CEMENTED CARBIDE AND PROCESS FOR PRODUCING SAME

专利名称：CEMENTED CARBIDE AND PROCESS FOR

PRODUCING SAME

发明人：Igor Yuri Konyashin,Bernd Heinrich

Ries,Frank Friedrich Lachmann

申请号：US13500072申请日：20101115

公开号：US20120210822A1公开日：20120823

专利附图：

摘要：The present invention relates to a cemented carbide comprising WC grains, 3-20wt. % binder selected from Co or Co and Ni and grain growth inhibitors wherein the WC

mean grain size lies in the range of 180 nm and 230 nm, at least 10±2% WC grains arefiner than 50 nm and 7±2% WC grains have a size from 50 to 100 nm. The inventionfurther relates to a process for production the cemented carbide including the stages ofmilling WC powder with specific surface area (BET) of 3.0 m/g or higher with binder andgrain-growth inhibitors; pressing green parts; pre-sintering the green parts in H2 at 400°C. to 900° C. for 5 to 30 min; sintering in vacuum at temperatures of 1340° C. to 1410° C.for 3 min to 20 min; and HIP-sintering in Ar at pressures of 40 to 100 bar at temperaturesof 1340° C. to 1410° C. for 1 to 20 min

申请人：Igor Yuri Konyashin,Bernd Heinrich Ries,Frank Friedrich Lachmann

地址：Huenfeld DE,Huenfeld DE,Burchaun DE

国籍：DE,DE,DE

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