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Process for preparing antioxidant and wear-resistant layer on surface of copper

A preparation process and technology of copper surface, applied in the direction of metal material coating process, coating, melting spray plating, etc., can solve the problems of environmental pollution, low production efficiency, long heat treatment time, etc.

Inactive Publication Date: 2010-02-03
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also has some disadvantages. The workpiece needs to be sealed in a can, the heating treatment takes a long time, the production efficiency is low, the production cost is high, and the active substance added at the same time as the aluminizing agent pollutes the environment.

Method used

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  • Process for preparing antioxidant and wear-resistant layer on surface of copper
  • Process for preparing antioxidant and wear-resistant layer on surface of copper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, the pure copper workpiece is sandblasted with 20# brown corundum sand, and then the surface is arc sprayed with pure aluminum coating. The arc spraying process parameters are: wire diameter 2mm, spraying voltage 31V, spraying current 130A, atomizing air pressure 0.5MPa, distance between workpiece and spray gun 150mm. When spraying, the spray gun should be moved regularly and quickly to obtain a dense and uniform aluminum coating. Local overheating should be prevented to generate large stress, which will cause the coating to crack or separate from the substrate. The final thickness of the coating is about 2.5mm. Then use 1 mm diameter steel shot to do shot peening on the surface coating of the test piece. Use a jet-suction sandblasting gun with a spray distance of 120mm and an air pressure of 0.3MPa. The shot blasting gun should move quickly to cause uniform surface plastic deformation and uniform compressive stress distribution. Then add 1000 mesh Al to the co...

Embodiment 2

[0019] A layer of 0.1mm thick pure molybdenum coating was arc sprayed on the surface of the copper specimen after sandblasting of 20# brown corundum. The parameters of the arc spraying process are: the wire diameter is 2mm, the spraying voltage is 35V, the spraying current is 200A, the spraying distance is 120mm, and the atomizing air pressure is 0.6MPa. A 1 mm thick pure aluminum coating was then arc sprayed on top of the molybdenum coating. The process parameters of aluminum coating arc spraying are: wire diameter 2mm, spraying voltage 31V, spraying current 130A, atomizing air pressure 0.5MPa, distance between workpiece and spray gun 150mm. The total thickness of the coating after spraying is 1.5 mm. The subsequent shot blasting, coating of sealant, and heating and diffusion treatment are all the same as in Example 1. The thickness of the infiltrated layer obtained after heating is 1.5mm, which is smaller than that of the sample with simple sprayed aluminum coating (under ...

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Abstract

The invention provides a process method for preparing an aluminide penetrating layer on the surface of pure copper or a copper alloy by combining the thermal spraying technology and the thermal treatment technology, which comprises the following steps: firstly, spraying a layer of pure aluminium coating on the surface of a copper product through arc; secondly, performing shot blasting and sealingagent coating treatment on the surface of the coating; and finally, performing thermal treatment at a temperature of between 800 and 900 DEG C, maintaining the temperature for 2 to 4 hours, and obtaining an aluminide layer over 3mm on the surface of the pure copper. The aluminide layer prepared by the method has good combination with a copper substrate, good antioxidant performance and good wear resistance. The method can prepare the aluminide penetrating layer, and also can prepare aluminium-molybdenum, aluminium-silicone, aluminium-chromium binary or multi-metallic diffusion layers.

Description

technical field [0001] The invention relates to a technology for preparing a high-temperature oxidation-resistant and wear-resistant aluminized layer on the surface of pure copper or copper alloy by a thermal spraying method, and the invention can also be used for preparing a multi-element alloyed layer of aluminum and other elements. Background technique [0002] Pure copper has high thermal conductivity, electrical conductivity and corrosion resistance, and is widely used in metallurgical and petrochemical industries. For example, pure copper is used to manufacture tuyeres, slag ports, staves, converter oxygen lance nozzles, billet thermal cutting torch burners, crystallizers in steelmaking continuous casting machines, and some chemical equipment components in ironmaking blast furnaces. The working environment of these parts is in direct contact with high temperature liquid or gas medium on one side, and in direct contact with cooling medium such as water or gas on the oth...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23G1/00C22F1/08C23C4/06
Inventor 张忠礼李德元董晓强
Owner SHENYANG POLYTECHNIC UNIV
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