Patent ID: 8888448

Claim:
A method for manufacture of a circular revolution thermomechanical part including a load-bearing substrate made from titanium or titanium alloy lined with a steel or superalloy, the method comprising: a) producing a first blank made from titanium or titanium alloy having a general circular shape as close as possible to a shape and external dimensions of the part to be manufactured; b) producing a second blank made from steel, or steel alloy, or superalloy incombustible in presence of burning titanium, having a general circular shape including at least one diameter less than a diameter of the circular first blank made from titanium or titanium alloy and as close as possible to the shape and internal dimensions of the part to be manufactured; c) machining, using the internal dimensions of the part to be manufactured, an inner surface of the second blank made from steel, or steel alloy, or superalloy; d) fitting the second blank made from steel, or steel alloy, or superalloy in the first blank made from titanium or titanium alloy; and e) cladding by hydroforming of the second blank made from steel, or steel alloy, or superalloy against the first blank made from titanium or titanium alloy under process conditions such that mechanical connections created at an interface have no fragile phases in a course of thermomechanical cycles to which the part is subsequently subjected, wherein the cladding e) includes deforming a plastic receptacle, filled with an incompressible fluid, and in direct contact with the inner surface of the second blank made of steel, or steel alloy, or superalloy by compression.