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Process control technology for vacuum brazing aluminum alloy composite board belt foil

A composite strip and control technology, which is applied in metal rolling and other directions, can solve problems such as cracking and leaking points, and achieve the effects of firm welds, increased fluidity, increased fluidity and diffused flow

Inactive Publication Date: 2008-09-24
无锡冠云铝业有限公司 +1
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AI Technical Summary

Problems solved by technology

Meet and adapt to the new requirements and standards put forward by the heat exchanger manufacturing industry, and solve the problems of leaks and cracks in the vacuum brazing process of aluminum heat exchangers

Method used

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Embodiment Construction

[0018] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with specific embodiments.

[0019] When the aluminum alloy is smelted, various metals or additives are added in sequence according to the chemical composition requirements of the ingot, including the aluminum-bismuth master alloy with a bismuth content of 3%. All the components of the ingot are controlled within the range required by the standard, and the bismuth content is controlled between 0.05-0.15%. The above-mentioned smelting process is the prior art; when rolling the brazed composite layer slabs, they are made into 40, 50, 60mm thickness respectively, compounded on the core material of 265, 265, 240mm, and the cladding rate is 12% after rolling. , 14%, 16% composite strips. The rolling process is the same as the existing process, and will not be repeated here.

[0020] Bismuth ...

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Abstract

The invention discloses a processing control technology of vacuum brazing aluminum alloy composite plate strip and foil. During melting the aluminum alloy, various metal or additive including Aluminum-Bismith master alloy with the Bismith content of 3 percent are added successively according to the chemical components requirement of ingot, and the Bismith content is controlled at 0.05 to 0.15 percent for controlling the whole components of ingot at the standard requirement scope; when rolling the brazing composite plate blank, the Aluminum-Bismith master alloy is fabricated into the thickness of 40, 50 and 60 milimeter and combined on a core material of 265, 265 and 240 milimeter, and the composite plate strips of the clad ratio of 12, 14 and 16 percent are obtained after rolling. By adopting a solder layer with new chemical composition, the invention controls the different clad ratio according to different thickness of material, thereby meeting and adapting the new requirement and new standard from the manufacture industry of heat exchanger, thus solving the leakage and cracking problem occurred in the vacuum brazing process of the aluminum heat exchanger.

Description

technical field [0001] The invention belongs to the field of foil materials for heat exchanger composite plates, and in particular relates to a process control technology for vacuum brazing aluminum alloy composite plates and foils. Background technique [0002] Heat exchangers are widely used in construction machinery, compressors, automobiles, air conditioners, oxygen generators and other industries. Aluminum materials have been developed in recent years to replace the original copper materials. Its main production process is brazing The welding process is to use a single-component aluminum alloy fin as a partition with a composite aluminum alloy sheet, and braze it into a channel for water, oil or air, so as to reduce the temperature. Vacuum brazing is one of the important and common process methods. In the 1980s, my country introduced, absorbed and digested the processing technology of aluminum alloy composite plate strip foil for brazing from abroad, and provided a lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03B21B1/22
Inventor 管保清范建亚余瑞平
Owner 无锡冠云铝业有限公司
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