公开(公告)号：EP2615187B1

公开(公告)日：2017-03-15

申请号：EP13163153.3

申请日：2004-05-05

申请人： ATI Properties LLC

发明人： Hebda, John J. ,  Hickman, Randall W. ,  Graham, Ronald A.

IPC分类号： C22C14/00 ,  C22F1/18

CPC分类号： B21B1/26 ,  C22C14/00 ,  C22F1/183

摘要： The invention provide an ±-² titanium alloy article consisting of, in weight percentages, from 2.9 to 5.0 aluminium, from 2.0 to 3.0 vanadium, from 0.4 to 2.0 iron, from 0.2 to 0.3 oxygen, from 0.005 to 0.3 carbon, from 0.001 to 0.02 nitrogen, less than 0.5 of other elements, balance and incidental impurities, wherein the ±-² titanium alloy article is cold worked at a temperature no greater than 677°C (1250°F) and annealed, characterized in that the ±-² titanium alloy article in the cold worked and annealed condition exhibits, at room temperature, tensile strength of at least 827 MPa (120 KSI), ultimate tensile strength of at least 896 MPa (130 KSI), and elongation of at least 10%. The invention further provides a method of forming an article from an ±-² titanium alloy comprising hot working the ±-² titanium alloy at a temperature greater than 841°C (1600°F), cold working the ±-² titanium alloy at a temperature no greater than 677°C (1250°F), and annealing the ±-² titanium alloy.