Totally consumable brazing encapsulate for use in joining aluminum surfaces
First Claim
1. A consumable brazing encapsulate for use in joining aluminum to metal surfaces, said encapsulate comprising a mixture of particles of an eutectic forming metal selected from the group consisting of silicon, germanium, copper and zinc and particles of a brazing flux encapsulated in a layer or layers of aluminum or its alloys, said eutectic forming metal and flux being present in the following parts by weight per 100 parts by weight of the total aluminum in the encapsulate:
- (a) 7 to 15 parts of silicon and 7 to 45 parts of flux;
(b) 25 to 120 parts of germanium and 100 to 250 parts of flux;
(c) 40 to 70 parts of copper and 20 to 100 parts of flux;
(d) 1300 to 2400 parts of zinc and 70 to 200 parts of flux;
such that when the encapsulate is placed between aluminum surfaces to be joined and is heated, the eutectic forming metal and the encapsulating aluminum are totally converted in situ into an eutectic filler metal for joining the aluminum surfaces.
1 Assignment
0 Petitions
Accused Products
Abstract
A consumable brazing encapsulate is used for joining aluminum to metal surfaces, e.g. aluminum, copper, brass or steel surfaces, by brazing. The encapsulate comprises a mixture of particles of an eutectic forming metal selected from the group consisting of silicon, germanium, copper and zinc and particles of a brazing flux encapsulated in a layer or layers of aluminum or its alloys, said eutectic forming metal and flux being present in the following parts by weight per 100 parts by weight of the total aluminum in the encapsulate: (a) 7 to 15 parts of silicon and 7 to 45 parts of flux; (b) 25 to 120 parts of germanium and 100 to 250 parts of flux; (c) 40 to 70 parts of copper and 20 to 100 parts of flux; (d) 1300 to 2400 parts of zinc and 1000 to 2000 parts of flux; such that when the encapsulate is placed between aluminum surfaces to be joined and is heated, the eutectic forming metal and the encapsulating aluminum are totally converted in situ into an eutectic filler metal for joining the aluminum surfaces. It may also be in the form of a consumable brazing laminate in which the mixture of particles are bonded to an aluminum substrate by means of a binding agent.
61 Citations
31 Claims
-
1. A consumable brazing encapsulate for use in joining aluminum to metal surfaces, said encapsulate comprising a mixture of particles of an eutectic forming metal selected from the group consisting of silicon, germanium, copper and zinc and particles of a brazing flux encapsulated in a layer or layers of aluminum or its alloys, said eutectic forming metal and flux being present in the following parts by weight per 100 parts by weight of the total aluminum in the encapsulate:
-
(a) 7 to 15 parts of silicon and 7 to 45 parts of flux; (b) 25 to 120 parts of germanium and 100 to 250 parts of flux; (c) 40 to 70 parts of copper and 20 to 100 parts of flux; (d) 1300 to 2400 parts of zinc and 70 to 200 parts of flux; such that when the encapsulate is placed between aluminum surfaces to be joined and is heated, the eutectic forming metal and the encapsulating aluminum are totally converted in situ into an eutectic filler metal for joining the aluminum surfaces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A consumable brazing laminate for use in joining aluminum to metal surfaces, said laminate comprising an aluminum or aluminum alloy substrate having bonded thereto a mixture of particles of an eutectic forming metal selected from the group consisting of silicon, germanium, copper and zinc and particles of a brazing flux, said eutectic forming metal and flux being present in the following parts by weight per 100 parts by weight of the total aluminum in the laminate:
-
(a) 7 to 15 parts of silicon and 7 to 45 parts of flux; (b) 25 to 120 parts of germanium and 100 to 250 parts of flux; (c) 40 to 70 parts of copper and 20 to 100 parts of flux; (d) 1300 to 2400 parts of zinc and 70 to 200 parts of flux; such that when the laminate is placed between aluminum surfaces to be joined and is heated, the eutectic forming metal and the aluminum substrate are totally converted in situ into an eutectic filler metal for joining the aluminum surfaces. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
-
Specification