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Straightening roller for cold rolling of wide and thick plate and manufacturing method thereof

A manufacturing method and a technology of straightening rolls, which are applied in the direction of improving process efficiency and energy efficiency, can solve the problems of less than 10% elongation and technical indicators that cannot meet rolling requirements, and overcome deflection and rigidity. , reduce residual stress and avoid bending deformation

Active Publication Date: 2009-08-26
BAOSTEEL ROLL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the yield strength of current cold-rolled straightening rolls is only 600MPa-700MPa, and the elongation is less than 10%, and the technical indicators cannot meet the rolling requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The straightening roll used for cold-rolling wide and thick plates in this embodiment is a solid roll with a length of 6 m, an aspect ratio of 30, a yield strength of 850 MPa, and an elongation of 15%.

[0012] The manufacturing method of the straightening roll used for cold-rolling wide and thick plates of the present embodiment has the following steps:

[0013] ① Place the solid roll blank made of MC5 material with a roll body length of 5m-7m and an aspect ratio of 15-30 horizontally, and perform rough turning and quenching and tempering heat treatment on it, so that the bending deformation of the roll blank is less than 2mm, so that the adjusted Quality roll blank.

[0014] ② Place the quenched and tempered roll blank obtained in step ① horizontally, and quench it with medium-frequency induction heating and quenching equipment. The temperature of the roll blank during heating is 980°C to 1050°C. In addition to frame support, a center frame is also used to support th...

Embodiment 2～ Embodiment 5

[0018] Each embodiment is basically the same as Embodiment 1, and the differences are shown in Table 1.

[0019] Table 1

[0020] Example 1

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Abstract

The invention discloses a straightening roller for cold rolling of a wide and thick plate and a manufacturing method thereof. The straightening roller is solid, length of the roller body is 5-7m, and ratio of length to diameter is 15-30. The manufacturing method includes steps: transversely placing a solid roller blank of MC5 material with length of 5-7m and ratio of length to diameter of 15-30, carrying out rough lathing and modified heat treatment to make bending deflection of the roller bland less than 2mm; carrying out quenching by using a intermediate frequency induction heating quenching device, wherein temperature is from 980 DEG C to 1050 DEG C, and a central rack is used for supporting the roller body in the quenching process; carrying out low-temperature tempering with temperature from 110 DEG C to 150 DEG C; and carrying out grinding processing during which two coordination racks are used for supporting the roller body. The yield strength of the straightening roller of the present invention can reach 830-870MPa, elongation can reach 10-20%, so that the straightening roller can be used for cold rolling of the wide and thick plate.

Description

technical field [0001] The invention relates to a straightening roll and a manufacturing method thereof, in particular to a straightening roll for cold-rolling wide and thick plates and a manufacturing method thereof. Background technique [0002] At present, controlled cooling and controlled rolling are generally used for wide and thick plates, and the method of gradually reducing the straightening temperature of the hot leveler is used for heat treatment, and the wide and thick plates are often cold straightened after heat treatment to improve the quality of the product. Therefore, the cold straightening machine on the heat treatment line has become a necessary equipment. With the development of modern rolling technology towards high speed and high precision, more and more stringent requirements are put forward for the service performance of rolls, especially cold straightening rolls with straightening function. However, the yield strength of current cold-rolled straighte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D1/02C21D1/18C21D1/25C21D1/42
CPCY02P10/25
Inventor 张青沈新群段洪波万锦明丁辉
Owner BAOSTEEL ROLL SCI & TECH
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