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Working roll of temper mill and manufacturing method thereof

A manufacturing method and technology of work rolls, applied in the manufacture of tools, rolls, metal rolling, etc., can solve the problems of low production line efficiency, short machine time, etc., and achieve the effect of reducing manufacturing difficulty and high wear resistance

Pending Publication Date: 2022-04-19
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the work rolls in the tempering machine are still mainly made of forged steel, the machine time is short, and the production line efficiency is low. The appearance of orange peel in the material rolling process limits the increase in production capacity

Method used

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  • Working roll of temper mill and manufacturing method thereof
  • Working roll of temper mill and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The roll sleeve of the work roll is made of steel scrap, ferronickel, ferrovanadium, ferrochromium, ferromolybdenum, and electrode powder, and is smelted in an intermediate frequency furnace to reach the design composition range: outer layer molten iron C2.33%, Si0.85%, Mn0 .9%, P0.05%, S0.06%, Cr20.56%, Ni0.98%, Mo0.85%, V1.01%, W0.5%, the balance is Fe; core molten iron C3.05% , Si1.36%, Mn0.95%, P0.06%, S0.07%, Cr0.03%, Ni0.12%, Mo0.3%, and the balance is Fe. The outer layer is smelted at a temperature of 1510°C. After the composition reaches the standard, the temperature is raised to 1530°C and then centrifugally poured. The molten steel melting temperature of the core is 1490°C, and the pouring temperature is 1510°C. The pouring water volume of the outer layer is 2.1t, and the pouring water volume of the core is 4.5t. 39 hours after pouring, open the box coldly, add 25mm in the axial direction and 12mm in the radial direction, heat at 980°C for 230min, cool in air ...

Embodiment 2

[0036] The roll sleeve of the work roll is made of steel scrap, ferronickel, ferrovanadium, ferrochromium, ferromolybdenum, and electrode powder, and is smelted in an intermediate frequency furnace to reach the design composition range: outer layer molten iron C2.33%, Si0.85%, Mn0 .9%, P0.05%, S0.06%, Cr20.56%, Ni0.98%, Mo0.85%, V1.01%, W0.5%, the balance is Fe; core molten iron C3.05% , Si1.36%, Mn0.95%, P0.06%, S0.07%, Cr0.03%, Ni0.12%, Mo0.3%, and the balance is Fe. The outer layer is smelted at a temperature of 1510°C. After the composition reaches the standard, the temperature is raised to 1530°C and then centrifugally poured. The molten steel melting temperature of the core is 1490°C, and the pouring temperature is 1510°C. The pouring water volume of the outer layer is 2.1t, and the pouring water volume of the core is 4.5t. 39 hours after pouring, open the box coldly, add 25mm in the axial direction and 12mm in the radial direction, heat at 980°C for 230min, cool in air ...

Embodiment 3

[0038]The roll sleeve of the work roll is made of steel scrap, ferronickel, ferrovanadium, ferrochromium, ferromolybdenum, and electrode powder, and is smelted in an intermediate frequency furnace to reach the design composition range: outer layer molten iron C2.81%, Si0.89%, Mn0 .92%, P0.06%, S0.07%, Cr22.36%, Ni1.32%, Mo0.99%, V1.03%, W0.45%, the balance is Fe; core molten iron C3.12% , Si1.31%, Mn0.91%, P0.05%, S0.06%, Cr0.01%, Ni0.11%, Mo0.2%, and the balance is Fe. The outer layer is smelted at a temperature of 1520°C. After the composition reaches the standard, the temperature is raised to 1535°C and then centrifugally poured out of the furnace. The molten steel melting temperature of the core is 1485°C, and the pouring temperature is 1505°C. The pouring water volume of the outer layer is 1.9t, and the pouring water volume of the core is 4.3t. 35 hours after pouring, open the box coldly, add 23mm in the axial direction and 11mm in the radial diameter direction, heat at 1...

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Abstract

The invention relates to the technical field of rollers, in particular to a working roller of a temper mill and a manufacturing method thereof.The working roller comprises an outer layer and an inner core, the outer layer is made of high-chromium iron, the inner core is made of ductile iron, a roller sleeve comprises the outer layer and the core, and the outer layer comprises chemical components of 2.1%-3.0% of C, 0.5%-1.5% of Si, 0.2%-1.2% of Mn, smaller than or equal to 0.10% of P, smaller than or equal to 0.1% of S, 10%-30% of Cr, 0.5%-3.0% of Ni, 0.5%-3.0% of Mo, 0.1%-2.0% of V and the balance Fe; the core part comprises the following chemical components in percentage by weight: 2.3-4.0% of C, 1.0-4.0% of Si, 0.1-1.0% of Mn, less than or equal to 0.10% of P, less than or equal to 0.1% of S, less than or equal to 1.0% of Cr, less than or equal to 2.0% of Ni, 0.1-3.0% of Mo and the balance of iron; the performance and quality of the working roll are integrally improved, and the requirements of a conventional forged steel working roll are met.

Description

technical field [0001] The invention relates to the technical field of rolls, in particular to a work roll of a skin pass mill and a manufacturing method thereof. Background technique [0002] At present, the work rolls in the tempering machine are still mainly made of forged steel, the machine time is short, and the production line efficiency is low. The appearance of orange peel in the material rolling process limits the increase in production capacity. [0003] At present, the working rolls of the tempering machine gradually start to improve the material. High chromium ferrocontains a large amount of eutectic carbides, high tempering temperature, high wear resistance, and high surface quality. The combined production of the tempering machine work rolls has the potential The advantages of recycling, at the same time, combined production also provides good conditions for the upgrading of roller sleeve materials. Contents of the invention [0004] The purpose of the pres...

Claims

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Application Information

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IPC IPC(8): B21B27/03B22D19/16C22C37/04C22C37/08C22C37/10
CPCB21B27/032C22C37/10C22C37/08C22C37/04B22D19/16
Inventor 胡兵马凤川杜旭景杜江伟
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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