公开(公告)号：JP2000144289A

公开(公告)日：2000-05-26

申请号：JP31192898

申请日：1998-11-02

Applicant: UNITED TECHNOLOGIES CORP

Inventor： DAVID N DYUORU ,  ALAN D SETEL

IPC: F02C7/00 ,  C22C19/03

Abstract: PROBLEM TO BE SOLVED: To obtain a composition capable of producing a single-crystal body improved in high temperature durability and heat treatment stability by providing a chemical composition in which respective amounts of Cr, Al, Ti satisfying specific relationship with respect to the sum of Al and Ti and the ratio between them, Ta, W, Mo, Nb, Hf, and Re are specified and C, B, Zr, and V are not added and Co for stabilization and Ni as a balance component are incorporated. SOLUTION: In this composition, 5-12% Cr, 2-8% Al, =4% and the ratio between Al and Ti becomes at least 1:1, 5% and also Co for stabilization and Ni as a balance component are contained. Preferably, 7-12% Cr, 3-7% Al, 1-5% Ti, 1-8% Ta,