公开(公告)号：EP0118380B1

公开(公告)日：1988-07-06

申请号：EP84420039.4

申请日：1984-03-06

申请人： HOWMET CORPORATION (a Delaware corp.)

发明人： Smickley, Robert J. ,  Dardi, Louis E.

IPC分类号： C22B9/14 ,  C22F1/18 ,  C22F1/00 ,  C22B34/12 ,  F02F7/00 ,  A61F2/00 ,  F01D5/28

CPC分类号： C22B9/14 ,  C21D1/00 ,  C22B34/1295 ,  C22B34/14 ,  C22F1/183 ,  C22F1/186

公开(公告)号：EP0118380A2

公开(公告)日：1984-09-12

申请号：EP84420039.4

申请日：1984-03-06

申请人： HOWMET CORPORATION (a Delaware corp.)

发明人： Smickley, Robert J. ,  Dardi, Louis E.

IPC分类号： C22B9/14 ,  C22F1/18 ,  C22F1/00 ,  C22B34/12 ,  F02F7/00 ,  A61F2/00 ,  F01D5/28

CPC分类号： C22B9/14 ,  C21D1/00 ,  C22B34/1295 ,  C22B34/14 ,  C22F1/183 ,  C22F1/186

摘要： A method of refining the microstructure of metals which undergo a phase transformation at high temperatures by diffusing a solute material into the metal at a temperature (T 2 ) below the normal transformation temperature (T T ). The solute induces the phase transformation and removal of the solute at a temperature (T 2 ,T 3 ) near the transformation temperature reverses the transformation.
These phase transformations refine the microstructure of the metal so treated. The method is particularly useful to Group IVB metals i.e. Zr, Hf and Ti.