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A kind of repairing method of guide chute for non-ferrous metal mine

A non-ferrous metal and repair method technology, applied in the field of mechanical processing, can solve problems such as inclusions and cracks, pores in the guide groove, lack of adaptability, etc., and achieve the effects of improving hardness, avoiding cracks, and strong controllability

Inactive Publication Date: 2017-05-24
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 1Cr13 stainless steel guide tank parts that need to be repaired, clean the workpiece, and conduct a preliminary inspection to determine the worn part of the guide tank, and the wear amount is 3mm; use a high-power semiconductor laser to dry burn the guide tank. 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 of 75% of the total mass will be 60- 180 mesh Fe6 powder and 25% of the total mass of WC powder with a particle size of 100-300 mesh are placed in a mechanical powder mixer and fully mixed for 1 hour to obtain Fe6+WC alloy powder; the coaxial powder feeding method is adopted, and the powder feeder The powder transmission speed is 100g / min; high-power semiconductor laser is used to scan cladding, and the process parameters of cladding are: laser power P=1200W, rectangular spot 2.5×11.5mm, overla...

Embodiment 2

[0023] First, disassemble and clean the stainless steel guide trough parts that need to be repaired, and conduct a preliminary inspection to determine the wear part of the guide trough, and the wear amount is 4mm; use a high-power semiconductor laser to dry burn the wear of the guide trough Parts, 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 of 80% of the total mass will be 60-180 The purpose 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; adopt the coaxial powder feeding method, the powder feeder The powder transmission speed is 180g / min; a high-power semiconductor laser is used to scan the cladding, and the cladding process parameters are: laser power P=2000W, rectangular spot 2.5×11.5mm, overlapping ra...

Embodiment 3

[0025] First, dismantle and clean the 1Cr13 stainless steel guide tank parts that need to be repaired, and conduct a preliminary inspection to determine the worn part of the guide tank, and the wear amount is 2.5mm; use a high-power semiconductor laser to dry burn the guide tank. 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 of 80% of the total mass will be 60- 180-mesh Fe6 powder and 20% of the total mass of WC powder with a particle size of 100-300 mesh are placed in a mechanical powder mixer and mixed for 1.5 hours to obtain Fe6+WC alloy powder; the coaxial powder feeding method is adopted, and the powder feeder The powder transmission speed is 200g / min; high-power semiconductor laser is used to scan cladding, and the process parameters of cladding are: laser power P=2500W, rectangular spot 2.5×11.5mm, overlapping rate 20%...

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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 in particular relates to a method for repairing a material guide groove for nonferrous metal mines. Background technique [0002] The guide chute is one of the important equipment in the transportation of non-ferrous metal ore, and its function is to transport the mined high-hardness non-ferrous metal ore to the crusher. At present, the guide trough has always been the main bottleneck for the improvement of the non-ferrous metal ore transportation operation rate. One of the important reasons is that the guide trough for non-ferrous metal ore wears quickly and has a short service life. Once the guide trough is damaged, the continuous production will be interrupted. , which directly affects the production cost and production efficiency of the enterprise. [0003] Aiming at how to repair and improve the service life of the non-ferrous metal mine guide groove, the most important method at pr...

Claims

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Application Information

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Patent Type & Authority Patents(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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