Composite wear-resistant liner of sandwich structure

A wear-resistant liner, liner technology, applied in the direction of layered products, chemical instruments and methods, metal layered products, etc., can solve the problem of pure polyurethane sheet tearing grinding efficiency, limited temperature and aging resistance, line The problem of large difference in expansion coefficient can achieve the effect of avoiding heat treatment process, high wear resistance and excellent bonding performance.

Inactive Publication Date: 2013-04-24
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention solves the problems of fragmentation of bulk ceramics under impact, poor corrosion resistance of a single metal material, tearing of pure polyurethane in pieces under abrasive conditions, and low grinding efficiency
However, the temperature and aging resistance of polyurethane polymer materials is limited, which limits its application fields to a large extent.
[0005] At present, materials such as high-strength steel and chromium-manganese cast steel are mostly used to prepare the lining plate or to repair the lining plate by surfacing welding. The pretreatment process required before welding includes annealing, machining, coloring flaw detection, preheating, etc., and may also be caused by surfacing. The difference between the welding layer and the base metal composition is large, and the linear expansion coefficient is also large, which causes a large internal stress, which causes cracks and peeling of the surfacing layer during cooling

Method used

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  • Composite wear-resistant liner of sandwich structure
  • Composite wear-resistant liner of sandwich structure
  • Composite wear-resistant liner of sandwich structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take Q550 steel for cutting, cold-press to form the desired liner shape, and blast the surface; adjust the ratio of adhesive to Ni-15 powder to 1:20, adjust it to a viscous state with alcohol, apply it to the surface of the sample, and place it on the resistance Dry in an oven at 150 °C for 1 h. First, use an oxygen-acetylene flame to preheat the sample to 780 ° C ~ 820 ° C; then carry out flame remelting, use an oxygen-acetylene flame neutral partial carbon flame to remelt the above sample, and the distance between the spray gun and the surface of the workpiece is about 25~ 30 mm, at an angle of 75° to the plane of the sample, the remelting gun travel speed is 120~140mm / min, the oxygen pressure is 0.30MPa, and the acetylene pressure is 0.10MPa; when the surface appears / mirror reflection, air cooling. Then use the same process as above to coat with Ni-60 and WC-17%Co (ratio of 4:1), and the thickness of the coating after two remelting is about 1.2~1.6mm.

[0027] The d...

Embodiment 2

[0029] Take Q235 steel for cutting, cold pressing to form the desired liner shape, and sandblasting the surface; the ratio of adhesive to F-103 powder is 1:20, adjusted to a viscous state with alcohol, coated on the surface of the sample, placed on the resistance Dry in an oven at 150 °C for 1 h. First, use an oxygen-acetylene flame to preheat the sample to 780 °C ~ 820 °C; then carry out flame remelting, and use an oxygen-acetylene flame to remelt the above sample with a neutral flame. The distance between the spray gun and the workpiece surface is about 25~30 mm , at an angle of 75° to the sample plane, the remelting gun travel speed is 100~120mm / min, the oxygen pressure is 0.30MPa, and the acetylene pressure is 0.06MPa; when the surface appears / mirror reflection, air cooling. Then use the same process as above to coat with Fe-65 and WC-20%Ni (the ratio is 4:1), and the thickness of the coating after two remelting is about 0.9~1.2mm.

[0030] The dry friction and wear prope...

Embodiment 3

[0032] Take 1025 steel for cutting, cold-press to form the desired liner shape, and blast the surface; adjust the ratio of adhesive to F-101 powder to 1:25, adjust it to a viscous state with alcohol, apply it to the surface of the sample, and place it on the resistance Dry in an oven at 150 °C for 1 h. First, use an oxygen-acetylene flame to preheat the sample to 780 °C ~ 820 °C; then carry out flame remelting, and use an oxygen-acetylene flame to remelt the above sample with a neutral flame. The distance between the spray gun and the surface of the workpiece is about 25~30 mm. , at an angle of 75o to the sample plane, the remelting gun travel speed is 80~100mm / min, the oxygen pressure is 0.30MPa, and the acetylene pressure is 0.08MPa; when the surface appears / mirror reflection, air cooling. Then use the same process as above to coat with Ni-21 and WC-20%Ni (the ratio is 4:1), and the thickness of the coating after two remelting is about 1.2~1.5mm.

[0033]The dry friction an...

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Abstract

The invention discloses a multi-layer composite super-wear-resistant liner of sandwich structure and a preparation process of the liner, belonging to the field of preparation of wear-resistant liners. The wear-resistant liner is composed of a substrate support layer, a bonding transition layer and a hard surface wear-resistant layer by compositing functionally graded materials, wherein the substrate support layer is formed by compression instead of conventional casting; the bonding transition layer is formed by flame remelting with self-fluxing alloy material, having good substrate invasion and high bonding strength; and the hard surface wear-resistant layer is formed by flame remelting with ceramic alloy material, having excellent bonding performance and high abrasive resistance. Compared to the prior art, by gathering the advantages of high toughness of the metal material and high abrasive resistance of the ceramic alloy material, the multi-layer composite super wear-resistant liner of sandwich structure and the preparation process thereof disclosed by the invention have the advantages of simple substrate forming process, low cost, and strong controllability of coating material and process, so that complicated technology for heating processing during an alloy casting process is avoided and the service life is prolonged by more than 10 times compared with that of ordinary steel liners.

Description

technical field [0001] The invention relates to a wear-resistant liner in the fields of general crushing, grinding, crushing and flotation and a preparation method thereof, in particular to a multi-layer composite super wear-resistant liner and a preparation method thereof. Background technique [0002] Wear-resistant linings are widely used in mining, machinery, coal, electric power and other industries, and are often required to have excellent wear resistance. At present, manufacturers have been using materials such as high-strength steel and chrome-manganese cast steel to resist such harsh high wear, but the effect and overall cost have not been ideal. Therefore, it is of great significance for actual production to develop a wear-resistant liner with high hardness and good wear resistance, which can be directly processed to the required shape and placed on the severely worn part, which is not only convenient for maintenance, but also greatly reduces the cost. [0003] Pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/04B32B18/00
Inventor 田雪梅乔红斌邹李华吴胜华古绪鹏杨建国陈国昌郑祎群
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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