US3272624A - Lithium-aluminum base filler alloy with optional silicon - Google Patents

Lithium-aluminum base filler alloy with optional silicon Download PDF

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Publication number
US3272624A
US3272624A US282567A US28256763A US3272624A US 3272624 A US3272624 A US 3272624A US 282567 A US282567 A US 282567A US 28256763 A US28256763 A US 28256763A US 3272624 A US3272624 A US 3272624A
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United States
Prior art keywords
lithium
aluminum base
filler alloy
base filler
alloy
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US282567A
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Joseph F Quaas
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Eutectic Corp
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Eutectic Welding Alloys Corp
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Priority to US282567A priority Critical patent/US3272624A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al as the principal constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent

Definitions

  • An object of this invention is to provide a self-fluxing type of aluminum base joining and filling alloy.
  • an aluminum filler alloy includes an amount of lithium ranging from 0.005 to 0.010% by weight which deoxidizes the deposited alloy system, actively fluxes the parent material during deposition and improves its wettability and the fluidity of the deposit. Amounts of silicon ranging from zero to 18% by weight may also be added to improve the aforementioned depositing action.
  • An aluminum base filler alloy consisting essentially of from 0.005 to 0.010 percent by weight of lithium and the balance aluminum.
  • the aluminum base filler alloy of claim 1 which contains additionally up to 18 percent by weight of silicon.
  • a filler alloy as set forth in claim 1 including 01-18% by Weight of silicon.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cookers (AREA)

Description

United States Patent ice 3,272,624 LITHIUM-ALUMINUM BASE FILLER ALLOY WITH OPTIONAL SILICON Joseph F. Quaas, Island Park, N.Y., assignor to Eutectic Welding Alloys Corporation, a corporation of New York No Drawing. Filed May 23, 1963, Ser. No. 282,567 3 Claims. (Cl. 75-138) This invention relates to an aluminum alloy for joining and filling applications and it more particularly relates to a self-fluxing form of such an alloy. No flux coated aluminum base alloys are available for joining and filling purposes because the available fluxes are so reactive that they would prohibitively shorten shelf life. Conventional separately applied fluxes for depositing aluminum include chlorides and fluorides which must be completely removed from the joint area to prevent serious corrosion.
An object of this invention is to provide a self-fluxing type of aluminum base joining and filling alloy.
In accordance with this invention an aluminum filler alloy includes an amount of lithium ranging from 0.005 to 0.010% by weight which deoxidizes the deposited alloy system, actively fluxes the parent material during deposition and improves its wettability and the fluidity of the deposit. Amounts of silicon ranging from zero to 18% by weight may also be added to improve the aforementioned depositing action.
The aforementioned ranges and some examples of this invention are recited in the following table:
Range in Examples Constituents Percent by Weight Lithium 0. 00m. 010 0. 075 0. 075 0. 010 Silicon 0-18. 0 0 5 Aluminum Balance Balance Balance Balance 3,272,624 Patented Sept. 13, 1966 This filler alloy can be extruded in wire form or cast in molds in diameters ranging from to It can be applied by many conventional processes including carbon arc, oxy-acetylene and inert arc. The lithium additive makes the deposited alloy remarkably self-fluxing and deoxidizing. The lithium oxide formed during deposition also highly promotes fluidity and wettability. The labor saved in avoiding the necessity of applying a corrosive flux and removing it is highly significant because even with the utmost of care it is extremely ditficult to remove all flux residues from .the joint area. These flux residues of the chloride and fluoride type are extremely corrosive and require thorough cleaning in a hot water solvent and subsequent neutralization, such as by application of bicarbonate of soda.
What is claimed is:
1. An aluminum base filler alloy consisting essentially of from 0.005 to 0.010 percent by weight of lithium and the balance aluminum.
2. The aluminum base filler alloy of claim 1 which contains additionally up to 18 percent by weight of silicon.
3. A filler alloy as set forth in claim 1 including 01-18% by Weight of silicon.
References Cited by the Examiner UNITED STATES PATENTS 3,073,720 1/1963 Mets 138 3,081,534 3/1963 Bredzs 75-148 FOREIGN PATENTS 629,048 9/ 1949 Great Britain.
DAVID L. RECK, Primary Examiner.
R. O. DEAN, Assistant Examiner.

