Hard compositions and methods of preparation

Details Hard compositions and methods of preparation Hard compositions and methods of preparation

C - Chemistry, Metallurgy

22

C

75/166, 75/1.2

C22C 1/05 (2006.01) C22C 32/00 (2006.01)

Patent

CA 1180576

ABSTRACT OF THE DISCLOSURE Novel very hard compositions of matter are prepared by using in all embodiments only a minor amount of a particu- lar carbide (or materials which can form the carbide in situ when subjected to heat and pressure); and no stra- tegic cobalt is needed. Under a particular range of con- ditions, densified compositions of matter of the invention are prepared having hardnesses on the Rockwell A test sub- stantially equal to the hardness of pure tungsten carbide and to two of the hardest commercial cobalt-bonded tung- sten carbides. Alternately, other compositions of the invention which have slightly lower hardnesses than those described above in one embodiment also possess the advan- tage of requiring no tungsten and in another embodiment possess the advantage of having a good fracture toughness value. Photomicrographs show that the shapes of the grains of the alloy mixture with which the minor amount of carbide (or carbide-formers) is mixed are radically alter- ed from large, rounded to small, very angular by the addi- tion of the carbide. Superiority of one of these hard compositions of matter over cobalt-bonded tungsten carbide for ultra-high pressure anvil applications was demonstrated.

395081

Affiliated with

Also associated with

Rating

Hard compositions and methods of preparation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hard compositions and methods of preparation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hard compositions and methods of preparation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1314127