Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Consolidation of powder prior to sintering
Reexamination Certificate
2011-08-09
2011-08-09
King, Roy (Department: 1733)
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Consolidation of powder prior to sintering
C419S044000, C419S036000, C419S023000, C419S032000, C419S050000, C419S053000, C419S054000, C419S058000
Reexamination Certificate
active
07993577
ABSTRACT:
The invention relates to manufacture of titanium articles from sintered powders. The cost-effective initial powder: 10-50 wt % of titanium powder having ≦500 microns in particle size manufactured from underseparated titanium sponge comprising ≦2 wt % of chlorine and ≦2 wt % of magnesium; 10-90 wt % of a mixture of two hydrogenated powders A and B containing different amount of hydrogen; 0-90 wt % of standard grade refined titanium powder, and/or 5-50 wt % of alloying metal powders. The method includes: mixing powders, compacting the blend to density at least 60% of the theoretical density, crushing titanium hydride powders into fine fragments at pressure of 400-960 MPa, chemical cleaning and refining titanium powders by heating to 300-900° C. and holding for ≦30 minutes, heating in vacuum at 1000-1350° C., holding for ≦30 minutes, and cooling.
REFERENCES:
patent: 3472705 (1969-10-01), Gregory
patent: 3950166 (1976-04-01), Obara et al.
patent: 4432795 (1984-02-01), Andersen
patent: 4838935 (1989-06-01), Dunlop et al.
patent: 5441695 (1995-08-01), Gladden
patent: 6551371 (2003-04-01), Furuta et al.
patent: 6849230 (2005-02-01), Feichtinger
patent: 2003/0211001 (2003-11-01), Ivasishin et al.
patent: 2005/0175495 (2005-08-01), Rak et al.
patent: 684978G (1995-02-01), None
patent: 58-34102 (1983-02-01), None
patent: 6-88153 (1994-03-01), None
patent: 6-92605 (1994-11-01), None
patent: 7-278609 (1995-10-01), None
patent: WO 97/01409 (1997-01-01), None
Duz Volodymyr A.
Ivasishin Orest M.
Moxson Vladimir S.
Savvakin Dmitro G.
Telin Vladislav V.
Advance Materials Products, Inc.
Buchanan & Ingersoll & Rooney PC
Kessler Christopher
King Roy
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