اميرحسين دهستاني منفرد

Given the advancements in various industries, the use of metal sheets with two or more layers has gained significant attention due to benefits such as higher strength-to-weight ratio, improved formability, increased corrosion resistance. In particular, the use of stainless steel-carbon steel bi-layer sheets as a substitute for pure stainless steel is being explored to reduce corrosion compared to carbon steel and to lower material costs relative to stainless steel. This has led to extensive research on the forming and examination of the mechanical and metallurgical properties of these bi-layer metal sheets.In this study, the existing methods for joining two sheets, particularly stainless steel to carbon steel, were considered. Then, the hot-rolling bonding process was used to join two sheets of the mentioned materials. After reducing the thickness, mechanical properties were eva‎luated through tensile tests, Vickers hardness, Nakazima tests, and metallurgical properties were analyzed using scanning electron microscopy (SEM) and optical microscopy. The results indicate that the bonding of these sheets was successful, with the ultimate tensile strength reaching 1086 MPa, which represents an approximately 100% increase compared to the base sheets after rolling. Additionally, the formability limit diagram of these sheets was extracted, a factor that was not considered in previous research.Furthermore, annealing was performed on these sheets, and its impact on mechanical and metallurgical properties was examined. The annealing process increased the bonding layer from 28 micrometers to 37 micrometers and reduced hardness in different layers of the sheet. This thermal treatment also enhanced formability in both uniaxial and biaxial stretching processes.

Two-layer sheet , Multilayer-metal composites , Stainless steel-carbon steel , Bonding of multi-layer sheets , formability

ورق هاي دولايه , كامپوزيت¬هاي لايه¬اي فلزي , فولاد ضدزنگ-فولاد كربني , اتصال ورق هاي چند لايه , شكل پذيري

Amirhossein Dehestani monfared

Ramin Hashemi