Study on the Flux Compositions Used for Brass Welding by Oxy-Acetylene Flame (Report 1)

Abstract

In this paper, flux compositions used for brass welding by oxy-acetylene flame were as follows;
(1) Fused borax-boric acid system
(2) Mixed borax-boric acid system
(3) Fused borax-boric acid-sodium chloride system
(4) Fused borax-boric acid-disodiurn phosphate system
(5) Fused borax-boric acid-NaH. NH₄PO₄ system
These fluxes were applied as a paste to the welding rod, but did not painted on the surface of the parent metal.
From bead apperance, slag fluidity, porosity and mechanical properties on Vee butt joint, borax 20%, boric acid (80%) flux is excellent.
Addition sodium chloride, disodium phosphate, NaH. NH₄PO₄ to borax-boric acid flux is not advantageous.