Method of making graded structure composites

Details Method of making graded structure composites Method of making graded structure composites

1989-05-17

1990-03-27

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 18, 419 25, 419 49, 428547, 428552, 428610, B22F 702

Patent

active

049116258

ABSTRACT:
This case relates to tough, wear resistant graded structure composites, to a process for preparing the same and to tools and products fabricated therefrom. The composites have a surface layer e.g. of WC and a binder, an interface layer, e.g. which is a stepwise transition from the surface layer whereby the binder content thereof gradually increases, a substrate layer which is a combination of e.g. an initial high carbon steel layer and finally a base layer of bainitic steel. The composites are substantially non-porous and can be used to fabricate components such as drill bits, wear plates, pump components machine tools, seals, washers, bearings and the like.

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Sanderson et al, "High Strength 4100 . . . " Metal Powder Report, vol. 41(6), Jun. 1986, pp. 423-427.
Cottree, "An Introduction to Metallurgy", pub. by E. Arnold, 1985, 376-377; 380-383.
Cottenden et al, "Hard Metal Interlayered . . . " Metals Technology, Jun. 1981, pp. 221-233.

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