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Xin Qiao Deceased8 Captain Parker Arms, Lexington, MA 02421

Xin Qiao Phones & Addresses

8 Captain Parker Arms, Lexington, MA 02421    781-6520597   

2649 Fieldview Dr, Macungie, PA 18062    610-9665709   

900 Mickley Ave, Whitehall, PA 18052    610-4333617   

Lehighton, PA   

Boise, ID   

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Xin Qiao

Location:
United States

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Us Patents

Variable Melting Point Solders And Brazes

US Patent:
6613123, Sep 2, 2003
Filed:
May 24, 2001
Appl. No.:
09/863763
Inventors:
Stephen F. Corbin - Waterloo, Ontario, ,
Douglas J. McIsaac - Waterloo, Ontario, ,
Xin Qiao - Boise ID,
International Classification:
B22F 100
US Classification:
75255, 75245, 148 24, 252513, 252514, 2525181, 2525201
Abstract:
Variable melting point solders and brazes having compositions comprising a metal or metal alloy powder having a low melting point with a metal powder having a higher melting point. Upon heating, in-situ alloying occurs between the low and high melting point powders such that solidification occurs at the solder or braze temperature thus creating a new, higher solidus (or melting) temperature with little or no intermetallic formation. A solder comprising Sn powder mixed with a Sn—Bi eutectic powder having a composition of 63 wt % Sn:57 wt % Bi such that the bulk composition of the mixture is 3 wt % Bi has an initial melting point of 140° C. and a re-melt temperature of 220° C. after heating due to in-situ alloying. A composition of Pb powder mixed with a Pb—Sn eutectic powder having a composition of 62 wt % Sn:58 wt % Pb such that the bulk composition of the mixture is 15 wt % Sn has an initial melting point of 183° C. and a re-melt temperature of 250° C.

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