发明名称 |
ULTRACOARSE, MONORYSTALLINE TUNGSTEN CARBIDE AND METHOD FOR PRODUCING THE SAME, AND HARD METAL PRODUCED THEREFROM |
摘要 |
The invention relates to a method for producing tungsten and/or molybdenum metal powder or carbide by reducing and optionally carburizing tungsten and/or molybdenum oxide powder in the presence of alkali metal compounds. At least two alkali metal compounds are used in such a proportion that any mixed alkali tungstate or mixed alkali molybdate ((Li, Na, K)2WOZ, (Li, Na, K)2MoOZ) possibly produced as an intermediate has a melting point of less than 550 DEG C. |
申请公布号 |
WO0220403(A1) |
申请公布日期 |
2002.03.14 |
申请号 |
WO2001EP09770 |
申请日期 |
2001.08.24 |
申请人 |
H.C. STARCK GMBH;BREDTHAUER, JOERG;GRIES, BENNO;SZESNY, BERNHARD |
发明人 |
BREDTHAUER, JOERG;GRIES, BENNO;SZESNY, BERNHARD |
分类号 |
B22F1/00;B22F9/20;B22F9/22;C01B31/34;C22B5/04;C22B34/34;C22B34/36;C30B29/36 |
主分类号 |
B22F1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|