VERFAHREN ZUR HERSTELLUNG DER WERKSTUECKE FUER SCHAUFELN VON TURBINEN UND VERDICHTERN SOWIE EIN GESENK ZU DESSEN DURCHFUEHRUNG

摘要

A method of making turbine or compressor blade blanks includes providing a blank (18), applying a protecting and lubricating coating thereon, drying the coating and heating the blank (18). Following the above steps, the blank (18) is subjected to progressive deformation along its length conjointly with three-dimensional pressing in a single space of a closed die set (1, 10) in a single operation. Prior to shaping, the blank surface may be profiled to retain the lubricant. The blank is of titanium alloy. The blank is preferably deformed in a superplasticity mode. A die set for hot shaping of the blank comprises a male die (1) mounted on a top platen (7) of the die set for reciprocation relative to the blank (18) and for rotation in the plane of its reciprocation. In the initial position, the shaping surface of the male die (1) extends at an angle to the longitudinal axis of the blank (18). The female die (10) of the die set is mounted on a bottom platen (13).