Wide thick plate hot-straightening machine working roll and manufacturing method thereof

A technology of straightening machines and work rolls, which is applied in the direction of manufacturing tools, heat treatment furnaces, heat treatment equipment, etc., and can solve problems such as insufficient matrix strength and red hardness

Active Publication Date: 2015-09-30
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the main reasons for such indentations is that the matrix strengt

Method used

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  • Wide thick plate hot-straightening machine working roll and manufacturing method thereof
  • Wide thick plate hot-straightening machine working roll and manufacturing method thereof
  • Wide thick plate hot-straightening machine working roll and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1 is a kind of work roll for wide and thick plate heat straightening machine with a width of 1300-4900mm and a thickness of 10-100mm, and its chemical composition includes according to mass percentage:

[0053]

[0054] The diameter of the finished straightening machine work roll is 360mm, the length of the roll body is 5200mm, and there are cooling water holes in the middle.

[0055] The preparation method includes the following steps: (1) Roughly processing the raw material into a roll billet through forging and post-forging heat treatment; (2) Quenching and tempering heat treatment; (3) Final heat treatment; (4) Tempering treatment; (5) Finishing.

[0056] The diameter of the finished straightening machine work roll is 360mm, the length of the roll body is 5200mm, and there are cooling water holes in the middle.

[0057] During preparation,

[0058] The forging process in step (1) is as follows: the heating temperature is 1150°C, the initial forging te...

Embodiment 2

[0067] Embodiment 2 is a work roll for a wide and thick plate thermal straightening machine with a width of 1300-4900 mm and a thickness of 10-100 mm. Its chemical composition includes:

[0068]

[0069] The diameter of the finished straightening machine work roll is 360mm, the length of the roll body is 5200mm, and there are cooling water holes in the middle.

[0070] The preparation method includes the following steps: (1) Roughly processing the raw material into a roll billet through forging and post-forging heat treatment; (2) Quenching and tempering heat treatment; (3) Final heat treatment; (4) Tempering treatment; (5) Finishing.

[0071] The diameter of the finished straightening machine work roll is 360mm, the length of the roll body is 5200mm, and there are cooling water holes in the middle.

[0072] During preparation,

[0073] The forging process in step (1) is as follows: the heating temperature is 1150°C, the initial forging temperature is 1100°C, and the final...

Embodiment 3

[0082] Embodiment 3 is a work roll for a wide and thick plate thermal straightening machine with a width of 1300-4900 mm and a thickness of 10-100 mm. Its chemical composition includes:

[0083]

[0084]

[0085] The diameter of the finished straightening machine work roll is 360mm, the length of the roll body is 5200mm, and there are cooling water holes in the middle.

[0086] The preparation method includes the following steps: (1) Roughly processing the raw material into a roll billet through forging and post-forging heat treatment; (2) Quenching and tempering heat treatment; (3) Final heat treatment; (4) Tempering treatment; (5) Finishing.

[0087] The diameter of the finished straightening machine work roll is 360mm, the length of the roll body is 5200mm, and there are cooling water holes in the middle.

[0088] During preparation,

[0089] The forging process in step (1) is as follows: the heating temperature is 1150°C, the initial forging temperature is 1100°C, a...

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Abstract

The invention discloses a wide thick plate hot-straightening machine working roll which comprises the following chemical components in percentage by mass: 0.45-0.55% of C, 0.8-1.5% of Si, 0.8-1.5% of Mn, 3.0-4.0% of Cr, 3.0-4.0% of Mo, 0.8-1.2% of V, 0.3-1.0% of Al, and the balance of Fe and inevitable impurities. The wide thick plate hot-straightening machine working roll can satisfy the technical requirements for the wide thick plate hot-straightening roll, and has higher matrix strength and red hardness than the existing H13 material. The invention also discloses a preparation method of the wide thick plate hot-straightening machine working roll.

Description

technical field [0001] The invention relates to the field of straightening roll materials and manufacturing, in particular to a work roll for thermal straightening of wide and thick plates with a width of 1300-4900mm and a thickness of 10-100mm, and for reducing indentation on the steel plate surface and a manufacturing method thereof. Background technique [0002] In the layout of rolling line equipment in domestic and foreign wide and thick plate mills, the arrangement of rolling mill-accelerated cooling-hot leveler has become the basic configuration. The hot leveler is arranged after accelerated cooling, and the steel plate cannot To avoid various plate shape defects and residual internal stress, through the reasonable roll gap setting of the hot straightening machine, the strip will undergo large elastic-plastic deformation at high temperature, and realize repeated bending to achieve straightening of the steel plate, The purpose of improving plate shape and reducing inte...

Claims

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Application Information

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IPC IPC(8): C22C38/24C21D8/00C21D9/38B21D1/02B23P15/00
Inventor 吴琼范群孙大乐张志忠
Owner BAOSHAN IRON & STEEL CO LTD
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