilicon, ferromanganese and metal aluminum as ingredients, firstly mix ferro-tungsten, ferro-niobium, scrap steel, pig iron and nickel plate in the furnace and heat and melt them. After all the materials are melted, add ferrochrome. After the ferrochrome is melted, heat the molten iron to 1555°C, then add ferrosilicon, ferromanganese and metallic aluminum in sequence, and remove the slag at 1587°C and test the composition. Its mass fraction is 3.63%C, 2.15%Cr, 0.095%Nb, 4.38%Ni, 2.56%W, 0.69%Al, 0.99%Si, 0.25%Mn, 0.028%S, 0.037%P, the balance Fe and unavoidable When there are impurities, the molten iron is taken out of the furnace to the ladle, and the copper-magnesium alloy (the chemic...

Embodiment 3

[0033] A wear-resistant roll and a preparation method thereof, characterized in that it is smelted in a 1000 kg medium-frequency induction furnace, and the specific preparation process steps are:

[0034] ① Use scrap steel, pig iron, ferrochrome, nickel plate, ferrotungsten, ferro-niobium, ferrosilicon, ferromanganese and metal aluminum as ingredients, firstly mix ferro-tungsten, ferro-niobium, scrap steel, pig iron and nickel plate in the furnace and heat and melt them. After all the materials are melted, add ferrochrome. After the ferrochrome is melted, heat the molten iron to 1547°C, then add ferrosilicon, ferromanganese and metal aluminum in sequence, and remove the slag at 1574°C and test the composition. Its mass fraction is 3.47%C, 2.36%Cr, 0.088%Nb, 4.20%Ni, 2.32%W, 0.75%Al, 0.79%Si, 0.46%Mn, 0.033%S, 0.029%P, the balance Fe and unavoidable When there are impurities, the molten iron is taken out of the furnace to the ladle, and the copper-magnesium alloy (the chemical ...

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Abstract

The invention discloses a wear-resistant roll and a manufacture method thereof, belonging to the field of wear-resistant material manufacture. An induction electric furnace is adopted for smelting; waste steel, pig iron, ferrochromium, a nickel plate, ferrotungsten, ferroniobium, ferrosilicon, ferromanganese and aluminum are adopted for material preparation; firstly, the ferrotungsten, the ferroniobium, the waste steel, the pig iron and the nickel plate are mixed, heated and melted in the furnace; after the above materials are completely melted, the ferrochromium, the ferrosilicon, the ferromanganese and aluminum are added; then molten iron is subjected to compound modification in a ladle, and is poured into a mould at 1437-1470 DEG C to obtain the roll product; after stress relief treatment of heat preservation for 10-15 hours at 375-425 DEG C, the roll has the characteristics of high hardness and good abrasion-resistance; and the wear-resistant roll is suitable for promotion and application and has good use effect.

Description

technical field [0001] The invention discloses a wear-resistant roll and a preparation method thereof, in particular to a roll containing nickel, chromium, aluminum, tungsten and other alloy elements and a preparation method thereof, belonging to the field of wear-resistant material manufacturing. Background technique [0002] The working process of the high-nickel-chromium-molybdenum cast iron roll is very complicated. There is strong friction between the roll, the rolled material and the back-up roll during work. Not only does it have abrasive wear, but it also bears high rolling stress. The instantaneous working temperature can reach 600-800 ℃. In addition, under the strong chilling effect of cooling water, the rolls have to withstand high thermal fatigue, so the high-nickel-chromium-molybdenum cast iron rolls should have good wear resistance, thermal fatigue resistance, and contact fatigue performance. In order to improve roll performance, Chinese invention patent CN 10...

Claims

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Application Information

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IPC IPC(8): C22C33/08C22C37/10C22C37/08C21D9/38
CPCC21D9/38C22C33/08C22C37/08C22C37/10
Inventor 符寒光张亚光林健周向阳成小乐雷永平屈银虎
Owner JIANGSU GANGBAO ROLLER
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