Seamless copper alloy pipe with excellent anti-corrosion performance for heat exchanger and preparation method thereof

A technology for heat exchangers and copper alloys, applied in the field of seamless copper alloy tubes and their preparation, can solve problems such as reduced corrosion resistance and leakage of cooling media

Active Publication Date: 2006-09-06
江阴和宏精工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the condition that the dissolved solids in the polluted water are greater than 1000 mg / liter, the corrosion resistance of the HSn70-1 arsenic-tin brass tube is significantly reduced, and in severe cases, it may cause a quality accident of the leakage of the cooling medium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The raw materials 350kg cathode copper, 140kg zinc ingot, 5.5kg tin ingot, 0.68kg arsenic copper alloy (CuAs30) and 1kg electrolytic nickel are used in a cored power frequency induction furnace (divided into copper melting furnace and holding furnace) according to a certain feeding sequence ( Copper+nickel→melting→adding tin+zinc→arsenic copper alloy) sequentially add copper melting furnace to melt into copper liquid alloy, melting temperature: 1090℃, when the material is completely melted, the temperature reaches 1100~1160℃, then move the copper alloy liquid into Holding furnace, holding temperature: 1150-1170°C, add 1.7kg of manganese-copper alloy (CuMn30) to the above-mentioned copper alloy liquid for deoxidation to obtain a low-oxygen copper alloy liquid, and then add 2.7kg of copper to the low-oxygen copper alloy liquid The boron alloy (CuB5) is made into the molten copper alloy liquid of the present invention, and then the copper alloy hollow casting slab is pulled...

Embodiment 2

[0017] Use 351kg of cathode copper, 141kg of zinc ingot, 5.6kg of tin ingot, 0.67kg of arsenic copper alloy (CuAs30), and 1.2kg of electrolytic nickel in a cored power frequency induction furnace (divided into copper melting furnace and holding furnace) according to a certain feeding sequence (copper+nickel→melting→adding tin+zinc→arsenic-copper alloy) sequentially add into the copper melting furnace to melt into molten copper alloy (melting temperature: 1090°C), and wait for the material to completely melt and reach a certain temperature (1100~1160°C), Move the copper alloy solution into the holding furnace (holding temperature: 1150-1170°C), add 1.65kg of manganese-copper alloy (CuMn30) to the above-mentioned copper alloy solution for deoxidation to obtain a low-oxygen copper alloy solution, and then in this low-oxygen copper alloy solution The copper-boron alloy (CuB5) that adds 2.8kg is made into the molten copper alloy liquid of the present invention, draws out the copper ...

Embodiment 3

[0019] The raw materials 349kg cathode copper, 141kg zinc ingot, 5.4kg tin ingot, 0.67kg arsenic copper alloy (CuAs30), 1.1kg electrolytic nickel are used in a cored power frequency induction furnace (divided into copper melting furnace and holding furnace) according to a certain feeding sequence (copper+nickel→melting→adding tin+zinc→arsenic-copper alloy) sequentially add into the copper melting furnace to melt into molten copper alloy (melting temperature: 1090°C), and wait for the material to completely melt and reach a certain temperature (1100~1160°C), Move the copper alloy solution into the holding furnace (holding temperature: 1150-1170°C), add 1.8kg of manganese-copper alloy (CuMn30) to the above-mentioned copper alloy solution for deoxidation to obtain a low-oxygen copper alloy solution, and then in this low-oxygen copper alloy solution The copper-boron alloy (CuB5) that adds 2.8kg is made into the molten copper alloy liquid of the present invention, draws out the copp...

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PUM

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Abstract

The invention relates the seamless copper alloy pipe and preparing method used for corrosion resistant heat exchanger. The copper alloy comprises 0.002-0.02wt% boron, 0.1-0.6% nickel, 0.05-0.2% manganese, 69.0-71.0% copper, 0.8-1.3% tin, 0.03-0.06% arsenic, left zinc and impurity. The method comprises the following steps: adding raw material into brass-melting furnace to get copper alloy, shifting the copper alloy into holding furnace, adding the manganese copper alloy into copper alloy, adding copper boron alloy, making the melting copper alloy liquid, horizon continuous casting system driving copper alloy hollow strand, carrying out hot extrusion, tension and intermediate annealing, using the N2+H2 protective gas annealing furnace, and getting the product. The invention has the advantages of good corrosion resistance and simple technology.

Description

technical field [0001] The present invention relates to a seamless copper alloy tube mainly used for heat exchangers and a preparation method thereof, in particular to a seamless copper alloy tube which can be used in the production of condensers and heat exchangers with excellent corrosion resistance in electric power and other departments and its preparation method. Background technique: [0002] As electric power and other departments to make seamless copper alloy tubes for heat exchangers, the material usually used is HSn70-1 plus arsenic-tin brass tubes. Under the condition that the dissolved solids in the polluted water are greater than 1000 mg / liter, the corrosion resistance of the HSn70-1 arsenic-tin brass tube is significantly reduced, and in severe cases, it may cause a quality accident of cooling medium leakage. Polluted water quality conditions have higher requirements on the corrosion resistance of seamless copper alloy tubes for heat exchangers. In recent year...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/02F28F1/00
Inventor 赵敏杰胡汉全
Owner 江阴和宏精工科技有限公司
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