热处理形变对Cu-Ni-Si-Mg合金组织和性能的影响
Effect of thermomechanical treatment on the strueture and properties of Cu-Ni-Si-Mg alloy
董彦非，任伟，李晓毅，赵红利，王艳芳，贾淑果
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作者单位：洛阳市质量技术监督检验测试中心
中文关键字：Cu-Ni-Si-Mg合金；冷变形；显微硬度；时效；引线框架
英文关键字：Cu-Ni-Si-Mg alloy; cold rolling; microhardness; aging; lead frame
中文摘要：采用大气熔炼工艺制备了Cu-Ni-Si-Mg合金，研究了冷变形量对引线框架用Cu-Ni-Si-Mg合金金相组织和显微硬度的影响，并分析了在900℃固溶后时效对不同冷变形量Cu-Ni-Si-Mg合金性能的影响。结果表明：Cu-Ni-Si-Mg合金经冷轧变形，其等轴晶组织随变形量的增大，晶粒沿变形方向逐渐伸长，变形度越大，则伸长越显著，当变形度很大时，其组织呈纤维状；Cu-Ni-Si-Mg合金经不同冷变形量的形变处理后在相同条件的时效后，初期显微硬度和导电率快速上升，随后到达峰值后并缓慢下降；Cu-Ni-Si-Mg合金固溶后经450℃×6h时效后，合金得到的良好综合性能，其显微硬度达到305Hv，导电率达到36%IACS。
英文摘要：The Cu-Ni-Si-Mg alloy was prapared used the atmosphere smelting method. The effect of cold deformation on the microhardness and electrical conductivity of Cu-Ni-Si-Mg alloy was studied, and the effect of aging after solut at 900℃ on property was analyised. The results showed that the organization of Cu-Ni-Si-Mg alloy after cold rolling increases with its equiaxed deformation, the gradual elongation of grains along the deformation direction, the larger of the deformation degree, the more significant of the elongation. When the tissue was fibrous when a large degree of deformation. The micorhardness and electrical conductivity increased rapidly at first, and then increased slightly with the increase of the aging time. After solution at 900℃ and aging at 450℃ for 6h, the Cu-Ni-Si alloy has the excellent property with the microhardness was 305HV and electrical conductivity was 36%IACS.