ガスタービンロータの固相接合に関する研究

概要

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This study has been undertaken to produce a dual alloy gas turbine integral rotor composed of a precision cast Ni base superalloy bladed shell and a HIP consolidated Ni base superalloy core with a powder metal interlayer, Solid state diffusion bonding between solid metal and powder metal was investigated to bond both materials to each other. Prior to bonding, the solid metal was coated with Ni-electroplating, Au-electroplating and Ni ion plating. Compared with those coatings, including non-coating, Ni ion plating showed the highest mechanical integrity. Almost all failures in room temperature tensile tests and high temperature low cycle fatigue tests were located in the solid metal (casting or HIP consolidated metal). In stress rupture tests, several test pieces broke on the bond line. However, they showed almost the same rupture life as that of the solid metal.
一般社団法人日本機械学会の論文
1988-03-25