公开(公告)号：EP3202932A4

公开(公告)日：2018-06-20

申请号：EP15847305

申请日：2015-09-29

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： MASAKI YASUHIRO ,  KANZAKI MANABU ,  KITAMURA KAZUYUKI ,  KINOMURA SHOJI ,  MOMOZONO YUMI ,  MIYAHARA OSAMU

IPC分类号： C22C19/05 ,  C22F1/00 ,  C22F1/10 ,  G21D1/00

CPC分类号： C22C19/058 ,  B21C23/002 ,  B22D7/005 ,  C22C19/05 ,  C22F1/00 ,  C22F1/02 ,  C22F1/10 ,  F16L9/02 ,  G21D1/00

摘要： A Ni-based alloy tube includes a base metal having a chemical composition consisting, by mass percent, of C: 0.15% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 40.0%, Ni: 50.0 to 80.0%, Ti: 0.50% or less, Cu: 0.60% or less, Al: 0.20% or less, N: 0.20% or less, and the balance: Fe and impurities; and a low Cr content complex oxide film having a thickness of 25 nm or smaller at least on an inner surface of the base metal, wherein contents of Al, Ni, Si, Ti, and Cr in the film satisfy [at%Al/at%Cr ‰¤ 2.00], [at%Ni/at%Cr ‰¤ 1.40], and [(at%Si + at%Ti)/at%Cr ‰¥ 0.10].

公开(公告)号：EP2865771A4

公开(公告)日：2016-03-09

申请号：EP13806115

申请日：2013-06-19

申请人： NIPPON STEEL & SUMITOMO METAL CORP

发明人： MOMOZONO YUMI ,  YONEMURA MITSUHARU ,  MASAKI YASUHIRO ,  KANZAKI MANABU

IPC分类号： C22C19/05 ,  C21D1/26 ,  C21D6/00 ,  C21D8/10 ,  C21D9/08 ,  C22C30/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/40 ,  C22C38/42 ,  C22C38/50 ,  C22C38/58 ,  C22F1/00 ,  C22F1/02 ,  C22F1/10 ,  G21C15/02 ,  G21D1/00

CPC分类号： G21C15/02 ,  C21D1/26 ,  C21D6/004 ,  C21D8/10 ,  C21D8/105 ,  C21D9/08 ,  C22C19/05 ,  C22C19/058 ,  C22C30/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/40 ,  C22C38/42 ,  C22C38/50 ,  C22F1/00 ,  C22F1/02 ,  C22F1/10 ,  G21D1/006 ,  Y02E30/40

摘要： An austenitic alloy tube subjected to a cold working and an annealing heat treatment contains C: 0.01% to 0.15%, Cr: 10.0% to 40.0%, Ni: 8.0% to 80.0%, in mass%, and has a metallographic structure satisfying the following Expressions (i) to (iii). R ‰¤ f �¢ 1 R = I 220 / I 111 f �¢ 1 = 0.28 × F 111 8.0 / F 111 8.0 + 0.35 8.0 Where, in the above Expressions, R is a ratio of an integrated intensity of {220} to an integrated intensity of {111} on a surface layer which is measured by a grazing incidence X-ray diffraction method, I 220 is the integrated intensity of {220}, I 111 is the integrated intensity of {111}, and F 111 is full width of half maximum of {111} on the surface layer which is measured by the grazing incidence X-ray diffraction method.