Method for brazing aluminium parts on the carbon steel part surface and aluminizing anti-rust on the non brazing surface

A non-brazing, parts technology, applied in welding media, sputtering, manufacturing tools, etc., can solve the problems of high manufacturing cost and high price of heat exchange tubes, and achieve the effect of reducing manufacturing costs

Active Publication Date: 2008-12-31
SHUANGLIANG ECO ENERGY SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of single-sided aluminum-plated metal materials, the manufacturing cost of heat exchange tubes is high

Method used

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  • Method for brazing aluminium parts on the carbon steel part surface and aluminizing anti-rust on the non brazing surface
  • Method for brazing aluminium parts on the carbon steel part surface and aluminizing anti-rust on the non brazing surface

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Embodiment Construction

[0009] The invention relates to a compound process method for brazing aluminum parts on the surface of carbon steel parts and performing aluminum plating on non-brazing surfaces to prevent rust. Its typical application occasions are air coolers, and the schematic diagram of the finned tube structure of the air cooler is attached figure 1 , 2 shown. In the manufacturing process of the heat exchange tube of the air cooler, the heat exchange tube is made of ordinary carbon steel large flat tube 1. After rolling and welding, the surface is not subjected to any method of aluminum dipping or aluminum plating process, and the surface is coated with A layer of composite brazing filler metal. After the composite brazing filler metal is dry, aluminum fins are assembled on the upper and lower outer surfaces of the large flat tube. The assembled parts are first put into a 200℃~250℃ drying furnace to dry the parts. Drying treatment, so that the composite solder flux is fully dried, and t...

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Abstract

The invention relates to the rust resistant method for aluminum coating of carbon steel part, aluminum soldering part and non aluminum soldering part, then installing aluminum part on the surface of the carbon steel part. Sending the assembled part into 200 deg.C-250deg.C drying oven, drying the compound soldering agent sufficiently, then taking into the controllable atmosphere oven for soldering and plating under the protection of the nitrogen, controlling the temperature within 570-615deg.C, soldering aluminum part on the surface of the carbon steel part, with the rest of the surface plated with aluminum, to finish the soldering and plating at one time, with the compound soldering material made of 30%-50% soldering material, 20%-40% soldering agent with the rest being ethandiol solution and the soldering material being Al. 85%-94%,Si: 15%-6%, the rest being microelement, the soldering material being aluminun fluoride 40-75%, and caesium fluoride 25-60%. It can be used to reduce the manufacturing cost.

Description

technical field [0001] The invention relates to a compound process method for brazing aluminum parts on the surface of carbon steel parts and performing aluminum plating on non-brazing surfaces to prevent rust. It belongs to the technical field of metal welding. Background technique [0002] Brazing aluminum parts on the surface of carbon steel parts and aluminizing anti-rust on non-brazed surfaces. The typical application is air coolers. The finned tubes of the air cooler are welded by large flat tube heat exchange tubes and aluminum fins. Its working principle is to transfer the heat of the medium inside the tube to the outside of the tube through the heat exchange tube and fins, and then the flowing air driven by the fan diffuses the heat into the atmosphere. The outer surface of the tube is usually aluminized, which has the characteristics of corrosion resistance and easy welding. At present, the heat exchange tubes of air coolers are generally formed by rolling weldi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P23/00B23P17/00B23K1/008B23K1/20B23K35/22B23K35/28C23C14/14C23C14/24
Inventor 吴小平朱宏清徐金礼
Owner SHUANGLIANG ECO ENERGY SYST CO LTD
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