Continuous flame quenching heat treatment method and device for roll necks

A heat treatment method and heat treatment device technology, applied in the field of iron and steel forging, can solve the problems of shallow hardened layer, matrix hardness not reaching the ideal hardness value, and low hardness value, so as to achieve stable roll surface structure, increase hardness, prevent scratches and The effect of mechanical damage

Inactive Publication Date: 2017-08-18
安徽宝昌联合轧辊有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the hardness of roll necks of back-up rolls produced by most domestic roll manufacturers is difficult to meet the above requirements
The hardness of the roll neck of some manufacturers is obtained through rolling hardening, the hardness value is low, the hardened layer is shallow, or the hardness of the matrix obtained through the quenching and tempering of the roll billet is used as the hardness of the roll neck, and the hardness of the matrix cannot reach the ideal hardness. value

Method used

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  • Continuous flame quenching heat treatment method and device for roll necks

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The surface of the roll neck to be quenched is processed to the required size, and the surface of the roll neck is kept smooth without burrs; the roll is hoisted to the quenching machine, and the rotation speed of the roll and the displacement speed of the quenching device are set; the quenching oxygen lance is manually ignited, and the initial part is heated When the set austenitizing temperature is -100C, the quenching device starts to move; when the quenching device starts to move, the water-cooled spray gun is turned on, and the surface quenching of the roll neck bearing position is gradually and continuously completed according to the mode of first heating and then quenching; after the quenching process is completed, First turn off the quenching oxygen lance, and then turn off the water-cooling spray gun after 3 to 5 minutes to complete the flame quenching of the roll neck; use the crane to turn the roll around, and complete the flame quenching on the surface of the ...

Embodiment 2

[0035] like figure 1 The shown continuous flame quenching heat treatment device for roll necks comprises a quenching machine tool 1, the two ends of the quenching machine tool 1 are respectively provided with a head box 2 and a tailstock top 3, and the quenching machine tool 1 is provided with a chuck drive 4, so that The chuck drive 4 is controlled to rotate through the bedside box 2; the outside of the quenching machine tool 1 is provided with a tool seat carriage 5, and the knife seat carriage 5 is provided with a quenching device 6, and the quenching device 6 is mounted on the knife seat carriage through the bottom pulley. 5, the quenching device 6 includes a quenching oxygen lance 61 and a water-cooled lance 62, and the angle between the nozzle of the water-cooling lance 62 and the quenching oxygen lance 62 is 30°; the height of the quenching device 6 is determined by the mechanical arm 7 Adjustments to suit different diameter rolls.

[0036] During the specific work of ...

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Abstract

The invention discloses a continuous flame quenching heat treatment method for roll necks. The method comprises the following steps: carrying out displacement type quenching on a roll neck when a roll rotates; and after quenching on one side of the roll neck is finished, turning the roll and quenching the roll in the same mode. Meanwhile, the invention further discloses a continuous flame quenching heat treatment device for roll necks. The roll neck with the surface hardness of 40-55 HSc can be obtained, service conditions of a roll bearing are met, the roll rotates in a quenching process, a quenching device continuously moves from one side to the other side at constant speed, quenching uniformity is good, quenching operation is simple, and a process is controlled stably.

Description

technical field [0001] The invention belongs to the field of iron and steel forging, and in particular relates to a roll neck continuous flame quenching heat treatment method and a treatment device. Background technique [0002] With the continuous improvement of rolling mill manufacturing level, more and more enterprises invest in the construction of modern rolling mills with high rolling force, high control precision, high automation and continuous rolling. High-performance rolling mills put forward higher requirements for rolls. In order to obtain better plate shapes, advanced rolling mills use bearings produced by world-renowned bearing manufacturers. Bearing manufacturers put forward higher requirements for roll surface hardness and stricter dimensional and shape tolerances for roll neck bearing positions. At present, the hardness of roll necks of back-up rolls produced by most domestic roll manufacturers is difficult to meet the above requirements. The hardness of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/38C21D1/18C21D1/62
CPCC21D9/38C21D1/18C21D1/62C21D9/0062
Inventor 方光志邵黎军江玮
Owner 安徽宝昌联合轧辊有限公司
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