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Method for repairing mill housing

A technology of a rolling mill arch and a repair method, applied in the field of rolling mill arch, can solve the problems of wear failure of the arch face, short service life of the arch, etc.

Active Publication Date: 2011-08-10
烟台开发区蓝鲸金属修复有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the invention of this application is to solve the problem that the existing rolling mill archway wears out before the archway is repaired and the service life of the archway is still relatively short after repairing

Method used

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  • Method for repairing mill housing
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  • Method for repairing mill housing

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Embodiment Construction

[0031] Such as figure 1 and figure 2 Shown, the repair method of rolling mill archway of the present invention comprises the following steps:

[0032] (a). Clean and clean the surface of the rolling mill archway to be repaired, and remove the oil and impurities on the surface of the rolling mill archway to be repaired;

[0033] (b) Carry out coloring flaw detection on the surface of the entire rolling mill archway to be repaired, the coloring flaw detection is to use ultrasonic, magnetic, X-ray or gamma ray flaw detection, measure the size of the archway, and determine the amount of wear;

[0034] (c) remove the fatigue layer on the surface of the rolling mill archway;

[0035] (d) On the width direction and the length direction of the surface of the rolling mill archway to be repaired, at least a block layer 1 with the same material and hardness as the material and hardness of the surface base material 3 of the rolling mill archway to be repaired, the block layer 1 The sh...

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Abstract

The invention relates to a method for repairing a mill housing, which comprises the following steps of: washing and cleaning the surface of the mill housing to be repaired; carrying out dye penetrant inspection on the surface of the whole mill housing to be repaired and measuring the size of the housing; removing a fatigue layer; at least welding latticed block layers through resurfacing welding, which have the same hardness with the material of a substrate of the surface of the mill housing to be repaired, in the width direction and the length direction of the surface of the mill housing to be repaired; carrying out machining on the block layers which are subjected to resurfacing welding on the surface of the mill housing to be repaired; carrying out resurfacing welding on hard layers in gaps among the block layers, wherein the hardness of the hard layers is more than the hardness of 0 to 40HRC of the block layers; and carrying out repairing so that the thickness of the hard layers is the same with the thickness of the block layers and the surface of the repaired mill housing is level and meets the repair requirement. Compared with a method for welding by totally using the hard materials on the whole surface of the housing, the method ensures the machining process easier and is also convenient to machine.

Description

technical field [0001] The invention relates to a rolling mill archway, in particular to a repair method for a rolling mill archway. Background technique [0002] It is reported that the long-term use of the rolling mill arches introduced by large domestic and international steel plants has caused the balance weights of the work rolls and the rack rolls to be affected by impact loads during the steel rolling process, and the arch surfaces are worn to varying degrees, resulting in rolling mills. The archway fails. The failure of this situation will affect the rolling rhythm, reduce the output, and reduce the operating rate of the rolling mill. At the same time, the cost of spare parts and auxiliary costs will also increase significantly. According to the volume, weight, cost, and analysis of the existing working conditions of the archway, replacement The cost of the new archway is too high, so it is necessary to repair the archway. [0003] In the industry of archway restor...

Claims

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Application Information

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IPC IPC(8): B23P6/00
Inventor 孙京钢陈佃双
Owner 烟台开发区蓝鲸金属修复有限公司
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