Patent ID: 6596411
Filing Date: 2003-07-22
Classification: B23K,C21D,Y10T

Abstract:
A method of high-energy beam welding at least two single-crystal superalloy articles, the method comprising the steps of:placing a shim in a gap between the articles so that the shim contacts faying surfaces of the articles, the shim being formed of a superalloy that is more ductile than the superalloys of the articles; welding the articles together with a high-energy beam operated at a pulsed current frequency of about 10 to 50 Hz, a travel speed of about 0.85 to about 1.5 cm/s, a voltage level of about 100 to about 150 kV, and a current level of about 10 to 40 milliamps, the high-energy beam melting the shim and portions of the articles contacting the shim to cause mixing of the superalloys of the shim and articles; and then cooling the articles to yield a weld joint having a W-shaped joint root.