Investigation of process an‎d heat treatment parameters on the mechanical properties an‎d microstructure of ST37 steel-1050 aluminum bimetallic sheet produced by cold rolling (CRB) method

10/15/2026 12:00:00 AM

In this study, the connection between aluminum an‎d steel was investigated using the cold roll bonding method. First, aluminum sheets were annealed at 350°C for 30 minutes an‎d steel at 750°C for 60 minutes, then acetone was used to degrease the metal surface an‎d brush it to prepare the surface of the sheets before rolling. The rolling process was carried out by reducing the thickness by 65% an‎d creating a complete connection between the sheets. Then, to create a metallurgical bond an‎d examine the effect of heat treatment, the annealing process was carried out at temperatures of 400, 450 an‎d 500 ° C for 30 an‎d 90 minutes in a resistance furnace an‎d at temperatures of 400 an‎d 500 ° C for 30 an‎d 90 minutes in an infrared furnace. In order to analyze an‎d investigate the microstructure an‎d intermetallic phases at the interface, scanning electron microscope (SEM) images were obtained along with Line Scan, Map, an‎d EDS analyses. The results showed that the intermetallic phases in the samples annealed in the infrared furnace were discontinuous an‎d thicker, an‎d these phases were rich in aluminum.Hardness, tensile an‎d peeling tests were also used to eva‎luate the mechanical properties. The results generally showed that the samples annealed in the infrared furnace, in addition to the formation of discontinuous an‎d brittle intermetallic phases at the interface, also showed the highest degree of flexibility an‎d elongation of 12%. an‎d it was seen that the tensile strength in the rolled state was the highest an‎d equal to 550 MPa. It was also seen that the hardness at the interface increased with the increase of intermetallic phases in the samples annealed in the infrared furnace an‎d showed a value of 130 Vickers. As a result, the lowest force for separating the aluminum an‎d steel layers was seen with a value of 180 Newton. Overall, the results indicate a significant effect of the type of furnace in heat treatment on the microstructure an‎d mechanical properties of steel-aluminum bimetallic products produced by cold rolling.

بي‌متال فولاد-آلومينيوم_ نورد سرد (CRB)_ عمليات حرارتي آنيل_ كوره مقاومتي_ كوره مادون قرمز_ خواص مكانيكي_ ريزساختار

Steel-aluminum bimetal_ Cold rolling (CRB)_ Annealing heat treatment_ Resistance furnace_ Infrared furnace_ Mechanical properties_ Microstructure

Tiam Atarod

Dr Hossein Razavi