Metal treatment – Compositions – Fluxing
Patent
1981-12-30
1984-03-13
Rosenberg, Peter D.
Metal treatment
Compositions
Fluxing
148 26, B23K 3534
Patent
active
044365624
ABSTRACT:
Basic bonded fluxes for submerged arc welding consisting of a mixture of a slag forming composition, a gas forming composition and metal powders, in which a volume contraction of the weld slag is remarkable in the cooling process after the solidification of the weld slag and the removal of slag in the groove is easy, contain 5 to 20% by weight of BaO, not more than 10% by weight of CaO, 20 to 50% by weight of MgO, 6 to 25% by weight of SiO.sub.2, 3 to 15% by weight of Al.sub.2 O.sub.3 and 7 to 18% by weight of CaF.sub.2 as the slag forming composition, a value of basicity shown by a ratio of the basic component and the acidic component being 2.3 to 4.5, the above described contents of BaO, CaO and MgO including amounts corresponding to the values obtained by calculating an amount of carbonates of these metals which are incorporated as the gas forming composition, as oxides and further contain 10 to 60% by weight of metal carbonates as the gas forming composition.
REFERENCES:
patent: 3184345 (1965-05-01), Kerekes
patent: 3959031 (1976-05-01), More
Hirai Yukio
Tokuhisa Masaaki
Kawasaki Steel Corporation
Rosenberg Peter D.
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