Composite aluminum belt for air cooling of power station and manufacturing method thereof

A manufacturing method, a composite aluminum technology, applied in the field of aluminum foil calendering manufacturing, can solve the problems of uneven composite rate, large equipment investment, long production process, etc., and achieve the effect of short process flow, less investment capital and high production efficiency

Active Publication Date: 2020-06-19
JIANGSU DINGSHENG NEW MATERIAL JOINT STOCK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional method of manufacturing composite aluminum strips for power station air cooling is produced by melting-casting-sawing-milling-heating-hot-rolling-composite matching-hot-rolling and compounding and subsequent processing methods. This method has the advantages of large equipment investment, long production process, and energy efficiency. Disadvantages such as high consumption, low yield, uneven compounding rate, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. According to the proportion of Si 0.20%, Fe 0.50%, Cu 0.15%, Mn 1.1%, Ti 0.03%, and the balance is Al as the basic composition, the alloy raw materials are prepared and the core layer billet is smelted and cast-rolled to obtain a 7.0mm casting Rolled coil, namely alloy "3003";

[0031] According to the proportion by weight of Si 9.5%, Fe 0.20%, Ti 0.02%, and the balance is Al as the basic component, the alloy raw material is prepared for composite layer billet smelting and casting to obtain a 6.8mm cast-rolled coil, that is, the alloy "4045";

[0032] 2. Core layer preparation: 3003 cast-rolled coils are rough-rolled at 7.0-5.4-4.0 to a thickness of 4.0mm for intermediate annealing: heat up to 240°C for 2h and hold for 3h, continue to heat up to 520°C for 3h and cool out of the furnace. Width 1280mm;

[0033] 3. Composite layer preparation: According to the design of composite rate of 15±2%, billet annealing is carried out on 4045 cast-rolled coils: 18h to 500°C, he...

Embodiment 2

[0041] 1. According to the percentage by weight, Si 0.10%, Fe 0.60%, Cu 0.05%, Mn 1.2%, Zn 0.05%, the balance is Al as the basic composition, the alloy raw material is prepared, the core layer billet is smelted and cast-rolled to obtain a 7.0mm casting Rolled coil, namely alloy "3003";

[0042] According to the percentage by weight, Si 9.0%, Fe 0.25%, Cu 0.1%, Mn 0.1%, and the balance is Al as the basic component, and the alloy raw material is prepared for composite layer billet smelting and casting to obtain a 6.8mm cast-rolled coil, that is, the alloy " 4045";

[0043] Other steps are the same as described in Example 1.

Embodiment 3

[0045] 1. According to the proportion of Si 0.30%, Fe 0.30%, Cu 0.25%, Mn 1.0%, Zn 0.1%, Ti 0.01%, and the balance is Al as the basic composition, the alloy raw material is prepared for core layer billet smelting, casting and rolling Obtain 7.0mm cast and rolled coils, that is, alloy "3003";

[0046] 11% Si by weight, 0.05% Fe, 0.05% Cu, 0.04% Mn, 0.05% Ti, and the rest is Al as the basic composition, prepare alloy raw materials for composite layer billet smelting and casting to obtain 6.8mm cast-rolled coils , namely alloy "4045";

[0047] Other steps are the same as described in Example 1.

[0048] Performance tests were performed on the finished fin materials produced in Example 2 and Example 3 respectively, and their tensile strength and elongation were equivalent to those of traditional hot-rolled materials to produce composite aluminum strips. There is no abnormality in use, and there are no abnormal phenomena such as lodging after welding, unfulfilled solder joints, a...

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Abstract

The invention discloses a composite aluminum belt for air cooling of a power station. The composite aluminum belt is of a composite structure formed by a core layer and a single-face composite layer thereof. The composite aluminum belt is an important component of an air cooling direct-cooling system pipe fin type heat exchanger of the power station. The composite layer and the core layer are prepared by utilizing a cast rolling and cold rolling production manner, and by means of cold rolling compositing, two layers of metal are combined together closely. The invention further discloses a manufacturing method of the composite aluminum belt for air cooling of the power station. The technological process of the method comprises the steps of smelting, cast rolling, rough rolling, homogenizingannealing, cold rolling compositing, rough rolling and edge cutting, finish rolling, finished product annealing, slitting, checking and packaging. Compared with a material produced through a traditional hot rolling method, indexes such as strength obtained before and after brazing, the welding spot quality, the shaving razor blowing pressure and the upright degree after welding are equivalent, however, the technologic process is short, energy consumption is low, the production efficiency is high, the composite rate in the plate and strip material width direction is uniform, the yield is high,the cost input is low, the risk is low, and formation of intermetallic brittleness compounds can be avoided.

Description

technical field [0001] The invention relates to a composite aluminum strip for power station air cooling produced by a casting-rolling+cold-rolling composite method and a manufacturing method thereof, and belongs to the technical field of aluminum foil calendering manufacturing. Background technique [0002] The traditional method of manufacturing composite aluminum strips for power station air cooling is produced by melting-casting-sawing-milling-heating-hot-rolling-composite matching-hot-rolling and compounding and subsequent processing methods. This method has the advantages of large equipment investment, long production process, and energy efficiency. Disadvantages such as high consumption, low yield, and uneven compounding rate. Contents of the invention [0003] Aiming at the shortcomings of the traditional hot rolling production method of the composite aluminum strip for power station air cooling, the purpose of the present invention is to provide an alternative com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/02C22F1/04C22F1/043B21B15/00B21B3/00B21B1/22
CPCB21B1/22B21B3/00B21B15/0007B21B2001/221B21B2003/001B21B2015/0021B21B2261/04C22C21/00C22C21/02C22F1/04C22F1/043
Inventor 刘前换易亦为田国建史明飞胡刘飞任素贞
Owner JIANGSU DINGSHENG NEW MATERIAL JOINT STOCK CO LTD
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