Thermal working method of metal material containing helium and t

Details Thermal working method of metal material containing helium and t Thermal working method of metal material containing helium and t

1995-11-07

1998-03-24

Shaw, Clifford C.

Electric heating

Metal heating

By arc

219136, 228232, B23K 900

Patent

active

057315671

ABSTRACT:
A method of performing thermal working to metal material containing helium, which comprises the steps of previously feeding current through a thermally working portion of the metal material containing helium to thereby reduce a helium content in the portion without melting the portion and then heating and melting the portion to improve the defects of the metal structure of the metal material containing helium. As a result, the improvement and removal of defects of the metal structure can be achieved by reducing a helium content in the thermally working portion of the metal material.

REFERENCES:
patent: 4229235 (1980-10-01), Matsuda et al.
patent: 5106010 (1992-04-01), Stueber et al.
Wang et al., "Technique to Eliminate Helium Induced Weld Cracking in Stainless Steels", ASTM STP1175, no date.
Kanne, Jr., "Remote Reactor Repair: GTA Weld Cracking Caused by Entrapped Helium", Aug. 1988, Welding Journal, pp. 33-39.

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