Self-brazing materials for elevated temperature applications
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-015/18
B32B-015/20
B23K-035/22
출원번호
US-0976520
(2001-10-12)
발명자
/ 주소
Haynes, Gardner S.
Jha, Bijendra
Chang, Chen-Chung S.
출원인 / 주소
Engineered Materials Solutions, Inc.
대리인 / 주소
Pearne & Gordon LLP
인용정보
피인용 횟수 :
3인용 특허 :
4
초록▼
This invention describes the roll bonding of Al and Ni-bearing Cu alloys to suitable substrates to produce self-brazing materials for the elevated temperature, aggressive environment application. The Al and Ni-bearing Cu alloy for the self-brazing layers can be obtained by cladding layers of element
This invention describes the roll bonding of Al and Ni-bearing Cu alloys to suitable substrates to produce self-brazing materials for the elevated temperature, aggressive environment application. The Al and Ni-bearing Cu alloy for the self-brazing layers can be obtained by cladding layers of elemental Ni and Al to Cu. The Al content in the self-brazing layers can be varied from 2 to 100%. The Ni content in the self-brazing Cu alloy can be varied from 10 to 100%. Additional alloying elements in the commercial Cu alloys such as Fe, Cr, Si, Mn, Sn and Zn are unavoidable. Trace elements in the commercial alloys such as Pb, Ag and As will also affect the brazing and shall be reduced.
대표청구항▼
1. A method comprising the steps of making a clad self-brazing alloy by providing a base metal alloy, providing a cladding consisting essentially of copper and aluminum, and pressing said cladding to said base metal alloy to bond said cladding to and form a brazing layer on said base metal alloy, sa
1. A method comprising the steps of making a clad self-brazing alloy by providing a base metal alloy, providing a cladding consisting essentially of copper and aluminum, and pressing said cladding to said base metal alloy to bond said cladding to and form a brazing layer on said base metal alloy, said base metal ahoy having a melting point higher than said cladding, and brazing said self-brazing alloy to a metal surface at elevated temperature. 2. A method according to claim 1 wherein said pressing comprises the step of roll bonding to form a roll bonded composite. 3. A method according to claim 2, wherein said cladding is made from layers of commercially pure copper and commercially pure aluminum. 4. A method according to claim 3, wherein the thicknesses of the copper and aluminum layers are selected to produce a cladding consisting essentially of 2% aluminum to up to 100% aluminum. 5. A method according to claim 3, wherein the thicknesses of the copper and aluminum layers are selected to produce a cladding consisting essentially of 2% aluminum to 30% aluminum. 6. A method according to claim 3, wherein the thicknesses of the copper and aluminum layers are selected to produce a cladding consisting essentially of 5% aluminum and the balance copper. 7. A method according to claim 3, wherein the thicknesses of the copper and aluminum layers are 0.030″ and 0.0075″, respectively, prior to said roll bonding step. 8. A method according to claim 3, wherein the thicknesses of the copper and aluminum layers are 0.030″ and 0.012″, respectively, prior to said roll bonding step. 9. A method according to claim 3, wherein said base metal alloy is stainless steel. 10. A method according to claim 3, including the further step of cold rolling said roll bonded composite to a final gauge. 11. A method according to claim 10, wherein said final gauge is 0.017″. 12. A method according to claim 3, wherein a layer of said cladding is provided on each side of said base metal alloy. 13. A method according to claim 12, wherein an outer layer on each side of said composite is a copper layer. 14. A method according to claim 3, wherein an outer layer of said composite is a copper layer. 15. A method according to claim 14, wherein an outer layer of said composite is said base metal. 16. A method according to claim 15, wherein said base metal is stainless steel. 17. A method according to claim 3, adjacent layers of copper and aluminum being metallurgically bonded to one another. 18. A method according to claim 1, said cladding being metallurgically bonded to said base metal alloy. 19. A method comprising the steps of making a clad self-brazing alloy by providing a base metal alloy, providing a cladding consisting essentially of copper and nickel, and pressing said cladding to said base metal alloy to bond said cladding to and form a brazing layer on said base metal alloy, said base metal alloy having a melting point higher than said cladding, and brazing said self-brazing allay to a metal surface at elevated temperature. 20. A method according to claim 19, wherein said pressing comprises the step of roll bonding to form a roll bonded composite. 21. A method according to claim 20, wherein said cladding is made from layers of commercially pure copper and commercially pure nickel. 22. A method according to claim 21, wherein the thicknesses of the copper and nickel layers are selected to produce a cladding consisting essentially of 10% to up to 100% nickel. 23. A method according to claim 20, wherein the thicknesses of the copper and nickel layers are selected to produce a cladding consisting essentially of 20% to 40% nickel. 24. A method according to claim 21, wherein the thicknesses of the copper and nickel layers are selected to produce a cladding consisting essentially of 25% nickel and the balance copper. 25. A method according to claim 21 wherein the thicknesses of the copper and nickel layers are 0.030″ and 0.010& #x2033;, respectively, prior to said roll bonding step. 26. A method according to claim 1, wherein the pressing consists of the step or roll bonding said cladding to said base metal alloy to thereby metallurgically bond said cladding to said base metal alloy. 27. A method according to claim 26, further comprising the step of cold rolling said roll bonded composite to final gauge. 28. A method according to claim 1 or 19, said elevated temperature being at least 1130° C. 29. A method according to claim 1 or 19, said elevated temperature being 1130° C. 30. A method according to claim 1 or 19, said elevated temperature being at least 1200° C. 31. A method according to claim 1 or 19, said elevated temperature being 1200° C.
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이 특허에 인용된 특허 (4)
Groll William A., Method for making a copper core five-ply composite for cookware.
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