Open AccessThe Effect of Cr2O3+Al Addition on the Microstructure of Combustion Electrode Joint
Author(s) -
Chao Shen,
Zhizun Li,
Li Sun,
Han Feng
Publication year - 2020
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 - 10.1088/1742-6596/1605/1/012184
Subject(s) - microstructure , materials science , welding , carbide , ferrite (magnet) , metallurgy , alloy , flux (metallurgy) , copper , joint (building) , phase (matter) , electrode , composite material , chemistry , structural engineering , organic chemistry , engineering
During manual self propagating welding, there are segregation phenomena of iron rich phase and copper rich phase. Cr element can restrain the segregation phenomenon of iron rich phase and copper rich phase. Cr is a strong ferrite element. When the amount of Cr 2 O 3 + Al in the flux is less than 3wt%, with the increase of &2O3 + Al content, the microstructure of the weld alloy tends to be homogenized and the mechanical properties of the welded joint improve; when the amount of Cr 2 O 3 + Al in the flux is more than 4wt%, Cr and C form Carbides are easy to produce microcracks in the fusion zone and reduce the mechanical properties of the joint. The best addition of Cr 2 O 3 + Al in the flux is 3wt% ~ 4wt%.