Open AccessHeat transfer characteristics of graphite welding pool in penetration brazing of Cu/Ni dissimilar metal wires
Author(s) -
Xin Zeng,
Yawei Gao,
Y. B. Wang,
Zhiguo Feng
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 - 10.1088/1742-6596/1777/1/012009
Subject(s) - graphite , brazing , materials science , copper , welding , penetration (warfare) , electrode , composite material , metallurgy , heat affected zone , heat transfer , filler metal , arc welding , alloy , thermodynamics , chemistry , operations research , engineering , physics
In order to discuss the heat transfer characteristics of the graphite welding pool and the copper electrode, in penetration brazing of Cu/Ni dissimilar metal wire. A mathematical model for electrothermal coupling, on penetration brazing of Cu/Ni dissimilar metal wire, is developed, to describe temperature distribution and influence factors of different types of graphite welding pool and copper electrode, using simulation and experimental tests. The simulation results show that temperatures of the common graphite welding pool is 749.88°C, while the experimental results show that temperatures of the common graphite welding pool is 752.23°C, and the corresponding temperature range of the copper electrode is 236.5°C to 752.23°C, respectively. Furthermore, the length of the copper electrode at high temperature is 16 mm. Since the common graphite has the lowest thermal conductivity, higher thermal resistance, at the contact interface, is developed, while the contact heat, transferred to electrode, is reduced. Last, the heat transfer effect of the common graphite is stronger than that of fine graphite, isostatic graphite and molded graphite.