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An x-ray diffraction investigation of heat-treated WC-Co sintered carbides

Journal Article · · Sov. Powder Metall. Met. Ceram. (Engl. Transl.); (United States)
DOI:https://doi.org/10.1007/BF00813964· OSTI ID:6837300
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This work presents the results of an x-ray diffraction investigation of the microstructure of WC-Co sintered carbides after hardening under different conditions. The materials studied were medium grain alloys with 6.15 and 25 wt. % cobalt. A portion of the specimens was hardened under different conditions differing in temperature and hold time. The heating was done in a salt bath. The specimens were annealed in vacuum at 1373 K for 2 h. Hardening of sintered carbides from 1300 K and more may lead to a change in the phase composition of the alloy under conditions of long holds at the hardening temperature. With an increase in hardening temperature there is an increase in the solubility of tungsten in the binder phase and an increase in stresses in the carbide and cobalt phases. The optimum heat-treatment cycle for sintered carbides corresponds to the maximum solubility of tungsten in cobalt with the minimum change in phase composition and stressed state of the phase. Tables are included.
Research Organization:
Institute of Superhard Materials, Ukrainian SSR Acad. of Sci.
OSTI ID:
6837300
Journal Information:
Sov. Powder Metall. Met. Ceram. (Engl. Transl.); (United States), Journal Name: Sov. Powder Metall. Met. Ceram. (Engl. Transl.); (United States) Vol. 25:5; ISSN SPMCA
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALLOYS
ANNEALING
CARBIDES
CARBON COMPOUNDS
COBALT ALLOYS
COHERENT SCATTERING
DIFFRACTION
FABRICATION
HARDENING
HEAT TREATMENTS
MATERIALS
OPTIMIZATION
REFRACTORY METAL COMPOUNDS
RESIDUAL STRESSES
SCATTERING
SINTERED MATERIALS
SINTERING
SOLUBILITY
STRESSES
TEMPERATURE EFFECTS
THERMAL STRESSES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN CARBIDES
TUNGSTEN COMPOUNDS
X-RAY DIFFRACTION