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Copper alloy tube for heat exchange

A technology of heat exchangers and copper alloys, applied in the field of copper alloy tubes for heat exchangers, can solve the problems of high product prices and disadvantages, and achieve the effects of increased extrusion pressure, improved processability, and high strength

Inactive Publication Date: 2012-09-26
HITACHI CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the wall thickness becomes thicker, the amount of copper used will increase, so the price of the product will increase with the increase in copper prices in recent years, and it is also disadvantageous from the viewpoint of saving copper materials as resources.

Method used

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  • Copper alloy tube for heat exchange
  • Copper alloy tube for heat exchange
  • Copper alloy tube for heat exchange

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0052] The copper alloy tube for a heat exchanger according to the first embodiment of the present invention contains 0.1-1.0% by mass of Mn, 0.05-0.5% by mass of Fe, and 0.01-0.1% by mass of P. The mass ratio of Fe to P (Fe The copper alloy whose / P) is 2-8 and the remainder is Cu and inevitable impurities is formed into a tube shape.

[0053] A copper alloy containing 0.1 to 1.0% by mass of Mn is used as a material. Mn exists in copper in a solid solution state and is a component that contributes to the improvement of strength. In addition, by coexisting with P, a part is converted into a P compound and precipitated, so it is a component that can also expect a precipitation strengthening effect.

[0054] In addition to the prescribed amounts of Mn, Fe, and P, the mass ratio (Fe / P) is in the range of 2 to 8 containing 0.05 to 0.5 mass% of Fe and 0.01 to 0.1 mass% of P. Fe is added together with P and precipitates in the material as a P compound. Therefore, Fe is added for the pu...

no. 2 Embodiment approach

[0061] The copper alloy tube for a heat exchanger according to the second embodiment of the present invention uses copper to which a predetermined amount of one or both of Ni and Co is added to the composition of the copper alloy of the first embodiment. Alloy tube.

[0062] That is, the copper alloy tube for heat exchanger of this embodiment contains 0.1 to 1.0 mass% of Mn, 0.05 to 0.5 mass% of Fe, and 0.01 to 0.1 mass% of P, and contains a total of 0.01 to 0.25 mass% of Ni. With one or two of Co, the mass ratio of the total of Fe, Ni, Co to P {(Fe+Ni+Co) / P} is 2-8, and the remainder is copper with Cu and unavoidable impurities The alloy is formed into a tube.

[0063] Next, the reason for the numerical limitation of the components of the copper alloy described above will be explained below. In addition, since the reason for limiting the addition amount of Mn, P, and Fe and the mass ratio of Fe to P is the same as in the first embodiment, the description thereof is omitted here....

no. 3 Embodiment approach

[0069] The copper alloy tube for a heat exchanger according to the third embodiment of the present invention uses one or more selected from Sn, Zn, In, and Mg with a predetermined amount added to the composition of the copper alloy of the first embodiment The composition of the copper alloy copper alloy tube.

[0070] That is, the copper alloy tube for a heat exchanger of the present embodiment contains 0.1 to 1.0% by mass of Mn, 0.05 to 0.5% by mass of Fe, and 0.01 to 0.1% by mass of P, and contains 0.01 to 0.3% by mass in total. One or more components selected from Sn, Zn, In, and Mg, the mass ratio of Fe to P (Fe / P) is 2-8, and the remainder is a copper alloy with Cu and unavoidable impurities formed into a tube and to make.

[0071] Next, the reason for the numerical limitation of the components of the copper alloy described above will be explained below. In addition, since the reasons for limiting the addition amounts of Mn, P, and Fe and the mass ratio of Fe to P are the sa...

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Abstract

The invention provides a copper alloy tube used for heat exchange. The advantage of high strength of the copper alloy tube is maintained, and simultaneously, the process performance is enhanced, and the production performance is enhanced by inhibitaing the pressure increase in heat extrusion. The copper alloy tube used for heat exchange is formed by tubular copper alloy, wherein the contents are provided as following: 0.1 to 1.0 mas% of Mn, 0.05 to 0.5 mas% of Fe and 0.01 to 0.1 mas% of P, with the remaining being Cu and unavoided impurity, and the mass ratio of Fe to P is about 2 to 8.

Description

Technical field [0001] The present invention relates to copper alloy tubes for heat exchangers used in air conditioners such as box-type air conditioners or heat exchangers of heat pump water heaters or their piping, and particularly relates to heat exchanges with excellent strength and excellent workability such as hot extrusion Copper alloy tube for appliance. Background technique [0002] Copper tubes used in heat exchangers require high strength, good workability, excellent corrosion resistance, good thermal conductivity, good brazing properties, and high fatigue strength. As a material that meets these actual use conditions, it is generally used Phosphorus deoxidized copper. [0003] On the other hand, in response to the problem of global warming, the conversion of alternative Freon and CO 2 The spread of heat pump water heaters as refrigerants. For such a new refrigerant, the condensation pressure during operation becomes higher than before. Therefore, in order to obtain su...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C9/05F28F21/08F28F1/00
Inventor 山本佳纪萩原登堀口贤
Owner HITACHI CABLE
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