Open AccessWelding procedure Research of Niobium Heat Exchanger
Author(s) -
Chengjun Jiang,
Xiaoli Zhang,
Yu Du,
Wei Wang
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 - 10.1088/1742-6596/1820/1/012061
Subject(s) - welding , niobium , hydrostatic test , materials science , gas tungsten arc welding , metallurgy , weldability , heat exchanger , gas metal arc welding , shielding gas , arc welding , composite material , mechanical engineering , engineering
The weldability of R04200 niobium tube-to-tubesheet is analyzed. The macroscopic examination, penetration testing, hydrostatic testing and metallographic examination are tested by the method of GTAW. The results show that specific welding structures with He-Ar mixed gas as shielding gas can improve the arc stiffness, thermal efficiency and penetration. It expresses the great significance of formulating the welding methods guidance of niobium pressure vessels.