发明授权
- 专利标题: Refractory metal and alloy refining by laser forming and melting
- 专利标题(中): 耐火金属和合金精炼通过激光成形和熔化
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申请号: US10501837申请日: 2003-01-22
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公开(公告)号: US07651658B2公开(公告)日: 2010-01-26
- 发明人: Paul R. Aimone , Prabhat Kumar , Peter R. Jepson
- 申请人: Paul R. Aimone , Prabhat Kumar , Peter R. Jepson
- 申请人地址: US MA Newton
- 专利权人: H.C. Starck Inc.
- 当前专利权人: H.C. Starck Inc.
- 当前专利权人地址: US MA Newton
- 代理机构: Connolly Bove Lodge & Hutz LLP
- 国际申请: PCT/US03/01825 WO 20030122
- 国际公布: WO03/062491 WO 20030731
- 主分类号: B22F5/00
- IPC分类号: B22F5/00 ; B23K26/32
摘要:
A process to chemically refine and consolidate tantalum, niobium and their alloys to a fabricated product of net shape or near-net shape with higher throughput, more consistency, and lower manufacturing costs compared to prior art routes or rejuvenate damaged and deteriorated refractory metal parts. Powder metal is loaded into hoppers to be fed into laser forming/melting equipment. A suitable substrate is loaded into a laser forming/melting chamber onto which the powder will be deposited and consolidated in a point-scan process. As the powder is fed onto successive points of the surface of the substrate in linear traces, the laser is used to heat and partially melt the substrate and completely melt the powder. A combined deposition and melt beam traces the substrate surface repeatedly over a selected area to build up a dense coating of controlled microstructure in multiple layers. A fully dense deposit is built up that becomes the desired shape.
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