Invention Grant
- Patent Title: Cr-containing austenitic alloy tube and method for producing the same
- Patent Title (中): 含Cr奥氏体合金管及其制造方法
-
Application No.: US13819072Application Date: 2011-08-12
-
Publication No.: US09255319B2Publication Date: 2016-02-09
- Inventor: Yasuhiro Masaki , Masahito Tasaka , Manabu Kanzaki , Akihiro Uehira , Shoji Kinomura
- Applicant: Yasuhiro Masaki , Masahito Tasaka , Manabu Kanzaki , Akihiro Uehira , Shoji Kinomura
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Clark & Brody
- Priority: JP2010-189111 20100826
- International Application: PCT/JP2011/068414 WO 20110812
- International Announcement: WO2012/026344 WO 20120301
- Main IPC: C23C8/18
- IPC: C23C8/18 ; F16L9/02 ; C22C19/05 ; G21D1/00 ; C21D6/00 ; C21D8/10 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/42 ; C21D9/08 ; C22F1/00 ; C22F1/10 ; G21F9/28 ; C22C38/58
Abstract:
There is provided a Cr-containing austenitic alloy tube, wherein a chromium oxide film with a thickness of 0.05 to 1.5 μm having the relationship defined by Formula (i) is formed on the inner surface of the tube, wherein the average concentration of C in the depth range of 5 to 10 μm from the inner surface is lower than the concentration of C in a base metal; 0.4≦δ1/δ2≦2.5 (i) wherein δ1 and δ2 are thicknesses (μm) of the chromium oxide film at both ends of tube, respectively.
Public/Granted literature
- US20130206272A1 Cr-CONTAINING AUSTENITIC ALLOY TUBE AND METHOD FOR PRODUCING THE SAME Public/Granted day:2013-08-15
Information query
IPC分类:
