Abstract: A method of producing bellows from metal alloys comprises reeling a tubular workpiece to reduce the wall thickness thereof under volume deformation, heating the reeled tubular workpiece at a rate of 100 to 800.degree. C. per sec by passing electric current therethrough up to a temperature exceeding the recrystallization of the alloys, and cooling the heated tubular workpiece. Thereafter, the tubular workpiece wall is locally deformed in a transverse direction to form annular grooves thereon, and then corrugations are made by plastically deforming the tubular workpiece under axial compression and under excessive internal pressure produced therein. Thus obtained corrugated workpiece is heated by passing electric current therethrough at a rate of 25 to 100.degree. per sec up to a temperature at which finely dispersed phases of the alloy precipitate at a maximum rate, and held at the above temperature for 0.5 to 120 min.

Abstract: An apparatus comprising a case with a carriage mounted on horizontal guides thereof which carriage supports two brackets provided with contact clamps. Under the brackets there is mounted a bath containing a cooling medium. At least one of the brackets is movable and is resiliently pressed in the direction opposite to the second bracket. A rod of a power cylinder is in contact with the movable bracket which rod serves only to put the brackets closer. The contact clamps are provided with mandrels to be inserted into a tubular workpiece.