发明申请
US20120301309A1 DISSIMILAR METAL WELDS AND ITS MANUFACTURING METHOD OF LARGE WELDED STRUCTURES SUCH AS THE TURBINE ROTOR
审中-公开
大型金属焊接及其大型焊接结构如涡轮转子的制造方法
- 专利标题: DISSIMILAR METAL WELDS AND ITS MANUFACTURING METHOD OF LARGE WELDED STRUCTURES SUCH AS THE TURBINE ROTOR
- 专利标题(中): 大型金属焊接及其大型焊接结构如涡轮转子的制造方法
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申请号: US13477289申请日: 2012-05-22
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公开(公告)号: US20120301309A1公开(公告)日: 2012-11-29
- 发明人: Eiji NISHIOKA , Jun SATO , Shinya IMANO , Takeshi KUDO , Kenichi MURATA , Kazutaka HOSOKAWA , Kazuhiko ENDO
- 申请人: Eiji NISHIOKA , Jun SATO , Shinya IMANO , Takeshi KUDO , Kenichi MURATA , Kazutaka HOSOKAWA , Kazuhiko ENDO
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 优先权: JP2011-115134 20110523
- 主分类号: F04D29/38
- IPC分类号: F04D29/38 ; B23K1/19 ; B23K28/00 ; B23K101/00
摘要:
Dissimilar metal welds including a buttering portion with a small variation in strength distribution in a plate thickness direction are formed by welding two parent materials having at least one of different compositions and different refining conditions through a buttering for alleviating mismatch between one of the different compositions and the different refining conditions of the two members and through a welded metal for joining one of the parent materials and the buttering. The buttering is formed of welding metals laminated in a plate thickness direction, and a dilution ratio of the buttering with the parent materials is 50% or less. The manufacturing method includes performing butt welding on a dummy material formed by increasing a groove depth by providing a member on a bottom side of a welding groove and on parent materials by using the buttering; and processing a groove within a welding metal formed of the buttering.