A method of improving the service life of rolling mill guide plate

A technology of guide plate and life, which is applied in the field of rolling mill parts preparation and regeneration manufacturing, can solve the problems of frequent replacement, short life, and wear of rolling mill guide plates, and achieve the effects of reducing stress concentration, improving wear resistance, and promoting the formation of graphite

Active Publication Date: 2016-08-24
HEFEI ORIENT METALLURGICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for improving the service life of the rolling mill guide plate in order to solve the problems of severe wear, short life and frequent replacement of the rolling mill guide plate in service

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Micro-alloying: In order to improve the service life of the guide plate of the rolling mill, the original guide plate material QT500-7 is micro-alloyed, and the metal element Mn with a weight ratio of 0.5% and a weight ratio of 1.2 are added to the original guide plate material QT500-7 The metal element Cu is smelted by induction induction furnace, spheroidized in front of the furnace, and poured to obtain the guide plate of the rolling mill. The average hardness of the guide plate is HB306, and the wear resistance is increased by 2 times on average.

[0027] 2. Repair and regeneration: On the basis of the general guide plate, the groove size of the guide plate is increased by 4mm. When the guide plate is worn to a certain extent, the groove size of the guide plate is reduced by 1.5mm by cutting, and then continue to use. With such recycling, the guide plate can be reused twice, increasing the service life by two times.

[0028] 3. Overlay welding regeneration: When ...

Embodiment 2

[0030] 1. Micro-alloying: In order to improve the service life of the guide plate of the rolling mill, the original guide plate material QT500-7 is micro-alloyed, and the metal element Mn with a weight ratio of 0.6% and a weight ratio of 1.0 are added to the original guide plate material QT500-7 The metal element Cu is smelted by induction induction furnace, spheroidized in front of the furnace, and poured to obtain the guide plate of the rolling mill. The average hardness of the guide plate is HB310, and the wear resistance is increased by 2 times on average.

[0031] 2. Repair and regeneration: On the basis of the general guide plate, the groove size of the guide plate is increased by 4mm. When the guide plate is worn to a certain extent, the groove size of the guide plate is reduced by 1.5mm by cutting, and then continue to use. With such recycling, the guide plate can be reused twice, increasing the service life by two times.

[0032] 3. Overlay welding regeneration: When ...

Embodiment 3

[0034] 1. Micro-alloying: In order to improve the service life of the guide plate of the rolling mill, the original guide plate material QT500-7 is micro-alloyed, and the metal element Mn with a weight ratio of 0.8% and a weight ratio of 0.8 are added to the original guide plate material QT500-7 The metal element Cu is smelted by induction induction furnace, spheroidized in front of the furnace, and poured to obtain the guide plate of the rolling mill. The average hardness of the guide plate is HB318, and the wear resistance is increased by 2 times on average.

[0035]2. Repair and regeneration: On the basis of the general guide plate, the groove size of the guide plate is increased by 5mm. When the guide plate is worn to a certain extent, the groove size of the guide plate is reduced by 1.5mm by cutting, and then continue to use. With such recycling, the guide plate can be reused twice, increasing the service life by two times.

[0036] 3. Overlay welding regeneration: When t...

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Abstract

The invention discloses a method for increasing service life of rolling mill guide plate, wherein the original guide plate material QT500-7 is microalloyed for increasing the service life of the rolling mill guide plate, alloying elements Mn and Cu are added in a matching manner, and the microalloyed QT500-7 is used as the material for manufacturing the guide plate; the size of the original guide plate is enlarged when manufacturing the guide plate; when the guide plate is worn so much that the guide plate cannot be used, the guide plate can be regenerated by a manner of reducing the size of the guide plate in order to remove the worn portion, or by a manner of filling up the worn portion through overlaying technology. The method for increasing service life of rolling mill guide plate effectively increases the abrasive resistance of the rolling mill guide plate, greatly increases the service life of the guide plate, and creates significant benefits for enterprises.

Description

technical field [0001] The invention belongs to the field of rolling mill parts preparation and its regeneration manufacturing, and in particular relates to a rolling mill guide plate and its regeneration manufacturing process. Background technique [0002] The guide plate of the rolling mill is a part that consumes a lot in the rolling mill. It bears a large load at high temperature and is subject to various wear and impact. The service life of the guide plate is directly related to the production efficiency of the rolling mill and the surface quality of the rolled piece. Therefore, prolonging the service life of the guide plate has very important practical significance. The main failure mode of the guide plate of the rolling mill is the deep groove worn by the guide plate head. However, in general, the guide plate is replaced directly after failure without maintenance, which not only wastes enterprise resources, but also increases enterprise costs. So far, the materials c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/00C22C37/04C22C33/08
CPCB23P6/00C22C33/08C22C37/04
Inventor 吴鹏李文曹文明赵仕章梁海峰郁应海王磊张有德
Owner HEFEI ORIENT METALLURGICAL EQUIP
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