Shielding gas to reduce weld hot cracking

Details Shielding gas to reduce weld hot cracking Shielding gas to reduce weld hot cracking

1991-08-20

1994-04-26

Dean, R.

Metal treatment

Stock

Nickel base

219 72, 219 74, 228219, 420590, 423351, C22C 1905

Patent

active

053063589

ABSTRACT:
An inert gas nitrogen mixture is used as a shielding gas to prevent weld hot cracking in superalloys containing zirconium and/or boron. The gas mixture preferably contains argon and about 2 to 8% by volume nitrogen. Test data show excellent results are obtained when gas tungsten arc welding HAYNES 214 alloy which normally contains boron and zirconium and a minimal content of titanium.

REFERENCES:
patent: 2602871 (1952-07-01), Noland et al.
patent: 5083002 (1992-01-01), Hoback et al.
Metals Handbook, 9th Ed., vol. 6: Welding, Brazing, and Soldering, pp. 163, 164, 436, 438, and 439; American Society for Metals (1983).
M. J. Cieslak, et al., "A Study of the Weldability and Weld Related Microstructure of Cabot Alloy 214", Metallurgical Transactions A, vol. 19A (Mar. 1988), pp. 657 to 667.

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