公开(公告)号：WO1993024683A1

公开(公告)日：1993-12-09

申请号：PCT/US1993003803

申请日：1993-04-22

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  BORNSTEIN, Norman, S. ,  CHIN, Stephen ,  DUHL, David, N. ,  PARILLE, Donald ,  SHAH, Dilip, M.

IPC: C30B29/52

CPC classification number: C22C19/057 ,  C22C19/056 ,  C30B11/00 ,  C30B29/52

Abstract: Single crystal superalloy castings are described which have excellent oxidation resistance. The oxidation resistance is due to the presence of small but effective amounts of magnesium in the casting. Single crystal castings containing magnesium in the range of 5-200 parts per million, by weight, are described. Up to 100 % of the magnesium could be substituted by an equal atomic percent of calcium. The superalloy further consists essentially of, by weight percent, 1-12 chromium, 2-12 cobalt, 0-2.5 molybdenum, 3-10 tungsten, 0-8 rhenium, 2.5-13 tantalum, 0-2 titanium, 4.5-6.5 aluminum, 0-0.5 hafnium, 0-0.1 carbon, 0.0005-0.0200 magnesium, remainder nickel.

Abstract translation: 描述了具有优异抗氧化性的单晶超合金铸件。 抗氧化性是由于在铸件中存在少量但有效量的镁。 描述了含有5-200重量ppm的镁的单晶铸件。 高达100％的镁可被等原子百分比的钙取代。 超合金还基本上由重量百分比为1-12铬，2-12钴，0-2.5钼，3-10钨，0-8铼，2.5-13钽，0-2钛，4.5-6.5铝 ，0-0.5铪，0-0.1碳，0.0005-0.0200镁，余量为镍。