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US 6,316,125 B1Granted
Aluminum welding process and composition for use in same
AssigneeERICO International Corporation
InventorsNicolae Gaman, Harrie van den Nieuwelaar
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AssigneeERICO International Corporation
InventorsNicolae Gaman, Harrie van den Nieuwelaar
Estimating the term…
The invention provides a new and improved process and exothermic reaction mixture for producing molten weld metal. The molten weld metal is used in joining one metallic piece with at least one other metallic piece. The process and exothermic reaction mixture have distinct advantages over the prior art. These advantages include a higher filler metal yield, an increased tensile strength, and a higher quality corrosion resistant weld. These advantages are accomplished by a process wherein a reactant mixture is provided which has a reducing agent, a metallic compound, and at least two filler metals that at least in part do not chemically react with the metallic compound, one of which is aluminum. The metallic compound subsequently forms, with the reducing agent, having a high heat of formation which provides an exothermic reaction with sufficient heat to melt the filler metals. The reactant mixture is exothermically reacted to release heat and melt the filler metals and provide a flow of filler metals from the reactant and product mixture which may be contacted with objects to be welded by the filler metals.
A process for producing a molten weld metal aluminum/copper alloy for use in joining at least two aluminum pieces comprising:
A method of forming a weld connection of electrically conductive aluminum elements comprising the steps of forming and containing a molten weld metal to flow into contact with the aluminum elements to be joined, forming the weld metal by a contained exothermic reaction of a mixture of exothermic material, such material including powdered filler metals of conductive metal which are fused in the heat of the reaction to form an aluminum alloy for the weld joining of the aluminum elements, the balance of the reaction separating as slag.
An exothermic reaction mixture which upon initiation of an exothermic reaction forms a molten weld metal for use in joining at least two nonferrous metal pieces with one another, the exothermic reaction mixture comprising:
An exothermic reaction mixture which upon initiation of an exothermic reaction forms a molten weld metal for use in joining at least two pieces of aluminum with one another, said mixture of reactants comprising:
An exothermic reaction mixture which upon initiation of an exothermic reaction forms a molten weld metal for use in joining a non-ferrous metal piece with at least one other metal piece, the exothermic reaction mixture comprising:
An exothermic reaction mixture which upon initiation of an exothermic reaction forms a molten weld metal for use in joining a non-ferrous metal piece with at least one other metal piece, the exothermic reaction mixture comprising:
A weldment for joining at least two pieces of aluminum to one another comprising at least about 80 percent by weight aluminum, at least about 8.5 percent by weight copper, and wherein the remainder of the weldment includes manganese and silicon.
A weldment for joining at least two pieces of aluminum to one another comprising:
A weldment for joining at least two pieces of aluminum to one another comprising:
An exothermic reaction mixture which upon initiation of an exothermic reaction forms a molten weld metal for use in joining at least two nonferrous metal pieces with one another, the exothermic reaction mixture comprising:
An exothermic reaction mixture which upon initiation of an exothermic reaction forms a molten weld metal for use in joining at least two nonferrous metal pieces with one another, the exothermic reaction mixture comprising:
An exothermic reaction mixture which upon initiation of an exothermic reaction forms a molten weld metal for use in joining at least two nonferrous metal pieces with one another, the exothermic reaction mixture comprising:
An exothermic reaction mixture which upon initiation of an exothermic reaction forms a molten weld metal for use in joining at least two nonferrous metal pieces with one another, the exothermic reaction mixture comprising:
An exothermic reaction mixture which upon initiation of an exothermic reaction forms a molten weld metal for use in joining at least two nonferrous metal pieces with one another, the exothermic reaction mixture comprising:
Dependencies are inferred from the claim text.