PURPOSE:To improve the tensile strength, elongation and electric conductivity by carrying out annealing immediately before final cold rolling at a high temp. in a short time when a Cu-Cr-Sn or Cu-Cr-Sn-P alloy for a lead frame is hot rolled and worked into a plate by repeated cold rolling and annealing. CONSTITUTION:A Cu-Cr-Sn or Cu-Cr-Sn-P alloy ingot for a lead frame contg. 0.05-1.0wt% Cr and 0.01-0.5wt% Sn or further contg. 0.2wt% P is worked into a plate or a bar by hot rolling and is finally worked into a plate or a bar of the desired shape by repeated cold rolling and annealing. At this time, annealing immediately before final cold rolling is carried out at 650-800 deg.C high temp. in 1-10min short time. A Cu alloy material for a lead frame having =50kg/mm.2 tensile strength and =8% elongation representing the toughness of a lead part is manufactured.
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机译：目的：通过在高温下进行最终冷轧前立即进行退火，以提高抗拉强度，伸长率和电导率。在短时间内将用于引线框架的Cu-Cr-Sn或Cu-Cr-Sn-P合金热轧并通过反复冷轧和退火加工成板。组成：用于引线框架的Cu-Cr-Sn或Cu-Cr-Sn-P合金锭（续）。 0.05-1.0wt％的Cr和0.01-0.5wt％的Sn或进一步续。 ＜0.2wt％的P通过热轧加工成板或棒，最后通过反复冷轧和退火而加工成所需形状的板或棒。此时，在650-800℃的高温下进行即将进行最终冷轧之前的退火。在短短1-10分钟内。制造用于引线框架的Cu合金材料，其具有≥50kg/ mm 2的抗拉强度和≥8％的伸长率，其表示引线部分的韧性。
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