Novel graphite semi-steel bar and finished product roller and production method thereof

A graphite semi-steel, production method technology, applied in the direction of rolls, furnace types, metal rolling, etc., can solve the problems of poor roll stability, short service life, high production cost, etc., to improve quality, improve purity, and increase production The effect of efficiency and effectiveness

Pending Publication Date: 2018-06-15
常州市瑞宏轧辊有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the finished rolls of profiles and parts cannot meet the requirements of shape and dimensional accuracy and good comprehensive mechanical properties, resulting in poor roll stability, fast wear, short service life, and high production costs.

Method used

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  • Novel graphite semi-steel bar and finished product roller and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment is a method for producing a new type of graphite semi-steel profile and finished product rolls; including the following steps:

[0033] Step 1: Configure the chemical composition: C: 1.60%, Si: 1.50%, Mn: 0.60%, Cr: 0.80%, Ni: 3.20%, Mo: 0.50%, V: 0.1%, Nb: 0.30%, Co: 0.20 %, Re: 0.06%, P≤0.01%, S≤0.01%, Ba+Ca: 0.45%; the balance is Fe and a small amount of residual elements;

[0034] Step 2: After smelting in an intermediate frequency electric furnace, the molten steel is tapped at 1550~1580℃ and poured into the LF ladle refining furnace for refining. When the liquid phase temperature is higher than 120℃, the steel is tapped and the argon gas is blown to oscillate. A 6-channel wire feeder is used: 2 channel rare earth magnesium + 2 channel BaCa spheroidizing agent + 2 channel CaSi inoculant, extend into the ladle at a speed of 8 meters per second, and incubate while spheroidizing. After the strip is processed, the molten steel is calmed for 5-8 minutes until...

Embodiment 2

[0040] This embodiment is a method for producing a new type of graphite semi-steel profile and finished product rolls; including the following steps:

[0041] Step 1: Configure the chemical composition: C: 1.80%, Si: 1.80%, Mn: 0.90%, Cr: 1.0%, Ni: 3.60%, Mo: 0.80%, V: 0.2%, Nb: 0.20%, Co: 0.10 %, Re: 0.10%, P≤0.015%, S≤0.01%, Ba+Ca: 0.55%; the balance is Fe and a small amount of residual elements;

[0042] Step 2: After smelting in an intermediate frequency electric furnace, the molten steel is tapped to 1550~1580℃ and poured into the LF ladle refining furnace for refining. When the liquid temperature is higher than 140℃, the steel will be tapped and the argon gas will be blown to oscillate. A 6-channel wire feeder is used: 2 channel rare earth magnesium + 2 channel BaCa nodulizer + 2 channel CaSi inoculant, extend into the ladle at a speed of 12 meters per second, incubate while spheroidizing. After the strip is processed, the molten steel is calmed for 5-8 minutes until the stee...

Embodiment 3

[0046] This embodiment is a method for producing a new type of graphite semi-steel profile and finished product rolls; including the following steps:

[0047] Step 1: Configure chemical composition: C: 2.0%, Si: 1.90%, Mn: 1.20%, Cr: 1.2%, Ni: 4.00%, Mo: 1.00%, V: 0.3%, Nb: 0.10%, Co: 0.30 %, Re: 0.15%, P≤0.005%, S≤0.01%, Ba+Ca: 0.65%; the balance is Fe and a small amount of residual elements;

[0048] Step 2: After smelting in an intermediate frequency electric furnace, the molten steel is tapped to 1550~1580℃ and poured into the LF ladle refining furnace for refining. When the liquid temperature is higher than 160℃, the steel is tapped and the argon gas is blown to oscillate. A 6-channel wire feeder is used: 2 channel rare earth magnesium + 2 channel BaCa spheroidizing agent + 2 channel CaSi inoculant, extend into the ladle at a speed of 15 meters per second, and incubate while spheroidizing. After the strip is processed, the molten steel is calmed for 5-8 minutes until the steel...

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Abstract

The invention relates to a novel graphite semi-steel bar and finished product roller assembly, which comprises an upper roller and a lower roller. The upper roller comprises an upper roller body, andan upper roller neck and an upper bearing retainer roll neck located on two ends of the upper roller body; the lower roller comprises a lower roller body, and a lower roller neck and a lower bearing retainer roll neck arranged correspondingly; 2 to 5 'U'-shaped grooves surrounding the upper roller body are arranged on the upper roller body at intervals; 2 to 5 inverted 'U'-shaped bulges surrounding the lower roller body are arranged on the lower roller body at corresponding intervals; a smooth platform is arranged between each two adjacent grooves or bulges; and the upper roller body and the lower roller body are mutually meshed. According to the novel graphite semi-steel bar and finished product roller assembly provided by the invention, through the inverted 'U'-shaped bulges and the 'U'-shaped grooves of the roller bodies, bars and parts with required shapes are rolled, and meanwhile, through adjusting a distance between the two rollers, the thicknesses of the rolled bars and partsare adjusted, so that the production efficiency is improved.

Description

Technical field [0001] The invention relates to a novel finished product roll and a production method, in particular to a novel graphite semi-steel profile and parts finished roll and a production method thereof. Background technique [0002] In the production of steel rolling, the shape and dimensional accuracy of the rolled finished product depend on the shape and dimensional accuracy of the roll. Especially in the rolling of profiles and parts, due to the different forces on each part of the roll, higher requirements are put forward on the shape and dimensional accuracy of the roll, and the roll is required to have high strength and comprehensive mechanical properties. At present, most of the finished rolls of profiles and parts cannot meet the requirements of shape and dimensional accuracy and good comprehensive mechanical properties, resulting in poor roll stability, fast wear, short service life, and high production costs. Summary of the invention [0003] The purpose of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/56C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48C22C38/52C21D9/38C21D1/32C21D1/28C21D1/18C21C7/00B21B27/02
CPCC21C7/0056C21D1/18C21D1/28C21D1/32C21D6/004C21D9/38C22C38/002C22C38/04C22C38/34C22C38/44C22C38/46C22C38/48C22C38/52C22C38/56B21B27/02C21D2211/002C21D2211/004C21D2211/006C21D2211/008
Inventor 蒋卫平蒋志芳将新征王亮钱秋虎
Owner 常州市瑞宏轧辊有限公司
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