초록 ▼

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 a

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.

대표청구항 ▼

[ What is claimed is:] [30.]30. A weldment for joining at least two pieces of aluminum to one another comprising:at least about 80% by weight aluminum;at least about 8.5% by weight copper;at most about 3.0% by weight manganese; andat most about 2.3% by weight silicon,with the remainder of the weldme

[ What is claimed is:] [30.]30. A weldment for joining at least two pieces of aluminum to one another comprising:at least about 80% by weight aluminum;at least about 8.5% by weight copper;at most about 3.0% by weight manganese; andat most about 2.3% by weight silicon,with the remainder of the weldment being immaterial, wherein the physical characteristics of the weld connection are improved.