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Method for repairing nonferrous metals ore guide trough

A non-ferrous metal and repair method technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of air holes, inclusions and cracks in the guide groove, lack of adaptability, etc., to achieve simple process, improved hardness, controllable strong effect

Inactive Publication Date: 2015-01-28
北京中纬研科新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the surfacing welding technology itself, it is very easy to produce defects such as air holes, inclusions and cracks in the guide groove after the surfacing welding repair; moreover, due to the existence of welding thermal stress during the repair, the cracks in the surfacing layer tend to expand. into the base material of the guide trough, which directly leads to the scrapping of the guide trough
The traditional surfacing welding repair process has been unable to meet the special requirements of large-capacity, high-hardness non-ferrous metal ore transportation, cannot meet the needs of continuous production, and does not have good adaptability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, disassemble the stainless steel guide trough parts made of 1Cr13 that need to be repaired, clean the workpiece, and conduct a preliminary inspection to determine the wear part of the guide trough, the wear amount is 3mm; the high-power semiconductor laser is used to dry the guide trough. In order to improve the hardness of the worn parts, the process parameters of dry burning are: laser power P=1600W, rectangular spot 2.5×11.5mm, no overlap, scanning speed 1400mm / min; the particle size that will account for 75% of the total mass is 60- 180 mesh Fe6 powder and 25% of the total mass of WC powder with a particle size of 100-300 mesh are put into a mechanical powder mixer and fully mixed for 1 hour to obtain Fe6+WC alloy powder; adopt coaxial powder feeding method, powder feeder The powder transmission speed is 100g / min; the high-power semiconductor laser is used to scan the cladding. The cladding process parameters are: laser power P=1200W, rectangular spot 2.5×11.5mm...

Embodiment 2

[0023] First, disassemble and clean the stainless steel guide trough components of 1Cr13 that need to be repaired, and conduct a preliminary inspection to determine the wear parts of the guide trough, the wear amount is 4mm; the high-power semiconductor laser is used to dry the wear of the guide trough In order to improve its hardness, the process parameters of dry burning are: laser power P=1600W, rectangular spot 2.5×11.5mm, no overlap, scanning speed 1400mm / min; the particle size that will account for 80% of the total mass is 60-180 The target Fe6 powder and 20% of the total mass of the WC powder with a particle size of 100-300 meshes are put into a mechanical powder mixer and fully mixed for 1.5 hours to obtain Fe6+WC alloy powder; using coaxial powder feeding method, the powder feeder The powder transmission speed is 180g / min; using high-power semiconductor laser scanning cladding, the cladding process parameters are: laser power P=2000W, rectangular spot 2.5×11.5mm, overla...

Embodiment 3

[0025] First, disassemble and clean the stainless steel guide trough parts of 1Cr13 that need to be repaired, and conduct a preliminary inspection to determine the wear parts of the guide trough, the wear amount is 2.5mm; the high-power semiconductor laser is used to dry the guide trough. In order to improve the hardness of the worn part, the process parameters of dry burning are: laser power P=1600W, rectangular spot 2.5×11.5mm, no overlap, scanning speed 1400mm / min; the particle size that will account for 80% of the total mass is 60- 180 mesh Fe6 powder and 20% of the total mass of WC powder with a particle size of 100-300 mesh are put into a mechanical powder mixer and fully mixed for 1.5 hours to obtain Fe6+WC alloy powder; using coaxial powder feeding method, powder feeder The powder transmission speed is 200g / min; the high-power semiconductor laser is used for scanning cladding. The cladding process parameters are: laser power P=2500W, rectangular spot 2.5×11.5mm, overlap ...

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Abstract

The invention discloses a method for repairing a nonferrous metals ore guide trough. The method comprises the following steps: (1) disassembling and washing equipment and determining the worn part of the guide trough and the dimension of the worn part; (2) burning the worn part by using a semiconductor laser; (3) putting WC powder which accounts for 10-30 % of the total mass and Fe6 powder which accounts for 70-90 % of the total mass into a mechanical powder mixer, and mixing the two powders for 1-2 hours to obtain Fe6+WC alloy powder; (4) cladding the alloy powder on the burned worn part of the guide trough by using a large-power semiconductor laser;(5) mechanically machining the surface of the clad guide trough, checking whether the guide trough is defective or not, checking the dimension of the remanufactured guide trough and assembling the equipment after the guide trough reaches standards. The method for repairing the nonferrous metals ore guide trough, disclosed by the invention, has the advantages that the process is simple, the controllability is strong, the wear resistance of the guide trough can be effectively improved, and the service life can be prolonged.

Description

Technical field [0001] The invention belongs to the field of mechanical processing, and particularly relates to a method for repairing a guide trough for non-ferrous metal mines. Background technique [0002] The guide trough is one of the important equipment in the transportation of non-ferrous metal ore, and its function is to transport the high-hardness non-ferrous metal ore after mining to the crusher. At present, the guide trough has always been the main bottleneck for the increase in the transportation rate of non-ferrous metal ore. One of the important reasons is that the guide trough for non-ferrous metal mines wears fast and has a short service life. Once the guide trough is damaged, continuous production will be interrupted. , Which directly affects the production cost and production efficiency of the enterprise. [0003] In view of how to repair and improve the life of non-ferrous metal mining guide troughs, the most important method at present is to use traditional har...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C21D1/30C23F17/00
CPCC21D1/30C23C24/103C23F17/00
Inventor 郭长永
Owner 北京中纬研科新材料有限公司
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