Abstract: A recessed electrical box and bimetallic flange for attaching the box to a bulkhead plate comprising a flange having a first portion of metal compatible for welding to the box and a second portion of metal compatible for welding to the bulkhead plate wherein said first and second portions are metallurgically bonded together.

Abstract: A five-layered bonded metal product comprising a top layer of aluminum alloy, a second layer of aluminum, a third layer of titanium, a fourth layer of 70-30 copper-nickel, and a fifth layer of steel. The method of producing said multi-layered product comprises the step of explosive bonding. The invention also includes a transition joint between aluminum and steel comprising interlayers of titanium and copper-nickel.

Abstract: A three-layered explosion bonded metal product comprising a layer of steel, a layer of titanium and an interlayer of 70-30 copper-nickel between the layer of steel and the layer of titanium. A method using explosive force is provided for bonding the three layers.

Abstract: In accordance with this invention, hermetically sealed transition joint for use with a microwave package which has a receptacle including a side wall made of a first weldable material with a feed-through opening therein. The transition joint includes a first layer of a first material sized to extend across the feed-through opening and weldable to the side wall to form a hermetic seal. A second layer of a second material is explosively bonded to the first layer and sized to match and be received within the feed-through opening. A connector opening extends through the first and second layers. A pin connector unit made of the second material and having electrical pins extending therethrough is sized to fit within the connector opening and is welded to the second layer to form a hermetic seal. The first layer may be aluminum or aluminum alloy and the second layer can be any one of Kovar, cold rolled steel, stainless steel or iron-nickel alloy. Conveniently, the welding is done by laser welding.

Abstract: In accordance with this invention, a hermetically sealed transition joint for use with a microwave package which has a receptacle including a side wall made of a first weldable material with a feed-through opening therein. The transition joint includes a first layer of a first material sized to extend across the feed-through opening and weldable to the side wall to form a hermetic seal. A second layer of a second material is explosively bonded to the first layer and sized to match and be received within the feed-through opening. A connector opening extends through the first and second layers. A pin connector unit made of the second material and having electrical pins extending therethrough is sized to fit within the connector opening and is welded to the second layer to form a hermetic seal. The first layer may be aluminum or aluminum alloy and the second layer can be any one of Kovar, cold rolled steel, stainless steel or iron-nickel alloy. Conveniently, the welding is done by laser welding.

Abstract: The present invention is a package for housing microcircuit components and the method of manufacturing the same, the latter of which includes the steps of explosively bonding first and second dissimilar metals to produce a base member, machining that base member to produce a flat bottom portion with upstanding side walls defining an interior volume in the first metal, the side walls of which are surmounted by a ring formed of the second metal, whereby the said ring can be low temperature welded to a cover piece without adversely thermally affecting the metallurgical properties of the first metal.

Abstract: In one embodiment, a microwave package is constructed from a block of aluminum having layers of material clad to opposite sides thereof having a lower coefficient of thermal expansion than the aluminum block. A receptacle is formed by milling away a portion of one of the layers and a large portion of the aluminum while maintaining an aluminum base or floor within the receptacle. Ceramic substrates can be attached to the floor and connected to wires which extend through feedthrough openings either in the aluminum side walls of the receptacle or through the clad material. A cover can be hermetically attached, as by welding, to the layer of clad material to complete the microwave package assembly. An alternative form of the invention, a metal matrix material can be used which has a layer of copper or aluminum clad to the top surface. The microwave package is formed by milling away a portion of this top surface to form the container.

Abstract: A bonding and electrical grounding assembly for interconnecting dissimilar metallic components, especially in a corrosive environment, which includes a flexible first metal strap having secured to each of its ends a first metal lug for mechanical fastening to a boss which may be welded to one of the major components being bonded. The bosses are each bimetallic, the portion of the boss which is in contact with the lug being constructed of the first metal. The other portion of the boss which is to be welded to the major component is constructed of a second metal, that is the same metal as that of the component. The two dissimilar metals of each boss are directly bonded together by explosive cladding, roll-bonding, friction welding or any process which renders the bimetallic interface impervious to corrosion.

Abstract: A strong transition joint between an aluminum plate and a steel object includes an aluminum sleeve adapted to be fusion-welded to the aluminum plate and a titanium core explosion-welded to the aluminum sleeve in the center thereof with the titanium core having an internally threaded hole adapted to receive a steel bolt so that the occurance and economic consequences of corrosion are minimized.

Abstract: A method of forming a composite tube having an inner thin liner or layer of expensive material surrounded by a thick layer of less expensive material has been provided. A thin-walled tube of the expensive material is placed inside a thin-walled tube of a less expensive material and the outer tube is imploded by explosives to be metallurgically bonded to the inner tube. The composite billet thus formed is then placed within a third tube of any desired wall thickness which is of the same or similar material as the second tube. This composite is then co-extruded causing the like materials of the outer most tubes to be metallurgically bonded to each other. By this method, the relative ratios of the expensive and common materials can be selected as required by the particular use to be made of the billet and the diameters thereof can similarly be optimumly selected.