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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。