アルミニウムのガス・メタル・アーク溶接におよぼす電極線中の合金元素の影響

概要

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Using six series of aluminum-alloy electrode wires, bead-on-plate specimens were made in Ar-N_2 mixed gas atmospheres. The effects of titanium, zirconium, silicon, copper, zinc and magnesium in electrode wires on the surface appearance, depth of penetration, porosity and nitrogen content of weld metals were systematically studied. The main results obtained are as follows : (1) Al-Ti, Al-Zr, Al-Si and Al-Cu wires are prone to cause puckered welds at P_<N_2>=0.1∿0.5 atm (P_<Ar>=0.9∿0.5 atm). (2) Zinc and magnesium are effective alloying elements to prevent puckering phenomena in Ar-N_2 atmospheres. (3) Use of Al-Zn and Al-Mg wires gives rise to good profiles of penetration even in nitrogen- rich Ar-N_2 atmospheres. (4) Use of Al-Ti, Al-Zr, Al-Si and Al-Cu wires increases the porosity of aluminum welds in Ar-N_2 atmospheres. (5) The nitrogen content of weld metals decreases with increasing Ti, Zr, Si, Cu, Zn and Mg contents in electrode wires. (6) From the view point of welding process, Al-Zn or Al-Mg electrode wires are fit for the Ar-N_2 gas metalarc welding of aluminum.
社団法人溶接学会の論文
1972-06-25