Patent ID: 9636800
Date: 2017-05-02
CPC Classifications: B22F,B24D,C22C

Claim:
1. A process for producing a cubic boron nitride (CBN) compact that consists of a polycrystalline mass of CBN particles present in an amount of at least 70 percent by volume and a binder, said method comprising subjecting a composition consisting of particulate CBN particles and the binder in particulate form to elevated temperature and pressure conditions suitable to produce the compact, wherein the binder consists of an alloy consisting of at least 40 percent by weight of one or more of a first element selected from the group consisting of nickel, iron and cobalt and the balance of the alloy containing two or more of a second element selected from the group consisting of chromium, molybdenum, tungsten, lanthanum, cerium, yttrium, niobium, tantalum, zirconium, vanadium, hafnium, aluminium and titanium, the cumulative weight percentage of the two or more of a second element being 5 to 60 percent by weight, wherein the first element and the second element have a metallic character that persists as an alloy in the binder of the CBN compact that is produced.