Accession Number : AD0660292

Title :   COMPLEX CEMENTED CARBIDES FOR METAL CUTTING TOOLS.

Descriptive Note : Final rept.,

Corporate Author : LITTLE (ARTHUR D) INC CAMBRIDGE MASS

Personal Author(s) : Bovarnick,Bennett

Report Date : OCT 1967

Pagination or Media Count : 19

Abstract : A program was undertaken to develop the potential metal cutting performance which appeared to be offered by complex composite carbides obtained from fluid bed decomposition of their aqueous salt solutions to the composite powders. The work accomplished was able to verify that complex carbides of the tungsten, titanium and/or boron systems could be prepared by this process. Feed solutions of ammonium metatungstate with titanium ammonium lactate and boric acid, as appropriate, were decomposed in the fluid bed at temperatures about 900F to their corresponding composite oxides. The composite oxides were carburized to the complex carbides. Several series of experimental tools were cold pressed and sintered or hot pressed from the complex carbide powders. Improvement of properties was obtained with each successive series. Metal cutting performance of these tools showed corresponding improvement, although not attaining a level adequate for shop use. Detailed study of the experimental tool materials lead to the finding that continued process development work would be required to realize the cutting promise which is believed to be offered by the complex cemented carbides made from composite powders. (Author)

Descriptors :   (*CUTTING TOOLS, COMPOSITE MATERIALS), (*COMPOSITE MATERIALS, *CARBIDES), TUNGSTEN COMPOUNDS, TITANIUM COMPOUNDS, BORON COMPOUNDS, PREPARATION, FLUIDIZED BED PROCESSES, OXIDES, POWDERS, MATERIAL FORMING, PERFORMANCE(ENGINEERING)

Subject Categories : Industrial Chemistry and Chemical Processing
      Laminates and Composite Materials
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE