614 コルソン系銅合金における引張特性と曲げ性の面内異方性に及ぼす集合組織の影響(材料と組織)

Abstract

In recent years, higher mechanical properties are being demanded in thin sheets of copper alloys with the miniaturization of electric and electronic parts. Above all, because the materials for connector are usually subjected to heavy bending, good bending properties are especially required together with strength, electrical conductivity, etc. In this study,, effect of texture on the tensile and bending properties of a Corson series copper alloy sheets was investigated. The alloy was melted, cast, hot-rolled to 12mm thickness, scalped to 10mm thickness, cut into specimen of 30×30mm, cold-rolled to 0.3mm, cut into test pieces of 30×10mm, solution-treated at 800℃ for 1h and finally aged at 480℃ for 3h. The test pieces ware cut in the direction where the angles between the longitudinal direction, tension direction and rolling direction are O°(Good Way), 22.5°,45°,67.5°,and 90°(Bad Way). Bending properties improved while shifting from Good Way to Bad Way. In addition, texture was observed with measuring method called Schulz reflection method. As a result, Cube and Cu texture were found.