Method of making composite cermet articles

Details Method of making composite cermet articles Method of making composite cermet articles

1994-12-23

1998-06-09

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264122, 419 10, 419 12, 419 13, 419 14, 419 15, 419 16, 419 17, 419 18, 419 19, 419 23, B28B 300

Patent

active

057628432

ABSTRACT:
Methods for making, methods for using and articles having cermets, preferably cemented carbides and more preferably tungsten carbide, having at least two regions exhibiting at least one property that differs are discussed. Preferably, the cermets further exhibit a portion that is binder rich and which gradually or smoothly transitions to at least a second region. The multiple-region cermets are particularly useful in compressively loaded application wherein a tensile stress or fatigue limit might otherwise be excessive for monolithic articles. The cermets are manufactured by juxtaposing and densifying at least two powder blends having different properties (e.g., differential carbide grain size, differential carbide chemistry, differential binder content, differential binder chemistry, or any combination of the preceding). Preferably, a first region of the cermet has a first ceramic component and a prescribed binder content and a second region, juxtaposing or adjoining the first region, of the cermet has a second ceramic component and a second binder content less than the prescribed binder content. The multiple region cermets of the present invention may be used in materials processing technology including, for example, compression technology, extrusion, supercritical processing, chemical processing, materials processing, and ultrahigh pressure.

REFERENCES:
patent: 2888247 (1959-05-01), Haglund
patent: 3850368 (1974-11-01), Boeckeler
patent: 3888662 (1975-06-01), Boeckeler
patent: 3909895 (1975-10-01), Abrahamson et al.
patent: 4194790 (1980-03-01), Kenny et al.
patent: 4249955 (1981-02-01), Grab et al.
patent: 4359335 (1982-11-01), Garner
patent: 4491559 (1985-01-01), Grab et al.
patent: 4610931 (1986-09-01), Nemeth et al.
patent: 4705124 (1987-11-01), Abrahamson et al.
patent: 4705512 (1987-11-01), Abrahamson et al.
patent: 4722405 (1988-02-01), Langford, Jr.
patent: 4743515 (1988-05-01), Fischer et al.
patent: 4820482 (1989-04-01), Fischer et al.
patent: 4854405 (1989-08-01), Stroud
patent: 4956012 (1990-09-01), Jacobs et al.
patent: 5074623 (1991-12-01), Hedlund et al.
patent: 5250367 (1993-10-01), Santhanam et al.
patent: 5333520 (1994-08-01), Fischer et al.
patent: 5335738 (1994-08-01), Waldenstrom et al.
patent: 5453241 (1995-09-01), Akerman et al.
patent: 5467669 (1995-11-01), Stroud
patent: 5543235 (1996-08-01), Mirchandani et al.
patent: 5593474 (1997-01-01), Keshavan et al.
Viswanadham, R. K., "Stability of Microstructural Discontinuities in Cemented Carbides," International Journal of Powder Metallurgy, Oct. 1987, USA, vol. 23, No. 4, ISSN 0361-3488, pp. 229-235.
"Cemented Carbide in High Pressure Equipment", B. Zetterlund, High Pressure Engineering, vol. 2 (1977), pp. 35-40.
"Utilization of Magnetic Saturation Measurements for Carbon Control in Cemented Carbides", D.R. Moyle & E. R. Kimmel, 1984 ASM/SCTE Conference on Technology Advancements in Cemented Carbide Production, Pittsburgh, PA 2-4 Dec. 1984, also available as Metals/Materials Technology Series No. 8415-009 (1984), pp. 1-5, American Society for Metals, Metals Park, Ohio.
"Binder Mean-Free-Path Determination in Cemented Carbide by Coercive Force and Material Composition", R. Porat & U. Malek, Materials Science and Engineering, vol. A105-106 (1988), pp. 289-292.
"Standard Practice for Evaluating Apparent Grain Size and Distribution of Cemented Tungsten Carbides", ASTM Designation B-390-92, 1992 Annual Book of ASTM Standards, vol. 02.05, pp. 156-159.
"Isotropic and Gradient Hard Metals Fabricated by Infiltration", M. Gasik, V. Jaervelae, K. Lilius & S. Stroemberg, Proceeding of the 13th International Plansee Seminar, Eds. H. Bildstein & M. Ede, Metallwerk Plansee, vol. 2 (1993), pp. 553-561.
"Processing of Functional-Gradient WC-Co Cerments by Powder Metallurgy", C. Colin, L. Durant, N. Favrot, J. Besson, G. Barbier, & F. Delannay, International Journal of Refractory Metals & Hard Materials, vol. 12, No. 3 (1993), pp. 145-152.

Affiliated with

Also associated with

Rating

Method of making composite cermet articles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making composite cermet articles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making composite cermet articles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2195297