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公开(公告)号:US20140020797A1
公开(公告)日:2014-01-23
申请号:US13553940
申请日:2012-07-20
申请人: Michael P. BRADY , Gail M. LUDTKA , Gerard M. LUDTKA , Govindarajan MURALIDHARAN , Don M. NICHOLSON , Orlando RIOS , Yukinori YAMAMOTO
发明人: Michael P. BRADY , Gail M. LUDTKA , Gerard M. LUDTKA , Govindarajan MURALIDHARAN , Don M. NICHOLSON , Orlando RIOS , Yukinori YAMAMOTO
CPC分类号: C21D6/02 , C21D1/18 , C21D1/26 , C21D2201/03 , C21D2211/004 , C21D2281/00 , C22C1/02 , C22C19/03 , C22C30/00 , C22C38/00 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22F1/10
摘要: The method provides heat-resistant chromia- or alumina-forming Fe-, Fe(Ni), Ni(Fe), or Ni-based alloys having improved creep resistance. A precursor is provided containing preselected constituents of a chromia- or alumina-forming Fe-, Fe(Ni), Ni(Fe), or Ni-based alloy, at least one of the constituents for forming a nanoscale precipitate MaXb where M is Cr, Nb, Ti, V, Zr, or Hf, individually and in combination, and X is C, N, O, B, individually and in combination, a=1 to 23 and b=1 to 6. The precursor is annealed at a temperature of 1000-1500° C. for 1-48 h in the presence of a magnetic field of at least 5 Tesla to enhance supersaturation of the MaXb constituents in the annealed precursor. This forms nanoscale MaXb precipitates for improved creep resistance when the alloy is used at service temperatures of 500-1000° C. Alloys having improved creep resistance are also disclosed.
摘要翻译: 该方法提供具有改善的抗蠕变性的耐热氧化铬或氧化铝形成的Fe-,Fe(Ni),Ni(Fe)或Ni基合金。 提供了一种前体,其含有氧化铬或氧化铝形成的Fe-,Fe(Ni),Ni(Fe)或Ni基合金的预选成分,至少一种用于形成纳米尺度沉淀物MaXb的组分,其中M为Cr ,Nb,Ti,V,Zr或Hf组合,X为C,N,O,B,单独且组合为a = 1〜23,b = 1〜6。 温度为1000-1500℃,在至少5特斯拉的磁场存在下1-48小时,以增强退火前体中MaXb组分的过饱和。 当在500-1000℃的使用温度下使用合金时,这形成了纳米尺度的MaXb沉淀物,以提高耐蠕变性。还公开了具有改善的抗蠕变性的合金。
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公开(公告)号:US20120301347A1
公开(公告)日:2012-11-29
申请号:US13114745
申请日:2011-05-24
IPC分类号: C22C38/40 , C22C38/58 , C22C38/42 , C22C38/44 , C22C38/56 , C22C38/50 , C22C38/46 , B22D25/06 , C22C38/54 , C22C38/52 , C22C38/48
CPC分类号: B22D25/06 , C22C33/04 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/06 , C22C38/44 , C22C38/48 , C22C38/54 , C22C38/58
摘要: An austenitic stainless steel alloy consisting essentially of, in terms of weight percent ranges 0.15-0.5C; 8-37Ni; 10-25Cr; 2.5-5Al; greater than 0.6, up to 2.5 total of at least one element selected from the group consisting of Nb and Ta; up to 3Mo; up to 3Co; up to 1W; up to 3Cu; up to 15Mn; up to 2Si; up to 0.15B; up to 0.05P; up to 1 total of at least one element selected from the group consisting of Y, La, Ce, Hf, and Zr;
摘要翻译: 奥氏体不锈钢合金,其重量百分比基本上在0.15-0.5℃范围内; 8-37Ni; 10-25Cr; 2.5-5Al; 大于0.6,最多2.5个选自Nb和Ta中的至少一种元素; 高达3Mo; 高达3Co 高达1W; 达3Cu; 高达15Mn; 高达2Si; 最高0.15B; 高达0.05P; 最多1个选自Y,La,Ce,Hf和Zr中的至少一种元素; <0.3Ti + V; <0.03N; 并且平衡Fe,其中Fe的重量百分比大于Ni的重量百分比,并且其中所述合金形成包含氧化铝的外部连续刻度,以及稳定的基本上单相的FCC奥氏体基体微观结构,所述奥氏体基体基本上不含铁素体的铁素体 并且基本上不含BCC相。 还公开了制造奥氏体不锈钢合金的方法。
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