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H-shaped steel roll collar and manufacturing method thereof

An H-beam and roll ring technology, applied in the field of steel rolling manufacturing, can solve the problems of adverse effects on the surface quality of rolling steel, slag inclusion in the surface working layer, etc., and achieve the effects of increasing wear resistance, eliminating slag inclusion, and preventing roll ring cracking

Active Publication Date: 2021-01-05
成都三强轧辊股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for large-diameter H-shaped roll rings (such as Φ1600), the existing manufacturing process will cause slag inclusions in the surface working layer, which will adversely affect the surface quality of rolled steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. An H-shaped steel roll ring, comprising an outer layer of 7160kg and a core of 2140kg; wherein, the composition and mass fraction of the outer layer are: C: 1.83%, Si: 0.5%, Mn: 0.6%, P: 0.032%, S : 0.01%, Cr: 1.3%, Ni: 1.2%, the rest is Fe and unavoidable impurities; the composition and mass fraction of the core are: C: 1.15%, Si: 2.2%, Mn: 0.5%, P: 0.032 %, S: 0.012%, Cr: 0.1%, Ni: 0.3%, and the rest are Fe and unavoidable impurities.

[0036] 2. A manufacturing method of an H-shaped steel roll ring, comprising the following steps:

[0037] S1. Separately smelt the outer layer and the core:

[0038] 1) Smelting the outer layer: using pig iron with a mass ratio of 17:50:33, recycled material and steel scrap as raw materials, smelting in a furnace, and adjusting the amount of additives according to the composition of the outer layer, and finally undergoing spheroidization and Inoculation treatment to obtain the outer layer of molten iron;

[0039] 2) Smelting core...

Embodiment 2

[0047]1. An H-shaped steel roll ring, comprising an outer layer of 7160kg and a core of 2140kg; wherein, the composition and mass fraction of the outer layer are: C: 1.8%, Si: 0.51%, Mn: 0.5%, P: 0.03%, S : 0.012%, Cr: 1.2%, Ni: 1.0%, the rest is Fe and unavoidable impurities; the composition and mass fraction of the core are: C: 1.2%, Si: 2.3%, Mn: 0.6%, P: 0.03 %, S: 0.01%, Cr: 0.1%, Ni: 0.3%, and the rest are Fe and unavoidable impurities.

[0048] 2. A manufacturing method of an H-shaped steel roll ring, comprising the following steps:

[0049] S1. Smelting the outer layer and the core respectively:

[0050] 1) Smelting the outer layer: using pig iron with a mass ratio of 17:50:33, recycled material and scrap steel as raw materials, smelting in a furnace, and adjusting the amount of additives according to the composition of the outer layer, and finally undergoing spheroidization and Inoculation treatment to obtain the outer layer of molten iron;

[0051] 2) Smelting cor...

Embodiment 3

[0059] 1. An H-shaped steel roll ring, comprising an outer layer of 7160kg and a core of 2140kg; wherein, the composition and mass fraction of the outer layer are: C: 1.85%, Si: 0.6%, Mn: 1.0%, P: 0.035%, S : 0.03%, Cr: 1.9%, Ni: 1.7%, the rest is Fe and unavoidable impurities; the composition and mass fraction of the core are: C: 1.25%, Si: 2.4%, Mn: 0.6%, P: 0.035 %, S: 0.03%, Cr: 0.2%, Ni: 0.4%, and the rest are Fe and unavoidable impurities.

[0060] 2. A manufacturing method of an H-shaped steel roll ring, comprising the following steps:

[0061] S1. Smelting the outer layer and the core respectively:

[0062] 1) Smelting the outer layer: using pig iron with a mass ratio of 17:50:33, recycled material and scrap steel as raw materials, smelting in a furnace, and adjusting the amount of additives according to the composition of the outer layer, and finally undergoing spheroidization and Inoculation treatment to obtain the outer layer of molten iron;

[0063] 2) Smelting ...

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Abstract

The invention relates to the technical field of rolled steel manufacturing, and discloses an H-shaped steel roll collar which comprises an outer layer and a core part. The outer layer comprises, by mass, 1.8-1.85% of C, 0.5-0.6% of Si, 0.5-1.0% of Mn, less than or equal to 0.035% of P, less than or equal to 0.03% of S, 1.2-1.9% of Cr, 1.0-1.7% of Ni and the balance Fe and inevitable impurities. The core part comprises, by mass, 1.15-1.25% of C, 2.2-2.4% of Si, 0.5-0.6% of Mn, less than or equal to 0.035% of P, less than or equal to 0.03% of S, less than or equal to 0.2% of Cr, 0.3-0.4% of Ni and the balance Fe and inevitable impurities. The invention further discloses a preparation method of the H-shaped steel roll collar. The preparation method comprises the steps of smelting, pouring andaftertreatment. According to the H-shaped steel roll collar and the manufacturing method thereof, outer layer molten iron is poured in a segmented mode, and the parameters such as the pouring temperature, the pouring speed and the interval time between every two times of pouring are controlled, so that the effect of removing slag inclusion in the surface working layer is achieved.

Description

technical field [0001] The invention relates to the technical field of rolling steel manufacturing, in particular to an H-shaped steel roll ring and a manufacturing method thereof. Background technique [0002] The roll ring is the main component of the H-beam universal rolling mill, and it is divided into two types: the horizontal roll ring and the vertical roll ring. At present, with the development of national high-speed rail and the deepening of enterprise transformation, the demand for channel steel, I-beam, angle steel, U-shaped steel, and bridge rails is increasing, and the demand for the number of roll rings for manufacturing steel is also gradually increasing. Normally, the working layer on the surface of the roll ring should have good wear resistance and red hardness, while the core should have high strength and good toughness. In order to achieve the above purpose, centrifugal composite technology is widely used in industry to produce composite roller rings compo...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/56B22D19/16
CPCC22C38/02C22C38/04C22C38/56B22D19/16
Inventor 付家双杨德明程东
Owner 成都三强轧辊股份有限公司
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