公开(公告)号：CA1229249A

公开(公告)日：1987-11-17

申请号：CA456768

申请日：1984-06-18

Applicant: UNITED TECHNOLOGIES CORP

Inventor： BERCZIK DOUGLAS M ,  BRODI GEORGE ,  O'CONNELL THOMAS E

IPC: C22C14/00 ,  C22F1/00 ,  C22F1/18

Abstract: Improved Processing for Titanium Alloys Process for improving the crack growth behavior of titanium alloys containing substantial beta stabilizers and at least 3% molybdenum, such as Ti-6-2-4-6. The process includes the steps of forging above the beta transus temperature, cooling at a controlled rate through the beta transus temperature, heating to a temperature between 50-150.degree.F below the beta transus temperature, cooling the alloy at a rate in excess of that produced by air cooling, and aging the material between about 900.degree.F and 1100.degree.F. The resultant material has substantially improved crack growth behavior when contrasted with material processed according to the prior art.

公开(公告)号：CA1208924A

公开(公告)日：1986-08-05

申请号：CA432656

申请日：1983-07-18

Applicant: UNITED TECHNOLOGIES CORP

Inventor： WINFREE JULES P ,  CHIN HERBERT A J ,  O'CONNELL THOMAS E

IPC: F16C3/00 ,  C22C19/03 ,  C22C19/05 ,  C22F1/00 ,  C22F1/10 ,  F16C3/02

Abstract: High Modulus Shafts High modulus turbine shafts are described as are the process parameters for producing these shafts. The shafts have a high modulus as a result of having high texture in the axial direction. The shafts are produced from a nickel base material having a strengthening phase and a moderate to high stacking fault energy. A combination of hot axisymmetric deformation followed by cold axisymmetric deformation produces an intense singular texture and results in shaft material whose modulus is on the order of 25% greater than that of the steel materials used in the prior art.