AN INVESTIGATION TO JOINING CHARACTERIZATIONS OF THREE-LAYERED SHEET OF BRASS/STEEL/BRASS MADE BY COLD ROLL-CLADDING

The cold welding by using of rolling is a process in which two different metals may joint to each other. In this study at the first, the steel and brass plates were prepared by oil cleanup and brushing processes. At the second,by putting the steel plate between brass plates and then rolling, three-ply composite brass/steel/brass with different thicknesses was produced. To examine the initial roughness and bonding strength of the three-plycomposite, samples were evaluated by topographic study and pilling test according to ASTM-D1876. Also, to analyze the effect of layer preparing method on cold welding quality, microscopic investigations were performedusing SEM. The results showed that by increasing the initial roughness of sheets, the joining strength were increased as a result of the possibility of more extrusion of brass in the steel base and The results showed that the R- 45 was lower than R0, Also the R

کلیدواژه ها:

Roughness ، three-ply composite ، bonding mechanism ، cold welding ، R - Value