Method of joining turbine blade parts

Claim 1

A METHOD OF FORMING A UNITARY METAL ARTICLE WHICH COMPRISES PROVIDING AT LEAST TWO CHROMIUM-CONTAINING METALLIC COMPONENTS OF SUBSTANTIALLY THE SAME COMPOSITION MADE OF AN ALLOY SELECTED FROM THE GROUP CONSISTING OF NICKEL-CHROMIUM ALLOYS ND COBALT-CHROMIUM ALLOYS CONTAINING AT LEAST 25% OF CHROMIUM PLUS METAL FROM THE GROUP CONSISTING OF NICKEL AND COBALT WITH THE BALANCE BETWEEN ESSENTIAALLY IRON AND HAVING MATING FACES, INTERPOSING BETWEEN SAID FACES OF SAID METALLIC COMPONENTS A LAYER OF METALLIC NICKEL HAVING A THICKNESS OF ABOUT 0.0005 INCH TO ABOUT 0.005 INCH, AND PRESSING SAID COMPONENTS TOGETHER AT SAID FACE WITH A PRESSURE OF ABOUT 10,000 POUNDS PER SQUARE INCH TO ABOUT 20 TONS PER SQUARE INCH AND INSUFFICIENT TO SUBSTANTIALLY DEFORM SAID COMPONENTS, WHILE HEATING THE ASSEMBLY FO FORMED AT BETWEEN ABOUT 1000* C. AND ABOUT 1100*C. FOR ABOUT EIGHT HOURS TO ABOUT FIFTEEN HOURS TO SUBSTANTIALLY ELIMINATE SAID NICKEL LAYER BY DIFFUSION INTO AND BETWEEN SAID COMPONENTS AND PROVIDE A SUBSTANTIALLY HOMOGENEOUS ARTICLE HAVING A COMPOSITION THROUGHOUT THE BODY OF SAID ARTICLE UNIFORMLY RESISTANT TO THE ADVERSE EFFECTS OF OXIDIATION AT HIGH AND LOW TEMPERATURES.

Claim 2

A METHOD OF FORMING A UNITARY METAL ARTICLE WHICH COMPRISES PROVIDING AT LEAST TWO CHROMIUM-CONTAINING METALLIC COMPONENTS OF SUBSTANTIALLY THE SAME COMPOSITION MADE OF AN ALLOY SELECTED FROM THE GROUP CONSISTING OF NICKEL-CHROMIUM ALLOYS ND COBALT-CHROMIUM ALLOYS CONTAINING AT LEAST 25% OF CHROMIUM PLUS METAL FROM THE GROUP CONSISTING OF NICKEL AND COBALT WITH THE BALANCE BETWEEN ESSENTIAALLY IRON AND HAVING MATING FACES, INTERPOSING BETWEEN SAID FACES OF SAID METALLIC COMPONENTS A LAYER OF METALLIC NICKEL HAVING A THICKNESS OF ABOUT 0.0005 INCH TO ABOUT 0.005 INCH, AND PRESSING SAID COMPONENTS TOGETHER AT SAID FACE WITH A PRESSURE OF ABOUT 10,000 POUNDS PER SQUARE INCH TO ABOUT 20 TONS PER SQUARE INCH AND INSUFFICIENT TO SUBSTANTIALLY DEFORM SAID COMPONENTS, WHILE HEATING THE ASSEMBLY FO FORMED AT BETWEEN ABOUT 1000* C. AND ABOUT 1100*C. FOR ABOUT EIGHT HOURS TO ABOUT FIFTEEN HOURS TO SUBSTANTIALLY ELIMINATE SAID NICKEL LAYER BY DIFFUSION INTO AND BETWEEN SAID COMPONENTS AND PROVIDE A SUBSTANTIALLY HOMOGENEOUS ARTICLE HAVING A COMPOSITION THROUGHOUT THE BODY OF SAID ARTICLE UNIFORMLY RESISTANT TO THE ADVERSE EFFECTS OF OXIDIATION AT HIGH AND LOW TEMPERATURES.