Claims (1)

1. AN ALUMINUM BASE FILLER ALLOY CONSISTING ESSENTIALLY OF FROM 0.005 TO 0.010 PERCENT BY WEIGHT OF LITHIUM AND THE BALANCE ALUMINUM.
US282567A 1963-05-23 1963-05-23 Lithium-aluminum base filler alloy with optional silicon Expired - Lifetime US3272624A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2143965A1 (en) * 1971-09-02 1973-04-26 Vaw Ver Aluminium Werke Ag SOLDER FOR FLUX-FREE SOLDERING OF ALUMINUM MATERIALS
FR2190930A1 (en) * 1972-07-05 1974-02-01 Nat Res Inst Metals Lithium addn to aluminium - to prevent porosity in casting or welding
US4173302A (en) * 1969-12-15 1979-11-06 Vereinigte Aluminium-Werke Aktiengesellschaft Process and alloy for brazing aluminum-containing articles
US5422191A (en) * 1994-02-14 1995-06-06 Kaiser Aluminum & Chemical Corporation Aluminum-lithium filler alloy for brazing
US5728479A (en) * 1995-11-03 1998-03-17 Childree; David L. Aluminum-lithium-magnesium filler alloy for brazing
US5971258A (en) * 1994-02-14 1999-10-26 Kaiser Aluminum & Chemical Corporation Method of joining aluminum parts by brazing using aluminum-magnesium-lithium-filler alloy

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB629048A (en) * 1947-10-21 1949-09-09 British Oxygen Co Ltd Improvements in or relating to brazing aluminium or aluminium alloys
US3073720A (en) * 1960-03-23 1963-01-15 Gen Electric Method of protecting metal from corrosion
US3081534A (en) * 1960-11-18 1963-03-19 Armour Res Found Aluminum base brazing alloy

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB629048A (en) * 1947-10-21 1949-09-09 British Oxygen Co Ltd Improvements in or relating to brazing aluminium or aluminium alloys
US3073720A (en) * 1960-03-23 1963-01-15 Gen Electric Method of protecting metal from corrosion
US3081534A (en) * 1960-11-18 1963-03-19 Armour Res Found Aluminum base brazing alloy

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173302A (en) * 1969-12-15 1979-11-06 Vereinigte Aluminium-Werke Aktiengesellschaft Process and alloy for brazing aluminum-containing articles
DE2143965A1 (en) * 1971-09-02 1973-04-26 Vaw Ver Aluminium Werke Ag SOLDER FOR FLUX-FREE SOLDERING OF ALUMINUM MATERIALS
FR2190930A1 (en) * 1972-07-05 1974-02-01 Nat Res Inst Metals Lithium addn to aluminium - to prevent porosity in casting or welding
US5422191A (en) * 1994-02-14 1995-06-06 Kaiser Aluminum & Chemical Corporation Aluminum-lithium filler alloy for brazing
WO1995021741A1 (en) * 1994-02-14 1995-08-17 Kaiser Aluminum & Chemical Corporation Aluminum-lithium filler alloy for brazing
US5535939A (en) * 1994-02-14 1996-07-16 Kaiser Aluminum & Chemical Corporation Controlled atmosphere brazing using aluminum-lithium alloy
US5564619A (en) * 1994-02-14 1996-10-15 Kaiser Aluminum & Chemical Corporation Method of joining aluminium parts by brazing
US5971258A (en) * 1994-02-14 1999-10-26 Kaiser Aluminum & Chemical Corporation Method of joining aluminum parts by brazing using aluminum-magnesium-lithium-filler alloy
US5728479A (en) * 1995-11-03 1998-03-17 Childree; David L. Aluminum-lithium-magnesium filler alloy for brazing

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