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Alloy nodular cast iron roll

A cast iron roll, alloy ball technology, applied in the direction of roll, metal rolling, metal rolling, etc., can solve the problems of high-strength and low-alloy structural steel, serious spalling and crack tendency, low degree of alloying, etc., to improve bending resistance. Strength, carbide morphology improvement, and effect of increasing single-groove rolling

Inactive Publication Date: 2013-09-25
WUXI CAIYUN MACHINERY & EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing roll materials mostly use high-strength low-alloy structural steel. The degree of alloying of this type of material is low. After the final heat treatment, the depth of the hardened layer can only meet the general requirements, and the tendency of spalling and cracking is serious during use. Low rolling life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] An alloy ductile iron roll, including the following components by mass percentage: C: 3.6%, Si: 1.7%, Mn: 0.6%, P: 0.025%, S: 0.02%, Cr: 0.2%, Ni: 1.7% , Mo: 0.5%, Mg: 0.05%, Nb: 0.08%, Ti: 0.12, V: 0.3, and the rest is Fe.

Embodiment 2

[0018] An alloy ductile iron roll, including the following components by mass percentage: C: 3.8%, Si: 2.0%, Mn: 0.7%, P: 0.025%, S: 0.02%, Cr: 0.2%, Ni: 1.7% , Mo: 0.5%, Mg: 0.05%, Nb: 0.08%, Ti: 0.12, V: 0.3, and the rest is Fe.

[0019] Compared with conventional nodular cast iron rolls, the alloy nodular cast iron rolls of the invention have significantly improved bending strength, impact toughness, deflection, reduction of area, elongation after fracture, yield strength and the like. Adopting the alloy ductile iron roll of the present invention can increase the single-slot rolling capacity of the bar finish rolling by about 40%, greatly reduces the downtime for changing rolls and slots, significantly improves the operating rate of the rolling mill, and at the same time reduces the quality of the roll. Optimized and improved the surface quality of the rolled material, and solved the problem of peeling of the inner surface layer of the finish rolling work roll, and the cost...

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PUM

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Abstract

The invention discloses an alloy nodular cast iron roll which comprises the following components in percentage by mass: 3.6-3.8 percent of C, 1.7-2.0 percent of Si, 0.6-0.7 percent of Mn, less than 0.025 percent of P, less than 0.02 percent of S, 0.1-0.3 percent of Cr, 1.5-2.0 percent of Ni, 0.4-0.6 percent of Mo, 0.04-0.06 percent of Mg and the balance of Fe and inevitable impurities. Due to the mode, according to the alloy nodular cast iron roll, the bending strength, impact toughness, deflection, percentage reduction of area, percentage elongation after fracture and yield of the roll can be improved.

Description

technical field [0001] The invention relates to the technical field of rolls, in particular to an alloy ductile iron roll. Background technique [0002] Iron and steel materials play an important role in social and economic life, and rolling steel into products requires a large amount of rolls. Therefore, the quality of the roll directly affects the quality and production cost of the steel. As the steel rolling process becomes increasingly automated, continuous and heavy-duty, the use conditions of the rolls are also becoming increasingly harsh. Equipping rolling mills with high-performance rolls has become an important research topic in the roll industry, and the optimization of roll materials is undoubtedly the basis for manufacturing high-performance rolls. [0003] Most of the existing roll materials are made of high-strength low-alloy structural steel. The degree of alloying of this type of material is low. After the final heat treatment, the depth of the hardened lay...

Claims

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Application Information

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IPC IPC(8): C22C37/10B21B27/00
Inventor 张晓明
Owner WUXI CAIYUN MACHINERY & EQUIP
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