公开(公告)号：US20030221755A1

公开(公告)日：2003-12-04

申请号：US10160751

申请日：2002-05-31

Applicant: OSRAM SYLVANIA Inc.

Inventor： Ricky D. Morgan ,  Thomas J. Dixon ,  Harry D. Martin III

IPC: C22C027/04

CPC classification number: C22C27/04 ,  B22F3/16 ,  B22F2003/185 ,  B22F2003/248 ,  B22F2998/10 ,  C22C32/0031 ,  B22F3/02 ,  B22F3/10 ,  B22F3/18 ,  B22F3/24

Abstract: A large-diameter tungsten-lanthana rod having an elongated grain structure substantially parallel to the longitudinal axis of the rod is described. The large diameter rod is produced by rolling at a temperature greater than 1400null C. and less than 1700null C. to achieve at least about a 40% reduction in cross-sectional area. The high strength of the longitudinally elongated grain structure is desirable for applications such as rocket nozzles.

Abstract translation: 描述了具有基本上平行于棒的纵向轴线的细长晶粒结构的大直径钨 - 镧棒。 大直径杆通过在大于1400℃和小于1700℃的温度下轧制而产生，以实现至少约40％的横截面积减小。 纵向细长的晶粒结构的高强度对于诸如火箭喷嘴的应用是理想的。