IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0593931
(1984-03-27)
|
| 우선권정보 |
JP-0050495 (1983-03-28) |
|
발명자
/ 주소 |
- Usami Kenichi (Hitachi JPX) Kirihara Seishin (Hitachi JPX) Doi Hiroyuki (Hitachi JPX) Asano Choichi (Hitachi JPX) Sukekawa Masayuki (Kitaibaraki JPX) Sakaguchi Yasuhide (Kure JPX)
|
| 출원인 / 주소 |
- Hitachi, Ltd. (Tokyo JPX 03) Babcock-Hitachi Kabushiki Kaisha (Tokyo JPX 03)
|
| 인용정보 |
피인용 횟수 :
14 인용 특허 :
5 |
초록
▼
A boiler tube having a double-tube structure constituted by an inner tube and an outer tube integrated with each other. The inner tube is made of an alloy consisting essentially of, by weight, 0.02 to 0.15% of C, 0.5 to 3.5% of Si, not greater than 2% of Mn, 25 to 40% of Ni, 20.5 to 27% of Cr, 0.5 t
A boiler tube having a double-tube structure constituted by an inner tube and an outer tube integrated with each other. The inner tube is made of an alloy consisting essentially of, by weight, 0.02 to 0.15% of C, 0.5 to 3.5% of Si, not greater than 2% of Mn, 25 to 40% of Ni, 20.5 to 27% of Cr, 0.5 to 3% of Mo, not greater than 1% of Nb and the balance Fe and having a substantially fully austenite structure. The outer tube is made of an alloy consisting essentially of, by weight, 0.02 to 0.2% of C, not greater than 3.5% of Si, not greater than 2% of Mn, 33 to 45% of Ni, 30 to 40% of Cr and the balance Fe and having a substantially fully austenite structure. The inner tube made of the alloy having the composition specified above exhibits a high resistance to steam oxidation without any reduction in high-temperature strength even at elevated steam temperature, while the outer tube made of the alloy having the composition specified above exhibits a superior resistance to corrosion by coal combustion gas.
대표청구항
▼
A boiler tube having a double-tube structure constituted by an inner tube and an outer tube integrated with each other, characterized in that: said inner tube is made of an alloy consisting essentially of, by weight, 0.02 to 0.15% of C, 0.5 to 3.5% of Si, not greater than 2% of Mn, 25 to 40% of Ni,
A boiler tube having a double-tube structure constituted by an inner tube and an outer tube integrated with each other, characterized in that: said inner tube is made of an alloy consisting essentially of, by weight, 0.02 to 0.15% of C, 0.5 to 3.5% of Si, not greater than 2% of Mn, 25 to 40% of Ni, 20.5 to 27% of Cr, 0.5 to 3% of Mo, not greater than 1% of Nb and the balance Fe and having a substantially fully austenite structure; and said outer tube is made of an alloy consisting essentially of, by weight, 0.02 to 0.2% of C, not greater than 3.5% of Si, not greater than 2% of Mn, 33 to 45% of Ni, 30 to 40% of Cr and the balance Fe and having a substantially fully austenite structure.
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