High ferrochrome roller

A high-chromium ferro-rolling technology, applied in the direction of rolls, metal rolling, metal rolling, etc., can solve the problems of high-chromium-iron-rolling rolls that have not been reported, poor wear resistance of high-nickel-chromium materials, poor roll shape retention, etc. Achieve the effects of improving surface quality and service life, high matrix strength, and increasing millimetric rolling capacity

Active Publication Date: 2018-05-11
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Application Information

AI Technical Summary

Problems solved by technology

The four-high reversing rolling mill is the most widely used wide and thick plate rolling mill at home and abroad. It is mainly a single-stand or double-stand four-high reversing rolling mill. The rolling mills generally use high-nickel-chromium infinite chilled centrifugal composite rolls, but high Nickel-chromium material has poor wear resistance and poor roll shape retention ability, which affects the shape control
[0005] In recent years, great progress has been made in the research of high-chromium cast iron or high-chromium cast steel new materials at home and abroad, but there is no report on high-chromium iron rolls applied to 5000mm wide and thick plate rolling mills

Method used

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Embodiment 1

[0041] In this embodiment, the composition design target of the working layer of the roll body is 2.40-2.60% of C, 0.60-0.70% of Si, 1.10-1.20% of Mn, 15.00-16.00% of Cr, 1.50-1.70% of Ni, 1.20-1.40% of Mo, V 0.30~0.50%, S≤0.05%, P≤0.05%, the rest is Fe and unavoidable impurities. The manufacturing method is as follows:

[0042] A. Smelting: Dosing ingredients according to the chemical composition of the working layer of the roll body, and then smelting in an induction furnace with a smelting temperature of 1450°C;

[0043]The core of the roll is made of pig iron, which is smelted in a blast furnace at a temperature of 1450°C. Before the furnace is released, an inoculant and a nodularizer are added to the molten iron. The inoculant is ferrosilicon and silicon-barium alloy. 0.4%, the nodulizer is a rare earth magnesium alloy, and the weight of the nodulizer accounts for 1.1% of the weight of the molten iron;

[0044] B. Centrifugal casting: Centrifugal pouring of the working ...

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Abstract

The invention discloses a high ferrochrome roller used for a large-sized wide and thick plate rolling mill. The high ferrochrome roller comprises a roller core, a roller neck and a roller body workinglayer. The roller body working layer comprises, by mass, 2.40%-3.30% of C, 0.60%-1.00% of Si, 0.90%-1.20% of Mn, 15.00%-18.00% of Cr, 1.10%-1.70% of Ni, 0.80%-1.40% of Mo, 0.10%-0.60% of V, 0-0.10% of S, 0-0.05% of P, and the balance Fe and inevitable impurities. By adjusting the heat treatment technology, the mechanical property of the roller is improved, the abrasion resistance and millimeter rolling quantity of the roller are increased, and the service life of the roller is prolonged.

Description

technical field [0001] The invention relates to a roll, especially a high-chromium iron roll, which is used in a 5000mm wide and thick plate rolling mill. Background technique [0002] Since the 1980s, my country has successively built more than ten large wide and thick plate rolling lines over 4000mm. Although large wide and thick plate started slowly, with the rapid development of China's steel industry, large bridges, nuclear power plants, To meet the needs of dams, large ships and other fields, wide and thick plates have been more widely used, which has also promoted the rapid development of wide and heavy plate production. China has developed into the world's largest producer and consumer of wide and heavy plates. [0003] The rolling pressure of large wide and thick plate rolling mills is high, up to 8000-12000t. At the same time, the reciprocating rolling method makes the rolls need to withstand high alternating stress and large mechanical impact. The four-high revers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/08B22D13/02B22D19/16C21D1/26C21D9/38B21B27/00
CPCB21B27/00B22D13/02B22D19/16C21D1/26C21D9/38C22C37/08C22C37/10
Inventor 杜旭景
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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