Indium-containing silver-copper-zinc brazing alloy
First Claim
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1. A brazed joint comprising at least a pair of metal parts joined together by a filler metal comprising an indium-containing silver brazing alloy consisting essentially by weight of about 40% to 65% Ag, about 6 to 12% In, about 6 to 12% Zn, up to about 0.5% Si and the balance essentially copper ranging from about 23% to 36%.
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Abstract
A filler metal composition and method are provided for producing strong brazed joints between metal parts, e.g. steel parts, assembled in joint-forming relationship with each other, the filler metal comprising an indium-containing silver brazing alloy consisting essentially by weight of about 30% to 70% Ag, about 3% to 20% In, about 3% to 20% Zn, up to about 0.5% Si and the balance essentially copper.
15 Citations
3 Claims
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1. A brazed joint comprising at least a pair of metal parts joined together by a filler metal comprising an indium-containing silver brazing alloy consisting essentially by weight of about 40% to 65% Ag, about 6 to 12% In, about 6 to 12% Zn, up to about 0.5% Si and the balance essentially copper ranging from about 23% to 36%.
- 2. A method of brazing metal parts together which comprises, assembling said metal parts in joint-forming relationship with each other with a filler metal disposed in brazing proximity thereto, said filler metal comprising an indium-containing silver brazing alloy consisting essentially by weight of about 40% to 65% Ag, about 6 to 12% In, about 6 to 12% Zn, up to about 0.5% Si and the balance essentially copper ranging from about 23% to 36%, applying heat to said joint-forming assembly to preheat the same and heat said filler metal sufficient to melt said filler metal and cause it to flow in and about the joint-forming portion of said assembly and then allowing the molten filler metal to solidify and form a strong joint between said metal parts.
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Current AssigneeEutectic Corp. (Messer Cutting Systems GmbH)
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Original AssigneeEutectic Corp. (Messer Cutting Systems GmbH)
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InventorsSimm, Wolfgang, Steine, Hans T., Quaas, Joseph F.
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Primary Examiner(s)Steiner, Arthur J.
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Application NumberUS05/604,831Time in Patent Office782 DaysField of Search228/263, 75/134 T, 75/134 C, 75/134 N, 75/173 C, 75/157.5, 75/160, 29/194, 29/199, 428/673US Class Current428/673CPC Class CodesB23K 35/3006 Ag as the principal constit...B23K 35/302 Cu as the principal constit...Y10T 428/12896 Ag-base component
