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Indexed by:期刊论文

Date of Publication:2012-06-01

Journal:China Welding (English Edition)

Included Journals:EI、Scopus

Volume:21

Issue:2

Page Number:1-6

ISSN No.:10045341

Abstract:Vacuum brazing of TiAl alloy to 40Cr steel was carried out in a vacuum furnace using Ti 40Zr 10Cu 34.95 Ni 11.2Sn 3.85, Ti 51Zr 8.7Cu 24.5 Ni 11.8Sn 4 and pure copper foils, and the microstructure and microhardness of the resultant joints were investigated. The experimental results reveal that FeTi compounds formed in the brazing seam made with pure copper foil. However, the FeTi compounds were not detected when using Ti-Zr-Cu-Ni-Sn foils and the brazing seams were composed of two layers, one layer mixed Ti(Ni, Cu)Al and Ti-Al compounds, and the other mixed the filler metal matrix with Ti-Sn and Ti(Ni, Cu) compounds. The microhardness test results show that the brazing seams have higher microhardness values than the TiAl alloy and 40Cr steel base metals. Moreover, the microhardness in the brazing seam made with Ti 51Zr 8.7Cu 24.5 Ni 11.8Sn 4 is higher than those made with Ti 40Zr 10 Cu 34.95Ni 11.2Sn 3.85 and pure copper. ? Editorial Board of CHINA WELDING.