公开(公告)号：US11471946B2

公开(公告)日：2022-10-18

申请号：US16563278

申请日：2019-09-06

申请人： Triad National Security, LLC

发明人： Thomas J. Lienert ,  Stuart Andrew Maloy ,  Benjamin P. Eftink ,  Daniel Vega

IPC分类号： B22F3/105 ,  C22F1/00 ,  B22F12/00 ,  B33Y80/00 ,  B33Y70/00 ,  B33Y10/00 ,  B33Y30/00 ,  B22F10/10

摘要： Techniques for using additive manufacturing (AM) to fabricate creep resistant ferritic/martensitic steel with improved high temperature strength are described. AM processing may be performed on Grade 91 steel powder. Beam powers from about 221 W to about 270 W may be used. Traverse rates from about 675 mm/s to about 825 mm/s may be used. Heat inputs ranging from about 55.7 J/mm3 to about 83.2 J/mm3 may be produced. Creep resistant ferritic/martensitic steel, produced according to the present disclosure, has improved strain yield strength and ductility as compared to wrought steel.

公开(公告)号：US20200078865A1

公开(公告)日：2020-03-12

申请号：US16563278

申请日：2019-09-06

申请人： Triad National Security, LLC

发明人： Thomas J. Lienert ,  Stuart Andrew Maloy ,  Benjamin P. Eftink ,  Daniel Vega

IPC分类号： B22F3/105 ,  C22F1/00

摘要： Techniques for using additive manufacturing (AM) to fabricate creep resistant ferritic/martensitic steel with improved high temperature strength are described. AM processing may be performed on Grade 91 steel powder. Beam powers from about 221 W to about 270 W may be used. Traverse rates from about 675 mm/s to about 825 mm/s may be used. Heat inputs ranging from about 55.7 J/mm3 to about 83.2 J/mm3 may be produced. Creep resistant ferritic/martensitic steel, produced according to the present disclosure, has improved strain yield strength and ductility as compared to wrought steel.