Open AccessStudy on the microstructure of air reactive brazing joint between Al2O3 ceramic and Q235 steel
Author(s) -
Tianpeng Wang,
Mingcheng Sun,
Hongqiang Li,
Shaoyang Xiao,
Yunan Wang,
Xueyuan Nie
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2125/1/012071
Subject(s) - brazing , feal , materials science , microstructure , ceramic , metallurgy , oxide , filler metal , joint (building) , welding , intermetallic , alloy , architectural engineering , arc welding , engineering
Q235 steel /Al 2 O 3 ceramics were brazed with Ag-CuO filler metal at 1050°C and held for 15min in air. When brazing Q235 steel and Al 2 O 3 ceramics directly, it was found that serious oxidation occurred on the steel side during the brazing process. Although the joining was realized, a loose oxide film was formed on the surface of the base steel, which affected the mechanical properties of joints. When Q235 steel with aluminized surface was adopted to braze with Al 2 O 3 ceramics, a Al 2 O 3 layer formed on the surface of Q235 steel successfully avoided the oxidation of Q235 steel, and a compact and defection-free joint was obtained. The typical organization of joint was Al 2 O 3 / CuAl 2 O 4 / CuO/ Ag/ CuO/ CuAl 2 O 4 /Al 2 O 3 / FeAl/ FeAl 2 / Fe.