公开(公告)号：JP2000192208A

公开(公告)日：2000-07-11

申请号：JP36705799

申请日：1999-12-24

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MARCIN JOHN JOSEPH JR ,  SCHIRRA JOHN JOSEPH ,  GIUGNO RALPH ,  NUNES JOY JOHN

IPC: C22C19/05 ,  B22D17/00 ,  B22D21/00 ,  C22C1/02 ,  C22C19/03 ,  C22C19/07 ,  C22F1/00 ,  C22F1/10 ,  C23C20060101 ,  F02C7/00

Abstract: PROBLEM TO BE SOLVED: To obtain the strength, durability and fatigue resistance matched for a corresponding superalloy forged member by executing the heat treatment at a specific temp. for specific time to the superalloy die casting member having blow hole and element segregation in cast condition. SOLUTION: The Ni base superalloy is heated and melted at the temp. higher than the melting temp. by 10-38 deg.C under reducing pressure of