Patent ID: 6241799
Filing Date: 2001-06-05
Classification: B22F,C22C,Y10T

Abstract:
A method of cutting chip board, medium density fiberboard and particle board comprising a step of utilizing a wood cutting tool for cutting said chip board, medium density fiberboard and particle board, said wood cutting tool comprising a sintered cemented carbide alloy having improved corrosion and oxidation resistance, said alloy comprising at least 96 weight-% hard material comprising WC in a monophase binder phase based on Ni and/or Co, said binder phase comprising in solution, in weight-%, Co max 90, Ni max 90, Cr 3-15, W max 30, Mo max 15, the total carbon content, in weight-%, is 6.13-(0.061.+-.A).times.(100 minus hard material in weight-%) for concentrations of Mo+Cr between 3-15 weight-% where A=0.005 to 0.008 and 6.13-(0.058.+-.B).times.(100-hard materials in weight-%) for concentrations of Mo+Cr between 16-30 weight-% where B=0.005 to 0.007, the mean grain size of WC being .ltoreq.0.7 .mu.m, and the alloy optionally containing up to 0.8% each of VC and ZrN.