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Thin brazing sheet fin component for high temperature brazing and method for manufacturing heat exchanger using the same

A heat exchanger and brazing plate technology, applied in heat exchange equipment, manufacturing tools, applications, etc., can solve the problems of changing the brazing arrangement direction, abnormal deformation of the end, deformation of the end, etc., to prevent the reduction of commodity value , The effect of preventing dumping and deformation

Inactive Publication Date: 2012-07-04
FURUKAWA SKY ALUMINUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, even in conventional brazing heating at a temperature of about 600°C, even a brazing sheet fin member, which should have excellent high-temperature buckling resistance, has abnormal deformation at the end.
[0017] Here, although it is also considered that the above-mentioned abnormal toppling deformation of the fin end 1A is due to the influence of gravity on the end 1A as the free end, the inventors of the present invention have found that even if the various parts of the core body are installed Because gravity does not act on the direction in which the front end side of the fin end 1A falls, the abnormal deformation of the end will also occur, that is, it is not only caused by gravity.
Therefore, it is considered that changing the arrangement direction during brazing only by assembling the core body cannot solve the problem.

Method used

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  • Thin brazing sheet fin component for high temperature brazing and method for manufacturing heat exchanger using the same
  • Thin brazing sheet fin component for high temperature brazing and method for manufacturing heat exchanger using the same
  • Thin brazing sheet fin component for high temperature brazing and method for manufacturing heat exchanger using the same

Examples

Experimental program
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Effect test

Embodiment 1

[0083] This Example 1 is equivalent to a preliminary research result, which is used to obtain conditions such as the Si content in the solder and the average coating ratio of one side of the brazing material necessary to prevent deformation of the fin end.

[0084] In Example 1, an Al-1.1mass%Mn-0.35mass%Si-0.4mass%Fe alloy was used as the core material, and a 70μm A thick brazing sheet fin member in which the Si content and coating ratio of an Al-Si alloy are variously changed. The content of Fe in the solder is in the range of 0.2 to 0.25 mass%, and in addition, in order to suppress the formation of coarse Si particles, about 0.003 mass% of Na is added during casting. Here, the core material and the solder are produced by normal DC casting, and in subsequent steps, the usual methods of cladding joining by hot rolling, cold rolling, and intermediate annealing are also used.

[0085] In order to investigate the deformation of the fin end, corrugated brazing plate fin parts wi...

Embodiment 2

[0090] In this Example 2, more conditions were changed variously.

[0091] First, the core material having the composition shown in Table 1 and the solder shown in Table 2 were respectively DC casted and homogenized by a conventional method. Here, in the casting of the solder, Si particle miniaturization treatment was performed by adding Na and Sr under predetermined conditions. The solder is hot-rolled to a predetermined thickness, laminated on the front and back surfaces of the surface-cut core material ingot, and further hot-rolled to perform cladding joining. Thereafter, cold rolling, intermediate annealing, and final cold rolling were performed to produce a clad member (brazing sheet fin member) having a predetermined thickness. Table 3 shows the material composition of the brazing sheet fin member as the covering member.

[0092] The cross-section in the thickness direction along the longitudinal direction of the fin member was observed with an optical microscope, and ...

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Abstract

The present invention provides a thin brazing sheet fin component for high temperature brazing and a method for manufacturing a heat exchanger using the same. According to the invention, the thin brazing sheet fin component with a thickness less than 85 mu m is used. Even the brazing is performed at a high temperature higher than 610 DEG C, the tilting deformation at the end of the fin is not caused. Al-Mn series alloy which is used as a core material is composed of the following components: 0.7-1.5% of Mn, 0.3-0.8% of Si, 0.05-0.75% of Fe, and the balance of Al substantially. The solder which is used for jointing with two surfaces of the core material is Al-Si series alloy with Si content of 5.5-8.0%. Furthermore the average coating rate of a single surface of the solder is 6.0-9.8%. Furthermore the relationship between the silicon content (Sif) in the solder and the average coating rate (CR) of a single surface of the solder is adjusted so that the following formula is satisfied: Q=Sif(mass%)*CR(%)<=67.

Description

technical field [0001] The present invention relates to a brazing plate fin member for an aluminum alloy heat exchanger and a method of manufacturing a heat exchanger using the same. More specifically, it relates to a fin member suitable for brazing at a high-temperature attainment temperature exceeding 610° C. to 622° C. as a corrugated fin member, and to a heat exchanger using the fin member. manufacturing method. Background technique [0002] Aluminum alloy heat exchangers are also suitable for jointing by furnace brazing using aluminum brazing sheets coated with solder (ろう材) due to their light weight and good thermal conductivity. Because it is used in mass production, it has been widely used, especially in automotive radiators, air-conditioning evaporators, capacitors, etc. [0003] In recent years, heat exchangers for automobiles have tended to be further reduced in weight. Therefore, there is an urgent need to reduce the thickness of various structural materials suc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F3/00F28F21/08C22C21/00B23P15/26
CPCB23K1/0012B23K1/008B23K35/286B23K2101/14B23K2103/10C22C21/00F28F21/084
Inventor 铃木义和鹿野浩大原伸昭
Owner FURUKAWA SKY ALUMINUM CORP
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