SINTERKARBIDKÖRPER MIT VERBESSERTEN HOCHTEMPERATUR- UND THERMO-MECHANISCHEN EIGENSCHAFTEN

According to the invention there is now provided a cemented carbide grade for rock excavation purposes with 96-88 % WC, preferably 95-91 wt-% WC with a binder phase consisting of only Co or Co and Ni, with maximum 25% of the binder being Ni, possibly with small additions of rare earth metals, for ex...

Full description

Saved in:
Bibliographic Details
Main Authors AKERMAN, JAN, ERICSON, THOMAS
Format Patent
LanguageGerman
Published 15.11.2001
Edition7
Subjects
ALLOYS
CASTING
CHEMISTRY
DREDGING
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FERROUS OR NON-FERROUS ALLOYS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
PERFORMING OPERATIONS
POWDER METALLURGY
SOIL SHIFTING
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
Online AccessGet full text

Cover

More Information
Summary:According to the invention there is now provided a cemented carbide grade for rock excavation purposes with 96-88 % WC, preferably 95-91 wt-% WC with a binder phase consisting of only Co or Co and Ni, with maximum 25% of the binder being Ni, possibly with small additions of rare earth metals, for example Ce and Y, up to max 2% of the total cemented carbide. The WC grains are rounded because of the process of coating the WC with Co, and not recrystallized or showing grain growth or very sharp cornered grains like conventionally milled WC, thus giving the bodies according to the invention surprisingly high thermal conductivity. The average grain size should be 8-30 mu m, preferably 12-20 mu m. The maximum grain size does not exceed two times the average value and no more than 2 % of the grains found in the structure are less than half of the average grain size.
Bibliography:Application Number: AT19970850111T