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Abrasion-resistance high-speed steel composite roller and preparation method thereof

A composite roll and high-speed steel technology, applied in the field of rolls, can solve problems such as easy cracking of rolls, poor uniformity of roll surface hardness, and decreased hardness of the working layer of the roll body, so as to improve strength and toughness, excellent wear resistance, promote refinement and The effect of homogenizing the distribution

Active Publication Date: 2016-06-01
安徽环渤湾高速钢轧辊有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned high-speed steel roll still has the disadvantages of poor uniformity of roll surface hardness, obvious decrease in hardness of the working layer of the roll body, and easy cracking of the roll during use.

Method used

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  • Abrasion-resistance high-speed steel composite roller and preparation method thereof
  • Abrasion-resistance high-speed steel composite roller and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A wear-resistant high-speed steel composite roll and a preparation method thereof. The roll body 1 high-speed steel and the roll core 2 ductile iron are integrated by centrifugal composite casting. The specific preparation process steps are:

[0026] ① Melt the high-speed steel composite roll in a 750 kg intermediate frequency induction furnace. %V, 3.44%W, 1.19%Nb, 0.55%Ni, 0.47%Si, 0.75%Mn, 0.028%S, 0.031%P, balance Fe;

[0027] ②When the temperature of the molten steel in roll body 1 in step ① reaches 1621°C, the molten steel is taken out of the furnace and placed in a ladle, and the bottom of the ladle is pre-added with a multi-element aluminum-iron alloy deoxidizer. The chemical composition mass fraction of the multi-element aluminum-iron alloy deoxidizer is: 40.50% Al, 0.21% C , 2.99% Si, 2.52% Mn, 4.07% Ca, 2.94% Ba, 0.008% S, 0.016% P, the balance Fe, the amount of multi-element aluminum-iron alloy deoxidizer accounted for 0.35% of the mass fraction of molten st...

Embodiment 2

[0031] A wear-resistant high-speed steel composite roll and a preparation method thereof. The roll body 1 high-speed steel and the roll core 2 ductile iron are integrated by centrifugal composite casting. The specific preparation process steps are:

[0032] ① Melt the high-speed steel composite roll body 1 in a 500-kg medium-frequency induction furnace, which refers to the working part of the roll. The chemical composition and mass fraction of the molten steel of the roll body 1 are controlled at 2.36%C, 3.51%Cr, 5.85%Mo, 5.96% %V, 1.57%W, 0.67%Nb, 1.19%Ni, 0.78%Si, 0.31%Mn, 0.024%S, 0.028%P, balance Fe;

[0033] ②When the temperature of the molten steel on roll body 1 in step ① reaches 1647°C, the molten steel is taken out of the furnace and placed in a ladle, and the bottom of the ladle is pre-added with a multi-element aluminum-iron alloy deoxidizer. The chemical composition mass fraction of the multi-element aluminum-iron alloy deoxidizer is: 43.89% Al, 0.20% C , 2.07% Si,...

Embodiment 3

[0037] A wear-resistant high-speed steel composite roll and a preparation method thereof. The roll body 1 high-speed steel and the roll core 2 ductile iron are integrated by centrifugal composite casting. The specific preparation process steps are:

[0038] ① First melt the high-speed steel composite roll in a 1000 kg medium-frequency induction furnace. %V, 2.60%W, 0.84%Nb, 0.79%Ni, 0.66%Si, 0.42%Mn, 0.014%S, 0.026%P, balance Fe;

[0039] ②When the temperature of the molten steel on roll body 1 in step ① reaches 1639°C, the molten steel is taken out of the furnace and placed in a ladle. The bottom of the ladle is pre-added with a multi-element aluminum-iron alloy deoxidizer. The chemical composition mass fraction of the multi-element aluminum-iron alloy deoxidizer is: 42.37% Al, 0.31% C , 2.58% Si, 2.91% Mn, 4.35% Ca, 2.88% Ba, 0.011% S, 0.018% P, the balance Fe, the amount of multi-element aluminum-iron alloy deoxidizer accounted for 0.45% of the mass fraction of molten steel...

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Abstract

The invention discloses an abrasion-resistance high-speed steel composite roller and a preparation method thereof, and belongs to the technical field of rollers. The composite roller forms a whole through roller body high-speed steel and roller core nodular cast iron by means of centrifuge composite casting. The roller body molten steel is controlled to comprise, by mass, 1.5%-2.4% of C, 3.5%-6.0% of Cr, 3.5%-6.0% of Mo, 3.5%-6.0% of V, 1.5%-3.5% of W, 0.6%-1.2% of Nb, 0.5%-1.2% of Ni, 0.3%-0.8% of Si, 0.3%-0.8% of Mn, 0-0.04% of S, 0-0.04% of P and the balance Fe. The roller body molten steel is deoxidized, external-furnace modification treatment is conducted on the molten steel through multi-element micro-alloy wires, and then pouring is conducted on a centrifugal machine to form the roller; the roller core is made of nodular cast iron, tempering is conducted on the roller after quenching, and therefore the characteristics of being high in hardness, high in toughness, good in abrasive resistance and the like are realized, and an excellent using effect is achieved.

Description

technical field [0001] The invention discloses a wear-resistant composite roll and a preparation method thereof, in particular to a wear-resistant high-speed steel composite roll and a preparation method thereof, belonging to the technical field of rolls. Background technique [0002] The roll is an important consumable spare part in steel rolling production. The quality of the roll not only affects the surface quality and dimensional accuracy of the rolled material, but also affects the production efficiency of the rolling mill. Therefore, improving the wear resistance of the roll is a major issue that roll developers around the world have been paying close attention to for a long time. Since then, high chromium cast iron rolls, chilled cast iron rolls and semi-steel rolls have been widely used at home and abroad. Chinese invention patent CN102371273 discloses a high-chromium cast iron roll and its production method, which is characterized in that alloy components W and V a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16B22D13/02C22C38/18C22C38/12C22C38/08C22C38/02C22C38/04C21C7/06C21C7/00C22C37/10
CPCB22D13/02B22D19/16C21C7/0006C21C7/06C22C37/04C22C37/10C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18
Inventor 张政龙
Owner 安徽环渤湾高速钢轧辊有限公司
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