CN1730691A

CN1730691A - Copper alloy for conditioner pipe

Info

Publication number: CN1730691A
Application number: CN 200510060388
Authority: CN
Inventors: 曹建国; 冯亚丽; 冯海良; 郭均华; 赵学龙
Original assignee: Zhejiang Hailiang Co Ltd
Current assignee: Zhejiang Hailiang Co Ltd
Priority date: 2005-08-15
Filing date: 2005-08-15
Publication date: 2006-02-08
Anticipated expiration: 2025-08-15
Also published as: CN100338245C

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

Copper alloy for conditioner pipe

Technical field

Patent of the present invention relates to a kind of copper alloy for conditioner pipe, belongs to material alloysization and material antiseptic

Technical field.

Technical background

Air-conditioning refrigerating copper pipe (being called for short the air-conditioning pipe) is the tubing that is specifically designed to conditioner and refrigeration system heat exchanger, and this tubing comprises smooth pipe and the tubing that has different surfaces externally and internally shapes, as rifled tube, finned tube etc.

The material of existing air-conditioning refrigerating copper pipe (being called for short the air-conditioning pipe) is a phosphorized copper, and it comprises two trade mark TP1, 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%.Though the phosphorized copper of these two trades mark has toughness, welding property and certain intensity, density, solidity to corrosion preferably.But because of problem of materials following situation takes place easily in the manufacturing processed of air-conditioning pipe: 1, the air-conditioning pipe produces to break when assembling rises by pipe and causes scrapping of vaporizer and condenser; 2, the weld mistake phosphorus generation when welding of air-conditioning pipe is broken and is leaked; 3, air-conditioning copper pipe generation spot corrosion in use reduces the work-ing life of conditioner.

Along with the air-conditioning pipe develops to direction small-bore, thin-walled, intensity, plasticity corrosion stability to product are also had higher requirement, and the existing air-conditioning pipe made from the phosphorized copper material in the air-conditioning manufacturing owing to the comprehensive service requirements of breaking, problems such as leakage, spot corrosion can't satisfy air-conditioning industry better simultaneously.

Summary of the invention

The purpose of this invention is to provide a kind of higher-strength that has, the copper alloy for conditioner pipe of density and corrosion resistance nature.

The present invention is a copper alloy for conditioner pipe, include copper (Cu), phosphorus (P) etc., it is characterized in that also comprising simultaneously norium (Re) based on lanthanum (La), cerium lightweight rare earth elements such as (Ce), the composition of each component is respectively by weight percentage: copper (Cu) 99.9%, phosphorus (P) 0.001～0.099% is based on the norium (Re) 0.001～0.099% of lanthanum (La), cerium lightweight rare earth elements such as (Ce).

The composition of described each component can be preferably copper (Cu) 99.90% respectively by weight percentage, and phosphorus (P) 0.015～0.040% is based on the norium (Re) 0.001～0.099% of lanthanum (La), cerium lightweight rare earth elements such as (Ce).

The composition of described each component also can be preferably copper (Cu) 99.90% respectively by weight percentage, and phosphorus (P) 0.004～0.012% is based on the norium (Re) 0.001～0.099% of lanthanum (La), cerium lightweight rare earth elements such as (Ce).

Described phosphorus can phosphorus-copper master alloy mode add in the copper.

The present invention passes through to add a small amount of or trace rare-earth metallic element on the basis of existing phosphorized copper air-conditioning tube material, can be in metal founding crystallisation process and in the later recrystallization process, impel the increase forming core, and suppressed growing up of crystal grain, refinement crystal grain, strengthened crystal boundary.Thereby when not reducing material plasticity, improved the intensity of material.Rare earth metal has strong desoxydatoin again simultaneously, after adding rare earth, can further reduce in the material because of the residual oxygen of the segregation of phosphorus, reduced metal and the nonmetal oxide in the material, hydrogen disease when reducing the material welding, the work-ing life of having improved the corrosion resistance nature and the air-conditioning pipe of metal.

Copper alloy for conditioner pipe of the present invention also can be used for water pipe, all gases transport pipe and other liquid conducting pipes copper pipe material.

Embodiment

Embodiment 1:1 alloy, the composition of each component is respectively by weight percentage: copper (Cu) 99.9%, phosphorus (P) 0.015～0.040% is based on the norium (Re) 0.001～0.099% of lanthanum (La), cerium lightweight rare earth elements such as (Ce).

Embodiment 2:2 alloy, the composition of each component is respectively by weight percentage: copper (Cu) 99.9%, phosphorus (P) 0.004～0.012% is based on the norium (Re) 0.001～0.099% of lanthanum (La), cerium lightweight rare earth elements such as (Ce).

Frequency cored induction furnace is adopted in the preparation of above-mentioned alloy, in the fine copper melt, by composition proportion and order of addition(of ingredients), add phosphorus-copper master alloy, rare earth-copper master alloy (also can directly add norium) successively, be cast into the cylindrical, copper alloy pig based on lightweight rare earth elements such as lanthanum, ceriums.

Be cast in the sawing of cylindrical, copper alloy pig and have no progeny, through making air-conditioning and cooling copper pipe after the following process such as hot-work, cold working and corresponding thermal treatment.

Material is made the mechanical property behind the copper pipe, sees the following form:

State	Tensile strength sigma _b	Elongation δ ₅
State	Tensile strength sigma _b	Elongation δ ₅	Soft	≥220	≥45
Light and soft	≥220	≥45	Soft	≥220	≥45

Material is made the enlarging rate of copper pipe, sees the following form:

External diameter, mm	State	Enlarging rate (dashing 60 ° of awls), %	The result
External diameter, mm	State	Enlarging rate (dashing 60 ° of awls), %	The result	≤19	Soft	45	Sample should not produce macroscopic crackle and breach
＞19	35			≤19		45

Claims

1, a kind of copper alloy for conditioner pipe, include copper, phosphorus, it is characterized in that also comprising simultaneously norium based on lanthanum, cerium lightweight rare earth element, the composition of each component is respectively by weight percentage: copper 99.9%, phosphorus 0.001～0.099% is based on the norium 0.001～0.099% of lanthanum, cerium lightweight rare earth element.

2, by the described copper alloy for conditioner pipe of claim 1, the composition that it is characterized in that described each component is respectively copper 99.90% by weight percentage, phosphorus 0.015～0.040% is based on the norium 0.001～0.099% of lanthanum, cerium lightweight rare earth element.

3, by the described copper alloy for conditioner pipe of claim 1, the composition that it is characterized in that described each component is respectively copper 99.90% by weight percentage, phosphorus 0.004～0.012% is based on the norium 0.001～0.099% of lanthanum, cerium lightweight rare earth element.

4, by the described copper alloy for conditioner pipe of claim 1,2 or 3, it is characterized in that described phosphorus adds in the copper in the mode of phosphorus-copper master alloy.