Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
162 words
Process for the crack-free energy beam welding of temperature resistant shaped parts, made of nickel and cobalt-based superalloys containing 5 to 24% chromium, up to 11% molybdenum, up to 2% niobium, tantalum and niobium up to 7%, up to 22% cobalt, up to 6% titanium, up to 7% aluminum, 0.01 to 0.5% carbon, 0.001 to 0.2% beryllium, up to 0.3% zirconium, up to 2% hafnium, up to 6% iron and up to 12% tungsten, balance nickel (all percentages by weight), characterized in that the weld zone and an adjacent area are heated to a preheat temperature of between 1070° to 1180° C. and maintained at said preheat temperature until the temperature has been at least extensively equalized within the weld zone and the adjacent area, the abutting weld surfaces in contact with each other are melted and welded to each other by means of an energy beam, and the weld zone and the adjacent area are subsequently cooled in a uniform manner.
Claim 2
Dependent Claim
162 words
Process for the crack-free energy beam welding of temperature resistant shaped parts, made of nickel and cobalt-based superalloys containing 5 to 24% chromium, up to 11% molybdenum, up to 2% niobium, tantalum and niobium up to 7%, up to 22% cobalt, up to 6% titanium, up to 7% aluminum, 0.01 to 0.5% carbon, 0.001 to 0.2% beryllium, up to 0.3% zirconium, up to 2% hafnium, up to 6% iron and up to 12% tungsten, balance nickel (all percentages by weight), characterized in that the weld zone and an adjacent area are heated to a preheat temperature of between 1070° to 1180° C. and maintained at said preheat temperature until the temperature has been at least extensively equalized within the weld zone and the adjacent area, the abutting weld surfaces in contact with each other are melted and welded to each other by means of an energy beam, and the weld zone and the adjacent area are subsequently cooled in a uniform manner.
Claim 3
Dependent Claim
20 words
Process according to claim 1, characterized in that the shaped parts are heated to the preheat temperature in their entirety.
Claim 4
Dependent Claim
13 words
Process according to claim 1, wherein the said shaped parts are cast parts.
Claim 5
Dependent Claim
36 words
Process according to claim 1 or 2, characterized in that parts made of a material for which solution annealing is specified, are heated to a preheat temperature not lower than 30° below the solution annealing temperature.
Claim 6
Dependent Claim
30 words
Process according to claim 4, characterized in that the weld zone and the adjacent area are cooled according to the specifications of the material manufacturer for cooling after solution annealing.
Claim 7
Dependent Claim
31 words
Process according to claim 5, characterized in that the shaped parts are made of superalloy materials having different solution annealing temperatures and the higher of said solution annealing temperatures is used.
Claim 8
Dependent Claim
38 words
Process according to claim 6, characterized in that the shaped parts are made of superalloy materials having different cooling specifications and the weld zone and the adjacent area are cooled in keeping with the stricter of said specifications.
Claim 9
Dependent Claim
18 words
Process of claim 1, wherein the shaped parts are hot parts of turbines for manufacturing or repair purposes.