Graphite steel roller used by ribbon steel reversible roughing mill and manufacturing process thereof

A processing technology and rough rolling mill technology, applied in the direction of rolls, metal processing equipment, metal rolling, etc., can solve problems such as inability to meet the needs of use, and achieve the effect of eliminating loose tissue areas, reducing production costs, and improving microstructures

Pending Publication Date: 2019-09-10
常州市中宇合金轧辊厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings in the prior art that cannot meet the needs of use, and propose a graphite steel roll used in a narrow strip steel reversing roughing mill

Method used

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  • Graphite steel roller used by ribbon steel reversible roughing mill and manufacturing process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment one, a kind of processing technology of the graphite steel roll that narrow-strip reversible roughing mill uses, comprises the following steps:

[0029] S1. Determine the chemical composition: the chemical composition of the upper roll and the lower roll is C: 1.85%; Si: 1.00%; Mn: 0.80%; Cr: 1.50%; Ni: 1.50%; Mo: 0.40%; V: 0.20 %; Nb: 0.10%; P: 0.010%; S: 0.010%;

[0030] S2. Smelting: Melt primary molten steel in an intermediate frequency induction furnace, add slagging material at 1450°C for slagging (the slagging material is made of a mixture of quartz sand, block lime and fluorite powder), remove slag at 1520°C, and the temperature reaches Add high melting point alloy at 1580°C, then add 2 kg of yttrium-based heavy rare earth modifier per ton, add 0.03% aluminum by inserting method, tap after 5 minutes of calming in the furnace, and add 0.05% CaSi balls after tapping Add 0.45% CaBa inoculant, and then complete stirring with an electromagnetic stirrer fo...

Embodiment 2

[0034] Embodiment two, a kind of processing technology of the graphite steel roll that narrow-strip reversible roughing mill uses, comprises the following steps:

[0035] S1. Determine the chemical composition: the chemical composition of the upper roll and the lower roll is C: 1.95%; Si: 1.20%; Mn: 0.90%; Cr: 2.00%; Ni: 2.00%; Mo: 0.60%; V: 0.30 %; Nb: 0.20%; P: 0.020%; S: 0.020%;

[0036] S2. Smelting: Melt primary molten steel in an intermediate frequency induction furnace, add slagging material at 1460°C for slagging (the slagging material is made of a mixture of quartz sand, block lime and fluorite powder), remove slag at 1520°C, and the temperature reaches Add high melting point alloy at 1600°C, then add 3 kg of yttrium-based heavy rare earth modifier per ton, add 0.03% aluminum by inserting method, tap after 7 minutes of calming in the furnace, and add 0.60% CaSi balls after tapping Add 0.50% CaBa inoculant, and then complete stirring with an electromagnetic stirrer fo...

Embodiment 3

[0040] Embodiment three, a kind of processing technology of the graphite steel roll that narrow-strip reversible roughing mill uses, comprises the following steps:

[0041] S1. Determine the chemical composition: the chemical composition of the upper roll and the lower roll is C: 2.05%; Si: 1.50%; Mn: 1.00%; Cr: 2.50%; Ni: 2.50%; Mo: 0.80%; V: 0.40 %; Nb: 0.30%; P: 0.030%; S: 0.025%;

[0042] S2. Smelting: Melt the primary molten steel in an intermediate frequency induction furnace, add slagging material at 1480°C for slagging (the slagging material is made of a mixture of quartz sand, block lime and fluorite powder), remove slag at 1520°C, and the temperature reaches Add high melting point alloy at 1620 ℃, then add 4 kg of yttrium-based heavy rare earth modifier per ton, add 0.03% aluminum by inserting method, tap after 8 minutes of calming in the furnace, and add 0.80% CaSi balls after tapping Add 0.60% CaBa inoculant, and then complete stirring with an electromagnetic stir...

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Abstract

The invention relates to the technical field of rollers, in particular to a graphite steel roller used by a ribbon steel reversible roughing mill and a manufacturing process thereof. The defect that the use requirement cannot be met in the prior art is overcome; the graphite steel roller includes an upper roller and a lower roller, the upper roller and the lower roller are symmetrically arranged and each comprise a roller body, bearing guards are fixedly arranged on the both sides of each roller body, the other sides of the bearing guards are fixedly provided with first roller necks and secondroller necks, and the other side of each second roller neck is fixedly provided with a transmission part. According to the graphite steel roller used by the ribbon steel reversible roughing mill, molten steel is spheroidized and inoculated by a spheroidizing agent and an inoculant correspondingly, an electromagnetic vibration centrifugal casting manner is used in cooperation, the microstructure of solidification crystallization of the steel industry can be improved, the structure loose area is eliminated, when the roller is used for rolling weathering resistant steel class strip steel, the rolling amount is 1-2 times that of a traditional roller, and the graphite steel roller very popular with users.

Description

technical field [0001] The invention relates to the technical field of rolls, in particular to a graphite steel roll used in a narrow strip steel reversing roughing mill and a processing technology thereof. Background technique [0002] As the narrow-strip steel varieties rolled by narrow-strip steel rolling mills are developing from ordinary steel to high-quality steel and special steel, especially special steel varieties. Because of the high alloying of steel grades and large changes in particle hardness, the use of conventional alloy ductile iron and semi-steel rolls for reversible roughing stands cannot meet the needs of improving the efficiency and quality of special steel production. Therefore, we propose a graphite steel roll used in a narrow strip steel reversing roughing mill to solve the above problems. Contents of the invention [0003] The object of the present invention is to solve the disadvantages in the prior art that cannot meet the use requirements, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/56B21B27/02B23P15/00C21D9/38C22C33/04C21D6/00
CPCC22C38/56C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C33/04C21D9/38B23P15/00B21B27/02C21D6/004C21D6/005C21D6/008
Inventor 许峰许阿平蒋志芳
Owner 常州市中宇合金轧辊厂
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