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Nodular cast iron edging roll suitable for universal rolling mill and manufacturing method thereof

A ductile iron, universal rolling mill technology, applied in the field of rolls and manufacturing, ductile iron edge rolls and their manufacturing fields, can solve the problems of high production cost and long production cycle, etc.

Active Publication Date: 2017-02-01
邢台轧辊线棒辊有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a nodular cast iron edging roll suitable for universal rolling mills and its manufacturing method, which uses ductile iron to replace the material of traditional universal rolling mill rolls, and adopts a specific manufacturing process to solve the existing roll production cycle. Long, high production cost, at the same time, the wear resistance of the roll is improved

Method used

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  • Nodular cast iron edging roll suitable for universal rolling mill and manufacturing method thereof
  • Nodular cast iron edging roll suitable for universal rolling mill and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A nodular cast iron roll suitable for a universal rolling mill and a manufacturing method thereof, comprising a roll body, an upper roll neck and a lower roll neck, characterized in that: the chemical composition of the roll body and the lower roll neck is consistent, wherein the chemical composition of the roll body Points and weight percentages are:

[0050] C 3.15~3.3%, Si 0.8~1.2%, Mn 0.5~0.6%, Cr 0.5~0.6%, Ni 1.6~2.0%, Mo 0.2~0.45%, Re 0.05~0.08%, Mg≥0.04%, P≤0.04 , S≤0.04, the rest are Fe and unavoidable impurities;

[0051] In step b), the smelting temperature of the molten iron on the roll body is 1450°C, the addition of the inoculant is 0.45%, the addition of the nodulizer is 0.7% of the total amount of the molten iron, and the addition of the modifier is 0.25% of the total amount of the molten iron;

[0052] The smelting temperature of the molten iron on the upper roll neck is 1460°C, the addition amount of the inoculant is 0.45%, and the addition amount of t...

Embodiment 2

[0057] The present embodiment is the same as the process step in embodiment 1, and the difference with embodiment 1 is: in the present embodiment, the chemical composition and weight percentage of the roll body used for the ductile iron roll of the universal rolling mill are:

[0058] C 3.3~3.45%, Si 1.0~1.6%, Mn 0.5~0.65%, Cr 0.7~0.8%, Ni 1.8~2.2%, Mo 0.45~0.55%, Re 0.05~0.08%, Mg≥0.04%, P≤0.04 , S≤0.04, the rest are Fe and unavoidable impurities;

[0059] In step b), the smelting temperature of the molten iron on the roll body is 1500°C, the addition of the inoculant is 0.6%, the addition of the nodulizer is 0.8% of the total amount of the molten iron, and the addition of the modifier is 0.3% of the total amount of the molten iron;

[0060] The smelting temperature of the molten iron on the upper roll neck is 1490°C, the addition amount of the inoculant is 0.7%, and the addition amount of the nodulizer is 1.45% of the total amount of the molten iron.

[0061] According to t...

Embodiment 3

[0065] The present embodiment is the same as the process step in embodiment 1, and the difference with embodiment 1 is: the roll body chemical composition and the weight percentage composition of the nodular cast iron roll that is used for universal rolling mill in the present embodiment are:

[0066] C 3.45~3.6%, Si 1.6~2.0%, Mn 0.6~0.7%, Cr 0.8~1.0%, Ni 2.4~3.0%, Mo 0.6~0.7%, Re 0.08~0.1%, Mg≥0.04%, P≤0.04 , S≤0.04, the rest are Fe and unavoidable impurities;

[0067] In step b), the smelting temperature of the molten iron on the roll body is 1540°C, the addition of the inoculant is 0.9%, the addition of the nodulizer is 1.0% of the total amount of the molten iron, and the addition of the modifier is 0.4% of the total amount of the molten iron;

[0068] The smelting temperature of the molten iron on the upper roll neck is 1550°C, the addition amount of the inoculant is 0.8%, and the addition amount of the nodulizer is 1.6% of the total amount of the molten iron.

[0069] Ac...

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Abstract

The invention discloses a nodular cast iron edging roll suitable for a universal rolling mill and a manufacturing method thereof. The nodular cast iron edging roll suitable for the universal rolling mill comprises a roll body, an upper roll neck and a lower roll neck, wherein the chemical components of the roll body and the lower roll neck are consistent, and the roll body includes, by weight percentage, 2.8-3.6% of C, 0.6-2.0% of Si, 0.3-0.6% of Mn, 0.3-1.0% of Cr, 1.0-3.0% of Ni, 0.2-0.7% of Mo, 0.05-0.1% of Re, 0.04% or more of Mg, 0.04% or less of P, 0.04% or less of S and the balance Fe. The manufacturing method includes the steps of molding, smelting, casting, box opening and heat treatment. Nodular cast iron replaces traditional universal rolling mill edging roll materials, a specific manufacturing process is adopted, the problems that an existing roll is long in production period and high in production cost are solved, and the abrasion resistance of the roll is improved.

Description

technical field [0001] The invention relates to a roll and a manufacturing method, in particular to a nodular cast iron edging roll suitable for a universal rolling mill and a manufacturing method thereof, belonging to the technical field of mechanical processing and heat treatment. Background technique [0002] With the progress of science and technology, especially the continuous breakthrough of steel rolling technology, including the relentless pursuit of higher rolling efficiency, higher rolled product quality and the lowest rolling cost, the roll manufacturing technology is also undergoing rapid development . [0003] The universal rolling mill came into being and is mainly used to roll various types of steel. It is named "universal rolling mill" because it is suitable for rolling various types of steel, such as: H-beam, rail, I-beam, U-beam, etc. Generally, the main frame is composed of a pair of horizontal rollers and a pair of vertical rollers. The axes of the four ...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/08B22D19/16C22C33/10C21D9/38
CPCB22D19/16C21D9/38C22C33/10C22C37/08C22C37/10
Inventor 董亮马大江郭小军李晓刚贺振轩
Owner 邢台轧辊线棒辊有限责任公司
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