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Technique and method for preparing biconical roller of large-sized strip hot-rolling mill transport roller

A production process and technology of a hot rolling mill, which is applied in the field of production process of double-cone rollers for transporting rollers of large-scale strip hot rolling mills, can solve problems such as inapplicability, and achieve the effect of uniform hardness

Inactive Publication Date: 2009-02-04
洛阳市双勇机器制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process cannot be applied to the overall surface quenching of cylindrical and conical workpieces

Method used

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  • Technique and method for preparing biconical roller of large-sized strip hot-rolling mill transport roller
  • Technique and method for preparing biconical roller of large-sized strip hot-rolling mill transport roller

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Embodiment Construction

[0067] Embodiments of the present invention are given to illustrate the present invention, but do not constitute any limitation to the present invention:

[0068] According to the structural characteristics and technical requirements of the double-cone rollers on the conveying roller table of the hot strip rolling mill, the processing technology of the double-conical rollers on the conveying roller table of the hot strip rolling mill is determined as follows:

[0069] 1) First, select a forging machine tool with a suitable tonnage to forge blanks, and the forging ratio must not be less than 3.5. In order to obtain a good forging with uniform distribution of chemical composition. Otherwise, the uneven distribution of chemical components will cause uneven quenching hardness on the surface of the roll body. The material of the double tapered roller of the conveying roller table is 45 or 42CrMo.

[0070] 2) The first heat treatment of the forging adopts normalizing treatment. T...

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Abstract

The invention belongs to a roller production technology of a slab band hot milling roll transport roller way. The invention provides a biconical roller production technology of a large-sized slab band hot milling roll transport roller way as follows: forging blank piece normalizing treatment, ultrasonic inspecting, rough machining before thermal refining, thermal refining, semifinishing, roller body surface quenching, tempering, finish machining and inspection of all surface magnetic powder of the roller or dye penetration; in the processes of the roller body surface quenching and the tempering, the biconical roller is divided into different heating sections according to the roller body structural size of the biconical roller, the different sections of the biconical body adopt the mode of different heating strength and same heating time according to different structures of the sections, so that all surfaces of the roller can simultaneously obtain the identical quenching temperature and the identical depth of temperature penetration; in order to obtain the proper quenching hardness and the sufficient hardening layer and simultaneously avoid quenching cracks and reduce quenching deformation, the invention adopts the technique of water-oil double medium quenching.

Description

technical field [0001] The invention belongs to a production technology of rollers on a conveying roller table of a strip hot-rolling mill, and mainly relates to a production process method of a double-cone roller on a conveying roller table of a large-scale hot strip rolling mill. Background technique [0002] With the rapid development of the national economy, the use of high-quality plates is becoming more and more widespread, and the demand for high-quality plates is increasing. The production of high-quality plate depends on the production process, slab quality and rolling equipment. [0003] To obtain high-quality cold-rolled plates, high-quality hot-rolled slabs are necessary. The production of high-quality hot-rolled slabs not only has high requirements on the hot-rolling process and the quality of hot-rolled slabs, but also has strict requirements on the rolling equipment—hot-rolling mills. Only high-quality hot-rolling equipment can roll high-quality hot-rolled s...

Claims

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Application Information

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IPC IPC(8): C21D9/38C21D1/18
Inventor 郭铁军朱壮连
Owner 洛阳市双勇机器制造有限公司
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