Cored type electrode welding
AssigneeThe Lincoln Electric Company
InventorsJohn Gonzalez, Robert P. Munz
Life of this patent
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Abstract
A cored type arc-welding steel electrode for the welding of 14 gauge to 3/8 inch thick mild steel wherein the ingredients in the core provide a smooth spray arc that is easy to control along with excellent bead appearance, low spatter, and good slag removal. The core ingredients include: calcium oxide, as a necessary compound, in a prefused mix to lower its hygroscopicity; aluminum and magnesium in controlled amounts; and selected fluorides.
Claims17
In a cored type steel electrode suitable for arc welding in air without a shielding gas consisting of the following ingredients in weight percent of the total electrode:
- a - Aluminum 1.7 to 4.0 b - Magnesium 0.5 to 0.8
- c. one or more fluorides selected from the class consisting of:
- Barium fluoride, Strontium
- fluoride, Lanthanum
- fluoride and the rare earth
- fluorides 2.0 to 4.5
- d. one or more oxides selected from the class consisting of:
- Silicon dioxide, iron
- oxide and manganese oxide 0.25 to 0.4
- e - Calcium oxide 0.5 to 0.8 f - Lithium fluoride 0.0 to 0.3 g - Carbon 0.0 to 0.4 h - Manganese metal 0.0 to 4.0
- i. The balance being Iron powder and a steel tube,
- j. The improvement which comprises:
- the calcium being present in a prefused composite with the selected oxide(s) and the selected fluoride(s).
An arc welding electrode for mild steel comprised of a steel tube having flux materials on the inside thereof, said flux materials containing aluminum and as an essential ingredient:
- a fused composite consisting of calcium oxide and one or more compounds selected from the class consisting of silicon dioxide, iron oxide, and one or more fluorides selected from the class consisting of:
- Barium fluoride,
- Strontium fluoride,
- Lanthanum fluoride, and
- Rare earth fluorides
In an arc welding electrode for welding mild steel in air comprised of a steel tube having on the inside thereof fluxing ingredients, the improvement which consists in said ingredients including aluminum and as an essential ingredient, a prefused composite consisting of:
- calcium oxide;
- one or more metal compounds selected from the class consisting of:
- silicon dioxide, manganese oxide, and iron oxide, and, one or more compounds selected from the class consisting of:
- barium fluoride, strontium fluoride, lanthanum fluoride and the rare earth fluorides.
A cored type steel electrode suitable for arc welding in air without a shielding gas consisting of the following ingredients in weight percent of the total electrode:
- a. Aluminum 1.7 to 4.0 b. Magnesium 0.5 to 0.8
- c. a fluoride selected from the class consisting of:
- Barium fluoride,
- Strontium fluoride,
- Lanthanum fluoride,
- Rare earth fluorides 2.0 to 4.5
- d. A metal oxide selected from the class consisting of:
- Silicon dioxide, iron oxide and[/or] manganese oxide 0.25 to 0.4 e. Calcium oxide 0.5 to 0.8 f. Lithium fluoride 0.0 to 0.3 g. Carbon 0.0 to 0.4 h. Manganese metal 0.0 to 4.0 i. Iron powder and Steel Tube Balance
- j. said calcium oxide being present as a prefused composite with at least one of the selected oxides.
In an arc welding electrode for welding mild steel in air comprised of a steel tube having on the inside thereof fluxing ingredients including aluminum, the improvement which comprises:
- said ingredients including as an essential ingredient, a prefused composite consisting of:
- calcium oxide and one or more metal oxides selected from the class consisting of:
- silicon dioxide, manganese oxide, and iron oxide.
Dependencies are inferred from the claim text.