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Copper alloy sheet for plate heat exchanger and manufacturing method thereof

A technology of a plate heat exchanger and a manufacturing method, which is applied in the field of alloy processing, can solve problems such as inability to perform heat treatment, low chemical activity, and long processing cycle, and achieve the effects of reducing energy, promoting stability, and prolonging service life

Active Publication Date: 2018-06-01
ANHUI PROPELLENT HEAT TRANSFER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to ensure the geometric accuracy of the plate and sufficient anti-deformation ability, heat treatment cannot be performed after cold pressing to eliminate internal stress; methods such as ultrasonic waves to eliminate stress are impossible to use in plate heat exchangers due to their high price and long processing cycle. It is applied in the processing of corrugated sheets; therefore, there are different degrees of internal stress caused by cold working and pressing in the corrugated sheets, especially in areas with large deformation.
[0004] Compared with stainless steel plate heat exchangers, plate heat exchangers using copper alloys have a higher heat transfer coefficient and better pressing performance. However, although the copper alloy sheets currently used have low chemical activity, they are applied to plate heat exchangers. , at Cl - Under the long-term attack of hydride, the same corrosion will occur

Method used

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  • Copper alloy sheet for plate heat exchanger and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A copper alloy sheet for a plate heat exchanger, the copper alloy sheet is made of the following components: Zn 33%, C 0.25%, Sn 0.5%, Al 0.5%, Bi 0.03%, Fe 0.5%, V 0.05%, Mo 0.5%, Zr 0.03%, Y 0.45%, and the rest are Cu and other unavoidable impurities.

[0022] The manufacture method of above-mentioned copper alloy sheet comprises the following steps:

[0023] (1) Melting: first add raw materials Cu, Zn and C into the melting furnace, heat to 1150°C to obtain a molten liquid, add raw materials Sn, Bi, Fe, V, Mo, Zr and Y to the molten liquid, and stir evenly , heated until all the raw materials in the melting furnace are melted, and finally add the easy-to-oxidize raw material Al and stir evenly; (2) Casting: the cooling rate after casting is 50°C / s; (3) Rough rolling: improve the casting structure, refine Precipitates in the casting process; (4) the first annealing: the annealing temperature is 690°C, and the holding time is 6.5h; (5) intermediate rolling: the interm...

Embodiment 2

[0025] A copper alloy sheet for a plate heat exchanger, the copper alloy sheet is made of the following components: Zn 35%, C 0.30%, Sn 0.9%, Al 0.85%, Bi 0.05%, Fe 0.5%, V 0.1%, Mo 0.6%, Zr 0.03%, Y 0.55%, and the rest are Cu and other unavoidable impurities.

[0026] The manufacture method of above-mentioned copper alloy sheet comprises the following steps:

[0027] (1) Melting: first add raw materials Cu, Zn and C to the melting furnace, heat to 1100°C to obtain a molten liquid, add raw materials Sn, Bi, Fe, V, Mo, Zr and Y to the molten liquid, and stir evenly , heated until all the raw materials in the melting furnace are melted, and finally add the easy-to-oxidize raw material Al and stir evenly; (2) Casting: the cooling rate after casting is 60°C / s; (3) Rough rolling: improve the casting structure, refine Precipitates in the casting process; (4) the first annealing: the annealing temperature is 700°C, and the holding time is 6.5h; (5) intermediate rolling: the intermed...

Embodiment 3

[0029] A copper alloy sheet for a plate heat exchanger, the copper alloy sheet is made of the following components: Zn 34%, C 0.35%, Sn 0.55%, Al 0.85%, Bi 0.04%, Fe 0.6%, V 0.08%, Mo 0.7%, Zr 0.05%, Y 0.55%, and the rest are Cu and other unavoidable impurities.

[0030] The manufacture method of above-mentioned copper alloy sheet comprises the following steps:

[0031] (1) Melting: first add raw materials Cu, Zn and C into the melting furnace, heat to 1050°C to obtain a molten liquid, add raw materials Sn, Bi, Fe, V, Mo, Zr and Y to the molten liquid, and stir evenly , heated until all the raw materials in the melting furnace are melted, and finally add the easy-to-oxidize raw material Al and stir evenly; (2) Casting: the cooling rate after casting is 80°C / s; (3) Rough rolling: improve the casting structure, refine Precipitates in the casting process; (4) the first annealing: the annealing temperature is 650°C, and the holding time is 6.5h; (5) intermediate rolling: the roll...

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Abstract

The invention relates to the field of alloy processing, and specifically relates to a copper alloy sheet for a plate-type heat exchanger and a manufacture method of the copper alloy sheet. The copper alloy sheet comprises the following components, by weight percentage, 33-35% of Zn, 0.25-0.5% of C, 0.5-1.0% of Sn, 0.5-1.0% of Al, 0.03-0.05% of Bi, 0.5-0.8% of Fe, 0.05-0.15% of V, 0.5-0.8% of Mo, 0.03-0.05% of Zr, and 0.45-0.65% of Y, with the balance being Cu and other inevitable impurities. The manufacture method includes casting, rolling, annealing, and so on. The produced copper alloy sheet is high in tensile strength, not prone to deform, excellent in elongation percentage and hardness and good in wear resistance. Through cooperation with multiple structures, the activity of the alloy is passivated, ions such as Cl<-> in a fluid cannot crowd into a crystal interlayer structure, so that the produced copper alloy sheet is excellent in corrosion resistance. The copper alloy sheet can be applied to a plate-type heat exchanger and can effectively resist corrosion by a Cl<->-containing aqueous solution, so that the service life of the plate-type heat exchanger is prolonged.

Description

technical field [0001] The invention relates to the field of alloy processing, in particular to a copper alloy sheet for a plate heat exchanger and a manufacturing method thereof. Background technique [0002] Heat exchangers are general-purpose equipment widely used in chemical, pharmaceutical, metallurgical and refrigeration industries. The structure of the plate heat exchanger is especially suitable for liquid-liquid heat transfer under turbulent flow conditions, and is an ideal choice for central heating, refrigeration and air conditioning, and heat exchange for domestic water. Stainless steel and titanium plates play a dominant role in the material selection of plate heat exchangers, and the cold medium water source contains Mg to a certain extent 2+ , Ca 2+ And other substances that are easy to scale, when using cheap chloride to remove the substances that are easy to scale, there must be a surplus of Cl in the water medium - , stainless steel is difficult to overco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/02C22F1/08
CPCC22C1/02C22C9/04C22F1/08
Inventor 张凌霞刘红军胡西芹
Owner ANHUI PROPELLENT HEAT TRANSFER TECH CO LTD