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High-wear-resistance graphite steel edging roller of profile steel-rail beam rolling mill and manufacturing method thereof

A technology of rail beam rolling mill and manufacturing method, which is applied in the field of edge rolls, can solve problems such as accident resistance and toughness improvement, effective area reduction, and short machine cycle, so as to ensure accident resistance, avoid cracks, and ensure anti-accident thermal cracking effect

Inactive Publication Date: 2020-05-05
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, after the roll is grooved, the effective area of ​​the roll body bearing the rolling force is reduced, especially for some rolls with deep grooves, in order to ensure the normal use of the roll, the roll must have a certain strength and toughness
[0003] At present, the available materials for edge rolls of section steel-rail beam universal rolling mills include alloy cast steel, semi-steel and high-carbon semi-steel, etc. Alloy cast steel rolls have higher strength and better toughness, but are poor in wear resistance. Short cycle; semi-steel and high-carbon semi-steel have better wear resistance, but accident resistance and toughness need to be further improved

Method used

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  • High-wear-resistance graphite steel edging roller of profile steel-rail beam rolling mill and manufacturing method thereof
  • High-wear-resistance graphite steel edging roller of profile steel-rail beam rolling mill and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Put the selected raw materials into the electric arc furnace and smelt them by oxidation method. The weight percentage of the raw material alloy composition and each alloy composition is C: 1.80%, Si: 1.20%, Mn: 0.50%, Cr: 0.60 %, Ni: 0.20%, Mo: 0.20%, attached P ≤ 0.03%; S ≤ 0.03%, the rest is Fe and unavoidable impurities; the task of the oxidation stage is to remove P and remove gas and non-metallic inclusions in the metal During the reduction period, the oxygen and sulfur in the molten steel are removed, and the chemical composition is adjusted to meet the requirements;

[0047] 2. After the smelting in step 1 is completed, inoculation is carried out before the furnace is released; the inoculants are Fe-Si particles and Si-Ca particles, and the addition ratio is 1 ton of molten steel to add 5Kg of inoculants;

[0048] 3. After the bottom inoculation in step two is completed, tap the steel, and inoculate with the flow in the tapping process; the inoculants are Fe-...

Embodiment 2

[0056] 1. Put the selected raw materials into the electric arc furnace and smelt them by oxidation method. The weight percentage of the raw material alloy composition and each alloy composition is C: 2.50%, Si: 2.20%, Mn: 1.20%, Cr: 1.50 %, Ni: 1.00%, Mo: 1.00%, attached P ≤ 0.03%; S ≤ 0.03%, the rest is Fe and unavoidable impurities; the task of the oxidation stage is to remove P and remove gas and non-metallic inclusions in the metal During the reduction period, the oxygen and sulfur in the molten steel are removed, and the chemical composition is adjusted to meet the requirements;

[0057] 2. After the smelting in step 1 is completed, bottom-coating inoculation is carried out before the furnace is released; the inoculants are Fe-Si particles and Si-Ca particles, and the addition ratio is 1 ton of molten steel to add 10Kg of inoculants;

[0058] 3. After the bottom inoculation in step two is completed, tap the steel, and inoculate with the flow in the tapping process; the in...

Embodiment 3

[0066] 1. Put the selected raw materials into the electric arc furnace and smelt them by oxidation method. The weight percentage of the raw material alloy composition and each alloy composition is C: 2%, Si: 2%, Mn: 1%, Cr: 1 %, Ni: 0.50%, Mo: 0.50%, attached P ≤ 0.03%; S ≤ 0.03%, the rest is Fe and unavoidable impurities; the task of the oxidation stage is to remove P and remove gas and non-metallic inclusions in the metal During the reduction period, the oxygen and sulfur in the molten steel are removed, and the chemical composition is adjusted to meet the requirements;

[0067] 2. After the smelting in step 1 is completed, inoculation is carried out before the furnace is released; the inoculants are Fe-Si particles and Si-Ca particles, and the addition ratio is 1 ton of molten steel to add 8Kg of inoculants;

[0068] 3. After the bottom inoculation in step two is completed, tap the steel, and inoculate with the flow in the tapping process; the inoculants are Fe-Si particles...

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Abstract

The invention relates to a high-wear-resistance graphite steel edging roller of a profile steel-rail beam rolling mill and a manufacturing method thereof, and belongs to the technical field of edgingrollers. The manufacturing method mainly comprises the steps of smelting, pouring and heat treatment, wherein inoculation treatment comprises ladle bottom inoculation before tapping, stream inoculation in the tapping process and stream inoculation in the pouring process, the inoculants are Fe-Si particles and Si-Ca particles, and 5-10 Kg of inoculants are added into 1 ton of molten steel; spheroidizing treatment uses a rare-earth ferrosilicon magnesium spheroidizing agent, and the rare-earth ferrosilicon magnesium spheroidizing agent rushes into the molten steel in the tapping process; and after tapping, the molten steel in the ladle is subjected to argon blowing treatment to ensure that the temperature of the molten steel reaches the pouring temperature which is higher than the melting point temperature of the molten steel by more than 50 DEG C, and then pouring is carried out. The high-wear-resistance graphite steel edging roller has high wear resistance, excellent hot crack resistance and accident impact resistance, and can improve the steel adhesion resistance of the edging roller and improve the on-machine period and the rolling efficiency.

Description

technical field [0001] The invention relates to a highly wear-resistant graphite steel edging roll for a section steel-rail rolling mill and a manufacturing method thereof, belonging to the technical field of edging rolls. Background technique [0002] When the edging stand of the profiled steel-rail beam universal rolling mill is in operation, the flange ends of the profiled steel are in contact with the grooves at both ends of the roll body of the edging roll, and the main working surface of the roll is the grooves at both ends of the roll body. It is sawing wear, and the rolls of the edging stand must have good wear resistance and accident resistance, that is, the edging rolls are required to have high wear resistance, and at the same time, the hardness drop should be small. In addition, after the roll is grooved, the effective area of ​​the roll body to withstand the rolling force is reduced, especially for some rolls with deep grooves. In order to ensure the normal use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/34C22C38/44C22C38/56C22C33/04C21D1/32C21D1/28C21D9/38C21C5/52
CPCC21C5/52C21D1/28C21D1/32C21D9/38C22C33/04C22C38/002C22C38/02C22C38/04C22C38/34C22C38/44C22C38/56Y02P10/20
Inventor 刘娣杜江伟杜旭景胡兵
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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