Novel copper alloy and copper alloy pipe

A copper alloy, mixed rare earth technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems of reduced strength, increased cracking, local grain growth, etc. Corrosion performance, effect of grain refinement

Inactive Publication Date: 2011-05-25
GOLDEN DRAGON PRECISE COPPER TUBE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, in the process of making air-conditioning heat exchangers, the copper alloy tubes for refrigeration need to undergo three processes of bending, expanding and flaring, and the hairpin tubes made of copper alloy tubes for r

Method used

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  • Novel copper alloy and copper alloy pipe
  • Novel copper alloy and copper alloy pipe
  • Novel copper alloy and copper alloy pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 smooth copper alloy tube

[0031] The raw materials for the preparation of the copper alloy tube used in the embodiment of the present invention are electrolytic copper plate, pure Sn, phosphor copper CuP14 and B, and the preparation process is the commonly used electromagnetic stirring horizontal continuous casting, three-roll planetary rolling, combined drawing, Disc stretching, annealing and other processes.

[0032] The metal composition of the copper alloy tube is shown in Table 1, containing: Sn: 0.15 to 0.95% by mass, P: 0.01 to 0.06% by mass, B: 0.001 to 0.01% by mass, and the balance is copper and unavoidable impurities. It is less than 0.06% by mass, and the radial grain size is 0.01-0.03mm. The copper alloy may further contain misch metal: 0.001 to 0.05% by mass.

[0033] The specific operation is as follows: put the graphite sheet into the bottom of the cored induction furnace, then add the electrolytic copper plate, use low-power heating to r...

Embodiment 2

[0053] Embodiment 2 semi-hard copper alloy tube

[0054] The processing technology of the semi-hard copper alloy tube in this embodiment is basically the same as that of the above-mentioned smooth copper alloy tube. However, in order to make the size of the semi-hard copper alloy tube and the smooth copper alloy tube consistent, the specification of the copper coil tube made by repeated stretching is 6.03×0.5mm, and then empty-draw the annealed copper coil through the forging die at a processing rate of 5%, and draw it to a specification of 6×0.5mm semi-hard copper alloy tube.

[0055] This example The properties of the 6×0.5 mm semi-hard copper alloy tube are shown in Table 4, and the following Table 5 shows the properties of the semi-hard copper alloy tube heated to 850° C.×15 s.

[0056] The performance of table 4 semi-hard copper alloy pipe

[0057]

[0058] Note: ○ indicates that the copper alloy has excellent corrosion resistance or process performance; × indic...

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PUM

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Abstract

The invention provides copper alloy with excellent tensile strength and a copper alloy pipe prepared from the copper alloy. The copper alloy comprises 0.15 to 0.95 mass percent of Sn, 0.01 to 0.060 mass percent of P, 0.001 to 0.01 mass percent of B and the balance of copper and other impurities, wherein the impurity content is less than 0.06 mass percent. The longitudinal tensile strength sigmab of the annealed copper alloy pipe is more than or equal to 250 N/mm<2>, the radial average grain is less than or equal to 0.035 millimeter, and a yield ratio of the yield (limit) strength sigma 0.2 of a longitudinal tensile test to sigma b is less than or equal to 0.27. Compared with the copper alloy pipe made of phosphorus deoxidized copper, the tensile strength is improved, grains are refined, the yield strength is not changed obviously, and the corrosion resistance and heat resistance are excellent.

Description

technical field [0001] The invention relates to a copper-based alloy, in particular to a high-strength copper alloy and a copper alloy tube prepared from the copper alloy. Background technique [0002] Usually, phosphorus deoxidized copper (TP2) is mostly used in heat exchangers (evaporators, condensers), connecting pipes (for indoor and outdoor connection) and various copper alloy pipes for refrigeration and air conditioning, because phosphorus deoxidized copper has good thermal conductivity. , and good plasticity, easy processing and welding. [0003] At present, in the air-conditioning refrigerant market, most developing countries use HCFC (hydrochlorofluorocarbon) Freon. Taking this series of R22 as an example, the maximum working pressure of the pipeline is 1.5MPa, and R22 has a relatively large damage coefficient to the earth's atmospheric ozone layer. . However, some developed countries such as Europe, America, and Japan have begun to fully use HFC-based freon with ...

Claims

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Application Information

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IPC IPC(8): C22C9/02C22F1/08F16L9/02
Inventor 冯振国赵金浩李新奎唐永立熊双奎鲁长健
Owner GOLDEN DRAGON PRECISE COPPER TUBE GROUP
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