Aluminum alloy brazing sheet and brazing method

一种钎焊板、铝合金的技术，应用在焊接介质、焊接设备、金属加工等方向，能够解决添加量限制、耐腐蚀性不良影响、硬钎料表面的氧化覆膜破坏作用缺乏等问题，达到钎焊性提高、稳定钎焊性的效果

Inactive Publication Date: 2017-05-31
UACJ CORP
View PDF9 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the cladding material, the core material and the sacrificial anode material have their respective roles. When the amount of Mg added increases, the erosion caused by the molten brazing filler metal occurs excessively or adversely affects the corrosion resistance. In addition, Mg When the amount of addition is limited, the destructive effect of the oxide film on the surface of the brazing material is lacking
On the other hand, when it is desired to add Li, Be, Ba, and Ca to the core material and sacrificial anode material, the addition amount is further limited compared to Mg, so it is difficult to expect the effect of destroying the oxide film expected in the above proposal.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Aluminum alloy brazing sheet and brazing method
  • Aluminum alloy brazing sheet and brazing method
  • Aluminum alloy brazing sheet and brazing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The brazing material, core material, plate material, and sacrificial anode material having the compositions shown in Table 1 were respectively cast by continuous casting, and the obtained ingot was coated with a size of 163 mm in length, 163 mm in width, and 27 mm in thickness for the core material. . For the brazing filler metal, the obtained ingot was hot-rolled to a thickness of 3 mm, and cut into a size of 163 mm in length and 163 mm in width.

[0061] For the plate-shaped material, the obtained ingot was hot-rolled to a thickness of 3 mm, then cold-rolled to a thickness of 0.25 to 2 mm, and cut to a size of 163 mm in length and 163 mm in width. A part of the sheet material is prepared as a cut product of an ingot. For the sacrificial anode material, the obtained ingot was hot rolled to a thickness of 3 mm, then cold rolled to 1.5 mm, and cut into a size of 163 mm in length and 163 mm in width.

[0062] According to the conventional method, the prepared brazing ma...

Embodiment 2

[0078] The brazing material, the core material, the plate material, and the sacrificial anode material having the composition shown in Table 3 were respectively cast by continuous casting, and a soft clad plate material with a thickness of 0.4 mm was produced in the same manner as in Example 1, which was used as a test The material is pressurized into a cup shape, degreased with acetone only (no etching), or degreased with acetone, and then etched with a weak acid (with etching), and a 0.1mm-thick 3003 alloy that will be degreased is installed inside fins obtained by sheet forming, assembled into figure 1 The cup test piece shown. On the outside of the flared joint of the cup test piece ( figure 2 arrow part) coated with alcohol diluted flux (in the form of KF and AlF 3 Fluoride flux of the basic composition), in a nitrogen gas furnace, brazing heating was performed under the same conditions as in Example 1, and in the same manner as in Example 1, the brazing joint state o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The purpose of the invention of the present application is to provide an aluminum alloy brazing sheet able to achieve excellent brazing properties by effectively weakening an oxide film on a brazing surface. This aluminum alloy brazing sheet is obtained by cladding a brazing material, which contains 6-13% of Si, with the remainder consisting of Al and unavoidable impurities, on one or both surfaces of an aluminum alloy core material and is used to braze aluminum in an inert gas atmosphere or in a vacuum, wherein the aluminum alloy brazing sheet is characterized in that cladding is effected by interposing a plate-like material between the core material and the brazing material, the plate-like material containing one or more elements selected from among 0.05% or more of Li, 0.05% or more of Be, 0.05% or more of Ba, 0.05% or more of Ca and 0.4% or more of Mg, with the remainder consisting of Al and unavoidable impurities.

Description

technical field [0001] The present invention relates to an aluminum alloy brazing sheet for brazing aluminum in an inert gas atmosphere or in a vacuum and a brazing method using the aluminum alloy brazing sheet. Background technique [0002] Brazing joining is widely used as a joining method of aluminum products having a large number of thin joining parts, such as aluminum heat exchangers and machine parts. When brazing and joining aluminum (including aluminum alloys), it is necessary to destroy the oxide film covering the surface, and to contact the molten brazing filler metal with the base material or similarly melted brazing filler metal. In order to destroy the oxide film, Generally, there are a method of using flux and a method of heating in a vacuum, and both are put into practical use. [0003] Brazing joints can be applied in various fields, but the most representative application area is heat exchangers for automobiles. Most of the heat exchangers for automobiles ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/22B23K1/00B23K1/19B23K31/02B23K35/28C22C21/00B23K101/14B23K103/10
CPCB23K35/286B23K1/19B23K35/0233B23K35/0238B23K35/22B23K35/28B23K2101/14B23K2103/10B32B15/016C22C21/00C22C21/02F28F1/02F28F3/00F28F21/084F28F21/088F28F21/089
Inventor 伊藤泰永山吉知树
Owner UACJ CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap