Multiple grade cemented carbide articles and a method of making

Details Multiple grade cemented carbide articles and a method of making Multiple grade cemented carbide articles and a method of making

1994-04-26

1996-08-06

Jordan, Charles T.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428551, 428552, 428553, 428558, 419 5, 419 10, 419 14, 419 38, B22F 312, B22F 706

Patent

active

055432352

ABSTRACT:
The present invention provides multiple grade, composite cemented carbide articles and a method of making such articles. The cemented carbide articles comprise carbides of different grades (or different compositions and/or microstructures) and, therefore, correspondingly different properties at different locations in the same article. The method of the present invention comprises filling different areas or portions of a die with metallurgical powders having different compositions and/or microstructures. The powder is then compressed as a single compact in the die cavity. The compressed compact is subsequently sintered to produce a multigrade cemented carbide article having composition and/or microstructural variations within the volume of the article.

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"Rock Tools leads the way in drilling," MPR Dec. 1992, pp. 48-50.

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