The Role of tantalum in TiC-WC-TaC-Co sintered carbides. II. influence of tantalum content on the structure and properties of TiC-WC-TaC-Co three-phase sintered carbides

Journal Article · Wed Oct 01 04:00:00 EDT 1986 · Sov. Powder Metall. Met. Ceram. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF00813963· OSTI ID:7122693

Cheburaeva, R F; Chaporova, I N

This work is devoted to a study of the influence of tantalum on the structure and properties of three-phase alloys. The investigations were made with a constant weight ratio of Ti:WC = 35:65% and an unchanged carbon content. The alloys were prepared by mixing of the (T, W, Ta)C carbides with cobalt and tungsten carbide. The pressed specimens were given a preliminary sinter in hydrogen at 923-973 K and a final one in a vacuum furnace at 1773 K. The microstructure, density, and bend and compressive strengths at room and increased temperatures, coeffiecients of cutting life and strength (in comparison with a standard taken as unity), and adhesion interaction were determined. The coefficient of cutting life was determined by transverse machining of steel. The coefficient of strength was determined by the method of breaking feed in milling of 50 steel with a single-tooth cutter. The adhesion interaction of TiC-WC-TaC-Co alloys with the material being machined (50 steel) was determined in vacuum (which eliminated the additional influence of oxidation of the alloy) at 873 K with a load of 1000N. Tantalum carbide additions have a favorable influence on the physicomechanical and service properties of TiC-WC-Co alloys. Their bend strength at room and increased temperatures increases and there is an increase in the total deformation and the work for deformation at increased temperatures, a reduction in oxidation and adhesion interaction with the material being machined, and a significant increase in wear resistance in cutting. Graphs and tables are included.

• Research Organization: All-Union Sci-Res. and Design Institute for Refractory Metals
• OSTI ID: 7122693
• 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

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ADHESION
ALLOYS
CARBIDES
CARBON COMPOUNDS
COBALT ALLOYS
COMPRESSION STRENGTH
CORROSION RESISTANCE
CRYSTAL STRUCTURE
ELEMENTS
FABRICATION
FLEXURAL STRENGTH
MATERIALS TESTING
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
MICROSTRUCTURE
REFRACTORY METAL COMPOUNDS
SINTERING
TANTALUM
TANTALUM CARBIDES
TANTALUM COMPOUNDS
TESTING
TITANIUM CARBIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TUNGSTEN CARBIDES
TUNGSTEN COMPOUNDS
WEAR RESISTANCE