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Repair technological method for improving wear resistance of squeezing roller

A process method and extrusion roller technology, applied in the direction of manufacturing tools, metal processing equipment, welding media, etc., can solve problems such as difficult research, and achieve the effect of improving wear resistance and service life

Inactive Publication Date: 2019-02-01
浙江申轮水泥机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, it is still difficult to study the surfacing repair of the extrusion roller of the roller press, and there is no ideal, practical, economical and reliable protective layer solution

Method used

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  • Repair technological method for improving wear resistance of squeezing roller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] It mainly includes the following steps:

[0027] Step 1. Pre-treat the surface of the extrusion roll to remove the fatigue layer, and use automatic short arc cutting or carbon arc gouging to completely remove the hard surface layer. After the removal, use an ultrasonic flaw detector to perform ultrasonic flaw detection on the roller shaft and the roller surface , if there is a crack, remove the crack completely, if there is a pit with a depth of more than 8mm, repair the pit with manual welding, repair the pipe wire to the pit, and remove the welding slag after each pit is welded Weld the next one;

[0028] Step 2. Clamp the planed extrusion roller on the lathe, round the outer circle, and then heat and dehumidify the roller surface. The surface temperature is heated to above 150°C, and the surfacing can be carried out;

[0029] Step 3: The first layer of surfacing welding on the extrusion roller surface is a buffer layer, the buffer layer is an austenitic alloy, and t...

Embodiment 2

[0034] It mainly includes the following steps:

[0035] Step 1. Pre-treat the surface of the extrusion roll to remove the fatigue layer, and use automatic short arc cutting or carbon arc gouging to completely remove the hard surface layer. After the removal, use an ultrasonic flaw detector to perform ultrasonic flaw detection on the roller shaft and the roller surface , if there is a crack, remove the crack completely, if there is a pit with a depth of more than 8mm, repair the pit with manual welding, repair the pipe wire to the pit, and remove the welding slag after each pit is welded Weld the next one;

[0036] Step 2. Clamp the planed extrusion roller on the lathe, round the outer circle, and then heat and dehumidify the roller surface. The surface temperature is heated to above 150°C, and the surfacing can be carried out;

[0037] Step 3: The first layer of surfacing welding on the extrusion roller surface is a buffer layer, the buffer layer is an austenitic alloy, and t...

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Abstract

The invention discloses a repair technological method for improving the wear resistance of a squeezing roller, and relates to the technical field of squeezing roller repair. The method comprises the steps of pretreating the surface of the squeezing roller for removing a fatigue layer, and removing a hard-surface layer thoroughly; performing ultrasonic flaw detection for a roll shaft and the rollersurface with an ultrasonic flaw detector after removal; removing cracks thoroughly if the cracks exist; and filling in pits through manual welding if the pits with the depth of more than 8 mm exist.According to the repair technological method, by adopting a four-layer surfacing squeezing roller repair technology, the surfacing thickness of the hard-surface layer is 8-10 mm, and the hardness of the hard-surface layer can reach 52-55 HRC; a stainless steel strip is used as a substrate, and made into a welding wire for surfacing a wear-resistant pattern layer; the surfacing thickness of a wear-resistant pattern is 3-5 mm, and the maximum hardness can reach 70 HRC; and the repair technological method has the characteristics of high toughness and hardness, and the wear resistance of the squeezing roller can be further improved, and the service life of the squeezing roller is prolonged.

Description

technical field [0001] The invention belongs to the technical field of squeeze roll repair, in particular to a repair process method for improving the wear resistance of squeeze rolls. Background technique [0002] Roller press is a high-efficiency, energy-saving and widely used grinding equipment imported from abroad in the early 1990s, which is suitable for grinding cement raw materials, clinker, ore, etc. The key part of the roller press is the extrusion roller. A pair of extrusion rollers squeeze the material 25-50t / h on average and work continuously for 24 hours. The extrusion roller of the roller press is subject to abrasive wear and stress fatigue damage under high pressure. It is required that the surfacing layer on the roller surface has a high hardness, and the occurrence of cracks should be limited to prevent cracks from expanding under repeated high stress. [0003] During the operation of the roller press, the roller surface is in direct contact with the materi...

Claims

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Application Information

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IPC IPC(8): B23P6/00B23K35/30
CPCB23K35/0266B23K35/3086B23P6/00
Inventor 陈旭锋丰小军吴慧明
Owner 浙江申轮水泥机械制造有限公司