GB837349A - Improvements in or relating to coating molybdenum and molybdenum alloys - Google Patents

Improvements in or relating to coating molybdenum and molybdenum alloys

Info

Publication number
GB837349A
GB837349A GB592/58A GB59258A GB837349A GB 837349 A GB837349 A GB 837349A GB 592/58 A GB592/58 A GB 592/58A GB 59258 A GB59258 A GB 59258A GB 837349 A GB837349 A GB 837349A
Authority
GB
United Kingdom
Prior art keywords
alloy
molybdenum
layers
coating
resistant metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB592/58A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB837349A publication Critical patent/GB837349A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/001—Interlayers, transition pieces for metallurgical bonding of workpieces
    • B23K35/005—Interlayers, transition pieces for metallurgical bonding of workpieces at least one of the workpieces being of a refractory metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/005—Selecting particular materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

A molybdenum or Mo-base alloy (e.g. 99% Mo-1% Ti), body is coated with alternate layers of a fuzed brazing alloy consisting of Cr 11-25%, Si 2-12%, Fe up to 8%, B up to 3.5%, remainder Ni and impurities, and an oxidation-resistant metal consisting of Cr or Ni-Cr alloy, the inner-most and outermost layers being of brazing alloy, and the coating having a total thickness of 5-10 mils. The brazing alloy layers should be 0.5-2 mils thick and are produced by applying a slurry consisting of, by weight, 12-55 parts finely divided alloy and 10 parts 10% aqueous CaCl2 and heating in a reducing atmosphere at 1050 DEG -1100 DEG C. to fuze the alloy, the CaCl2 acting as a flux. The oxidation resistant metal layer(s) should be 1-3 mils thick, Cr being applied by electrodeposition and Ni-Cr (e.g. 80% Ni-20% Cr), by flame-spraying. The resulting coated Mo body may be used as a bucket, blade, valve or nozzle in a gas or steam turbine or jet engine.
GB592/58A 1957-01-15 1958-01-07 Improvements in or relating to coating molybdenum and molybdenum alloys Expired GB837349A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US837349XA 1957-01-15 1957-01-15

Publications (1)

Publication Number Publication Date
GB837349A true GB837349A (en) 1960-06-15

Family

ID=22180336

Family Applications (1)

Application Number Title Priority Date Filing Date
GB592/58A Expired GB837349A (en) 1957-01-15 1958-01-07 Improvements in or relating to coating molybdenum and molybdenum alloys

Country Status (1)

Country Link
GB (1) GB837349A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995007869A1 (en) * 1993-09-14 1995-03-23 Metallwerk Plansee Gesellschaft M.B.H. Heavily thermally stressable component
DE102007016411A1 (en) * 2007-04-02 2008-10-09 Gfe Fremat Gmbh Semi-finished refractory metal product for producing ingot has protective layer giving protection against oxidation during hot deformation of semi-finished product
DE102008036070A1 (en) * 2008-08-04 2010-05-27 H.C. Starck Gmbh moldings

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995007869A1 (en) * 1993-09-14 1995-03-23 Metallwerk Plansee Gesellschaft M.B.H. Heavily thermally stressable component
DE102007016411A1 (en) * 2007-04-02 2008-10-09 Gfe Fremat Gmbh Semi-finished refractory metal product for producing ingot has protective layer giving protection against oxidation during hot deformation of semi-finished product
DE102007016411B4 (en) * 2007-04-02 2015-11-19 Gfe Fremat Gmbh Molybdenum semi-finished product provided with a protective layer and method for its production
DE102008036070A1 (en) * 2008-08-04 2010-05-27 H.C. Starck Gmbh moldings

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