Crusher roll surfacing technology

A crusher and process technology, used in welding media, manufacturing tools, welding equipment, etc., can solve problems such as poor wear resistance, and achieve the effects of good wear resistance, uniform feeding and easy feeding.

Inactive Publication Date: 2018-12-14
WUHU DINGHAN REMFR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The new crushing rollers are generally used on the machine for at most three months, which will cause a lot of wear and tear, and the wear resistance is poor. In order to reduce the expenditure cost, it is very important to repair the crushing rollers reasonably

Method used

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Embodiment Construction

[0020] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention will be further explained below.

[0021] A crusher roll surfacing process, the specific steps are as follows:

[0022] (1) Defect removal: remove fatigue cracks, sand holes, pits, sharp corners and other defects on the surface of the crusher roll;

[0023] (2) Setting: Select the automatic submerged arc welding machine, set the current 500-520A, the voltage 28-31V, the speed of 500mm / min, and the extension length of the welding wire of 30-35mm;

[0024] (3) Preheating: preheat the crusher roll to 350-400℃ in a heating furnace, keep it for 6-8 hours, and self-made turntable;

[0025] (4) Overlay welding transition: use transitional overlay welding layer to isolate the crusher roll;

[0026] (5) Outer surface: the hard surface layer is welded outside the isolation layer of the crusher roll;

[0027] (6) Cooling: enter the furnace for heat...

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PUM

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Abstract

The invention relates to the field of crusher roll surfacing, in particular to a crusher roll surfacing technology. The technology comprises the following specific steps including (1) defect removing;(2) setting; (3) preheating; (4) surfacing transition; (5) outer surface welding; (6) cooling; and (7) machining. High-alloy martensitic steel serves as surfacing materials and is resistant to a hightemperature, good in abrasion resistance, high in cladding metal hardness, good in high temperature property and capable of bearing a high load; components of a surfacing layer are similar to 4Cr5W8MoV, corresponding soldering flux is used in a matched mode, HRC reaches 59+/-2, the effective thickness of the surfacing layer is 20 mm or above generally, the roll surface is subjected to rough machining after surfacing is completed, and the size restores to the original size according to drawing requirements; and meanwhile, diagonal stripe grooves are formed in the roll surface, feeding is facilitated, and material supplementing is uniform.

Description

Technical field [0001] The invention relates to the field of crusher roll surfacing welding, in particular to a crusher roll surfacing welding process. Background technique [0002] Rolls are important vulnerable spare parts for steel rolling production. Similarly, due to high temperature wear and tear of crusher rolls in sintering plants, the roll surface is vulnerable to damage and even partially peeled off, which affects the output of crushed sintered materials. And the regular shutdown and maintenance are subject to time constraints. At the same time, it also increases maintenance costs and increases business costs. The crusher roll skin generally adopts ZG35CrMnSi material. The newly-made crushing roller is generally used for up to three months on the machine, and it will produce a lot of wear and tear, and the wear resistance is poor. In order to reduce the cost, it is very important to repair the crushing roller reasonably. Summary of the invention [0003] In order to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K9/18B23K9/04B23K103/04
CPCB23K9/04B23K9/18B23K35/3073
Inventor 程敬卿周乾坤薛卫昌
Owner WUHU DINGHAN REMFR TECH
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