Influence of temperature on formability of steel-plastic laminates: Formability of steel sheets under cold working temperatures IV

摘要

Uniaxial tensile tests, square cup deep drawing tests and spherical punch stretching tests for FLD (forming limit diagram) are carried out at temperatures ranging from - 30℃ to 100℃. The bonding strength of resin under shear deformation isincreased with decreasing ambient temperature. Under the chill working temperatures from - 30℃ to 0℃, if the elongation of core resin is larger than that of skin steel, the high bonding strength is very effective for increasing deep drawability. On theother hand, if the reverse relationship of these elongations, which occurs in steel-plastic laminates with brittle core resin such as nylon 6 (polyamide), deep drawability and FLD decrease in the above chill working temperature range, even though the core resin has high bonding strength.