Welding procedure Research of Niobium Heat Exchanger. Issue 1 (March 2021)

• Record Type: Journal Article
• Authors: Jiang, Chengjun; Zhang, Xiaoli; Du, Yannan; Wang, Wei
• Is Part Of: Journal of physics. Volume 1820:Issue 1(2021)
• Publication Date: 2021-03
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1820/1/012061
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: 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.