Investigation on A-۵۱۷ GTAW Cladding Effect on Mechanical Properties and Weldability by Stainless Steel Filler Metal

A-۵۱۷ steel is a low-alloy quench-tempered steel with high strength. This steel finds application in the shipbuilding, boiler, and marine industries. Weldability is generally one of the key factors to consider when selecting raw materials for the construction of an engineering structure. One criterion for weldability was the hardness of the weld and the surrounding regions. In this work, the AISI ۴۲۰ martensitic stainless-steel cladded over the A-۵۱۷ by GTAW. The cladded samples were prepared in three types of As-Weld, heat treatment at ۲۰۰ and ۳۰۰ degrees. Subsequently, several samples of the Austenitic stainless steel ۴۳۰ cladded over the A-۵۱۷ by GTAW were prepared in three types of As-Weld, heat treatment at ۲۰۰ and ۳۰۰ degrees for tensile testing and comparison with AISI ۴۲۰. AISI ۴۲۰ martensitic stainless-steel has a higher weldability than the A-۵۱۷ steel. Analysis of the four butt-joint sections of the welded sheets was demonstrated Weldability in the cladded sample is improved compared to the not cladded sample. The results obtained from the pressure test show that the compressive strength has increased slightly. The welding distortion in different lines (A-G) for cladded sample was studied. Tension strength of sample cladded by martensitic stainless steel ۴۲۰ and elongation of the A-۵۱۷ sheet metal cladded by stainless steel austenite ۴۳۰ were increased.

Keywords:

Weldability , martensitic stainless steel AISI ۴۲۰ , GTAW , Distortion , austenitic stainless steel AISI ۴۳۰