再颁专利
- 专利标题: Hardfacing composition for earth-boring bits
- 专利标题(中): 用于钻孔钻头的表面硬化组合物
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申请号: US09137254申请日: 1998-08-19
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公开(公告)号: USRE37127E1公开(公告)日: 2001-04-10
- 发明人: Kevin W. Schader , James L. Overstreet , Alan J. Massey , Ronald L. Jones , Danny E. Scott
- 申请人: Kevin W. Schader , James L. Overstreet , Alan J. Massey , Ronald L. Jones , Danny E. Scott
- 主分类号: C22C2900
- IPC分类号: C22C2900
摘要:
A hardfacing composition comprises at least 60% by weight of hard metal granules including a quantity of sintered carbide pellets and a quantity of cast carbide pellets. The cast and sintered carbides are selected from the group of carbides consisting of chromium, molybdenum, niobium, tantalum, titanium, tungsten, and vanadium carbides and alloys and mixtures thereof. The balance of the hardfacing composition is matrix metal with traces of flux or deoxidizer, and alloying elements. All percentages given are pre-application ratios.
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