Pages: 1-11

Abstract

According to this matter that the connection of diverse metals such as AL 5A06 with 660º melting point and steel SU 321 with 1385º melting point with different thermal features like the expansion coefficient and conductivity for the connection in the fusion welding conditions causes the creation of internal pressure after the welding. Then, the connection of these two kinds of metal, despite its necessity and specific application by the fusing method, would be resulted in considerable breakdown and impairments; so, the method of soldering (arc welding) was applied with inert Argon-based shielding and with Pulse TIG machine with developed technology and application of cover of plating Zn on SU 321 and producing the galvanized steel on the steel SU 321 and for the reason of increase of the speed of soldering operations and current strength and the need to proper protection of weld, And the current intensity was not at high speeds; so, the nozzle diameter should be necessarily increased according to the increase of soldering speed and current intensity and gas flow rate. Then, it can be said that the nozzle diameter is a factor effective on providing the condition for creating the TIG soldering speed in the connection of AL 5A06 and SU 321. Taxonomy: Galvanization: cover of aluminum on steel, AL 5A06: aluminum alloy Expansion coefficient: coefficient of extensiveness, pulse: pulsed Argon: inert shielding gas, SU 321: stainless steel