The different welding parameters influencing the steel weld ability complexitydetermination study, brings us to assimilate this assembly process to a black boxwhich have several inputs such as: the welding energy (temperature) , theassemblies geometry, the filing metal and the work environment , and as foroutput, materials weld ability aptitude.Our work consists in establishing an identification temperature effect methodologyon the heat affected zone (H.A.Z.) apparition, proceeding by a local heattreatment and using characterisations means : metallography, mechanical (microhardness) and non destructive testing (ultrasonic technique).
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