摘要:
A copper-zinc alloy product of the invention contains zinc in an amount of higher than 35% by weight and 43% by weight or less and has a two-phase structure of an α-phase and a β-phase. Further, the ratio of the β-phase in the copper-zinc alloy is controlled to be higher than 10% and less than 40% and the crystal grains of the α-phase and the β-phase are crushed into a flat shape and arranged in a layer shape through cold working. According to the copper-zinc alloy product, it is possible to decrease the copper content and to appropriately secure the strength and cold workability by appropriately controlling the ratio of the β-phase.
摘要:
A copper-zinc alloy product of the invention contains zinc in an amount of higher than 35% by weight and 43% by weight or less and has a two-phase structure of an α-phase and a β-phase. Further, the ratio of the β-phase in the copper-zinc alloy is controlled to be higher than 10% and less than 40% and the crystal grains of the α-phase and the β-phase are crushed into a flat shape and arranged in a layer shape through cold working. According to the copper-zinc alloy product, it is possible to decrease the copper content and to appropriately secure the strength and cold workability by appropriately controlling the ratio of the β-phase.
摘要:
A copper alloy for fastening wherein the alloy has a structure of a mixture of α-phase and a β-phase; and wherein the alloy has a composition represented by the general formula: Cubal.ZnaMnb, where bal., a, and b are expressed in % by mass, bal. represents the balance, 34≤a≤40.5, 0.1≤b≤6, and inevitable impurities may be contained; and the composition satisfying the equation (1): b≥(−8a+300)/7, where 34≤a
摘要:
A copper alloy for fastening wherein the alloy has a structure of a mixture of α-phase and a β-phase; and wherein the alloy has a composition represented by the general formula: Cubal.ZnaMnb, where bal., a, and b are expressed in % by mass, bal. represents the balance, 34≦a≦40.5, 0.1≦b≦6, and inevitable impurities may be contained; and the composition satisfying the equation (1): b≧(−8a+300)/7, where 34≦a
摘要:
An electrode active material mainly includes an organic compound having, in a structural unit thereof, a conjugated diamine structure represented by the general formula (I), and an electrolyte includes a carbonate ester compound represented by the general formula (II). In the formulae, R1 to R4 represent substituted or unsubstituted alkyl groups, or the like, whereas X1 to X4 represent a hydrogen atom or a substituent. A secondary battery is achieved which has a high energy density and thus produces a high output, and has favorable cycle characteristics with a small capacity degradation even in the case of repeating charge and discharge.