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Copper alloy for conditioner pipe

A technology for copper alloys and pipes, applied in the field of copper alloys for air-conditioning pipes, can solve the problems of not being able to better meet the comprehensive use requirements of the air-conditioning industry, reducing the service life of air conditioners, and breaking air-conditioning pipes, etc., to improve strength and restrain growth. , reducing the effect of hydrogen disease

Inactive Publication Date: 2006-02-08
ZHEJIANG HAILIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the manufacturing process of air-conditioning pipes, the following situations are prone to occur due to material problems: 1. The air-conditioning pipes are ruptured during assembly of the expansion pipes, resulting in the scrapping of the evaporator and condenser; and leakage; 3. When the air conditioner is in use, copper pipes produce pitting corrosion, which reduces the service life of the air conditioner
[0005] With the development of air-conditioning pipes in the direction of small diameter and thin wall, higher requirements are put forward for the strength and plastic corrosion resistance of the products. Problems such as leakage and pitting cannot better meet the comprehensive use requirements of the air-conditioning industry at the same time

Method used

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Experimental program
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Effect test

Embodiment 1

[0013] Embodiment 1: No. 1 alloy, the composition of each component is respectively by weight percent: copper (Cu) 99.9%, phosphorus (P) 0.015~0.040%, light rare earths such as lanthanum (La), cerium (Ce) Element-based misch metal (Re) 0.001-0.099%.

Embodiment 2

[0014] Embodiment 2: No. 2 alloy, the composition of each component is respectively by weight percent: copper (Cu) 99.9%, phosphorus (P) 0.004~0.012%, light rare earths such as lanthanum (La), cerium (Ce) Element-based misch metal (Re) 0.001-0.099%.

[0015] The preparation of the above alloy adopts a power frequency cored induction furnace. In the pure copper melt, according to the composition ratio and the order of feeding, add phosphorus-copper master alloy, rare earth-copper master alloy (or directly add lanthanum, cerium, etc. Light rare earth element-based mixed rare earth metals), cast into cylindrical copper alloy ingots.

[0016] Casting into a cylindrical copper alloy ingot, after sawing and interrupting, after subsequent processing such as hot working, cold working and corresponding heat treatment, it is made into copper pipes for air conditioning and refrigeration.

[0017] state

[0018] outer diameter, mm

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PUM

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Abstract

Disclosed is a copper alloy for air-conditioner pipes, which comprises the following components (by weight percentage): Cu 99.9%, P 0.001-0.099%, 0.001-0.099% of mixed rare earth metal (Re) mainly including lightweight rare-earth elements such as La and Ce. The content of P is preferably 0.015-0.040% and 0.004-0.012%. The invention can improve the metal's corrosion resistance and increase the operating life for the air-conditioner pipes.

Description

technical field [0001] The patent of the invention relates to a copper alloy for air-conditioning pipes, which belongs to material alloying and material anticorrosion [0002] technology field. technical background [0003] Copper tubes for air-conditioning and refrigeration (referred to as air-conditioning tubes) are tubes specially used for heat exchangers in air conditioners and refrigeration systems. Wait. [0004] The material of existing air-conditioning and refrigeration copper pipes (abbreviated as air-conditioning pipes) is phosphorus deoxidized copper, which includes two grades TP1 and TP2, and the composition of each component is respectively by weight percentage: TP1 is Cu≥99.90%, P0.004 ~0.012%; TP2 is Cu≥99.9%, P0.015~0.040%. Although the two grades of phosphorus deoxidized copper have good toughness, welding performance and certain strength, density and corrosion resistance. However, in the manufacturing process of air-conditioning pipe...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/03
Inventor 曹建国冯亚丽冯海良郭均华赵学龙
Owner ZHEJIANG HAILIANG
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