Microstructure and Brazing Characteristics of Brazing Sheets Fabricated by Vertical-type Tandem Twin-roll Casting
-
- Takayama Yusuke
- Graduate School of Science and Engineering, Tokyo Institute of Technology
-
- Yamano Kaho
- Department of Metallurgical Engineering, Tokyo Institute of Technology
-
- Narita Wataru
- UACJ Corporation Ltd.
-
- Nakamura Ryoji
- Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
-
- Tsutsui Akari
- Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
-
- Harada Yohei
- School of Materials and Chemical Technology, Department of Materials Science and Engineering, Tokyo Institute of Technology
-
- Muraishi Shinji
- School of Materials and Chemical Technology, Department of Materials Science and Engineering, Tokyo Institute of Technology
-
- Kurnai Shinji
- School of Materials and Chemical Technology, Department of Materials Science and Engineering, Tokyo Institute of Technology
Bibliographic Information
- Other Title
-
- タンデム式縦型高速双ロールキャスト法により作製した熱交換器材料の組織とろう付特性
- タンデムシキ タテガタ コウソクソウロールキャストホウ ニ ヨリ サクセイ シタ ネツコウカン キザイリョウ ノ ソシキ ト ロウズケ トクセイ
Search this article
Abstract
<p> Vertical-type tandem twin-roll casting is a highly effective method for thin clad strip fabrication. In addition, precipitation refinement and high solubility can be achieved by rapidly cooling the roll casting, so property improvement can also be expected. The aim of this study is to clarify the advantage of vertical-type tandem twin-roll casting by considering the property of brazing sheet fabricated by the present method. Six mm thick clad sheets consisting of 4045/3003/4045 were fabricated by both hot-roll bonding (HRB) and vertical-type tandem twin-roll casting (TRC). The clad sheets were cold-rolled to 0.17mm in thickness, subjected to intermediate annealing at several temperatures, cold-rolled to 0.10mm in thickness, and finally brazed at 600℃ for 3min. The microstructure and brazing characteristics of clad sheets were compared. After intermediate annealing, the HRB sheets fully recrystallized at 350℃. On the other hand, fibrous structures still remained in the TRC sheets at 400℃. Fine dispersoid particles with 0.1μm diameter were observed at all intermediate annealing conditions of HRB and 400 and 500℃ of TRC. The recrystallization behavior during brazing heat treatment was affected by each initial condition. In the HRB sheets, strain energy was dominant at no/250℃ intermediate annealing. In the TRC sheets, the precipitation behavior of super saturated Mn was the key factor regardless of the intermediate annealing condition. After the brazing heat treatment, TRC recrystallized grain was elongated in the rolling direction. This elongated grain reduced the grain boundary area vertical to the interface and erosion amount. From the sagging test, the TRC sheets showed higher sagging resistance than the HRB sheets. It was confirmed that the TRC process is more advantageous for brazing sheet fabrication although it is a simple process compared to HRB.</p>
Journal
-
- Journal of Japan Foundry Engineering Society
-
Journal of Japan Foundry Engineering Society 88 (10), 615-623, 2016
Japan Foundry Engineering Society
- Tweet
Details 詳細情報について
-
- CRID
- 1390001206510987264
-
- NII Article ID
- 130005529699
-
- NII Book ID
- AN10514770
-
- ISSN
- 21855374
- 13420429
-
- NDL BIB ID
- 027687730
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- CiNii Articles
-
- Abstract License Flag
- Disallowed