公开(公告)号：US11408057B2

公开(公告)日：2022-08-09

申请号：US16435265

申请日：2019-06-07

申请人： Manoir Pitres ,  Université de Rouen Normandie ,  Centre National de la Recherche Scientifique ,  Institut National des Sciences Appliquées Rouen Normandie

发明人： Mathieu Couvrat ,  Antoine Facco ,  Cristelle Pareige

IPC分类号： C22C19/05 ,  C22F1/10 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50

摘要： An austenitic alloy based on nickel, chromium and iron, and having a high aluminum content, intended for use at a given operating temperature (Ts) between 900° C. and 1200° C., the alloy comprising the following elements, in weight percent: chromium between 20% and 32%, nickel between 30% and 60%, aluminum between 3.5% and 6%, carbon between 0.4% and 0.7%, titanium between 0.05% and 0.3%, niobium and/or tantalum between 0.6% and 2%, an element, composed of at least one rare earth and/or hafnium, between 0.002% and 0.1%, silicon between 0 and 0.5%, manganese between 0 and 0.5%, tungsten between 0 and 2%, and iron as the balance of the elements in the alloy. The alloy has less than 1% by volume of an intermetallic B2-NiAl phase and less than 1% by volume of an alpha prime phase rich in chromium, after subjecting the alloy to an operating temperature (Ts).