公开(公告)号：CA1090168A

公开(公告)日：1980-11-25

申请号：CA267438

申请日：1976-12-08

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MAGYAR STEPHEN T ,  HIRAKIS EMANUEL C ,  GELL MAURICE L ,  FELTEN EDWARD J

IPC: C22C19/07 ,  C22F1/10 ,  B22D7/00

Abstract: Cobalt base alloys for use at elevated temperatures are disclosed that possess excellent resistance to oxidation/corrosion at elevated temperatures in combination with mechanical properties which exceed those of similar alloys currently in use. The sesistance to oxidation/corrosion is afforded by a particular combination of aluminum and chromium which act to form 8 protective aluminum layer and a synergistic combination of hafuium ant yttrium which act to promote adherence of the alumina. Refractory metal additions are utilized to improve the mechanical properties. The alloys of the invention are suited for use in gas turbine engines as well as industrial applications such as furnaces and chemical process apparatus.

公开(公告)号：US3918139A

公开(公告)日：1975-11-11

申请号：US48707474

申请日：1974-07-10

Applicant: UNITED TECHNOLOGIES CORP

Inventor： FELTEN EDWARD J

IPC: C22C19/00 ,  C22C19/05 ,  C23C4/08 ,  C23C10/28 ,  C23C14/14 ,  C23C30/00 ,  F01D5/28 ,  B32B15/04

CPC classification number: F01D5/288 ,  C22C19/00 ,  C22C19/058 ,  C23C30/00 ,  Y10T428/12771 ,  Y10T428/12778 ,  Y10T428/12875 ,  Y10T428/12944

Abstract: There is described nickel, cobalt and nickel-cobalt alloy coating compositions having improved hot corrosion resistance. In particular, an improved MCrAlY type alloy coating composition consists essentially of, by weight, approximately 8-30 percent chromium, 5-15 percent aluminum, up to 1 percent reactive metal selected from the group consisting of yttrium, scandium, thorium and the other rare earth elements and 3-12 percent of a noble metal selected from the group consisting of platinum or rhodium, the balance being selected from the group consisting of nickel, cobalt and nickel-cobalt.

Abstract translation: 描述了具有改善的耐热腐蚀性的镍，钴和镍钴合金涂层组合物。 特别地，改进的MCrAlY型合金涂层组合物基本上由以重量计约8-30％的铬，5-15％的铝，至多1％的选自钇，钪，钍和其他的反应性金属 稀土元素和选自铂或铑的3-12％的贵金属，余量选自镍，钴和镍钴。

公开(公告)号：CA1158075A

公开(公告)日：1983-12-06

申请号：CA230272

申请日：1975-06-26

Applicant: UNITED TECHNOLOGIES CORP

Inventor： FELTEN EDWARD J

IPC: C22C19/00 ,  C22C19/05 ,  C23C4/08 ,  C23C10/28 ,  C23C14/14 ,  C23C30/00 ,  F01D5/28

Abstract: There is described nickel, cobalt and nickel-cobalt alloy coating compositions having improved hot corrosion resistance. In particular, an improved MCrAlY type alloy coating composition consists essentially of, by weight, approximately 8-30 percent chromium, 5-15 percent aluminum, up to 1 percent reactive metal selected from the group consisting of yttrium, scandium, thorium and the other rare earth elements and 3-12 percent of a noble metal selected from the group consisting of platinum or rhodium, the balance being selected from the group consisting of nickel, cobalt and nickel-cobalt. The alloys of the present invention exhibit markedly improved hot corrosion resistance and are considered particularly useful as coatings on the contemporary superalloys. The inventive alloys are in themselves corrosion resistant and do not depend for their protective effect upon a reaction with the substrate material. In addition, these alloys are uniform throughout their thickness and thus will exhibit their protective properties more continuously and consistently than do the aluminide coatings.