Influence of Working Handening Effect on Aging Structures and Properties of Cu-3.2Ni-0.75Si Alloy
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摘要: 利用显微硬度法研究了Cu-3．2N-i0．75Si合金不同时效组织的加工硬化效应对合金组织和性能的影响。研究表明,Cu-3．2N-i0．75Si合金中Ni2Si相的大小和分布对合金时效硬化效应产生显著的影响,450℃×8h时效组织加工硬化效应最大,变形量为80％时,显微硬度增幅在Hv60左右；550℃×8h时效组织随变形量增加其硬度变化最平缓,变形量为80％时,显微硬度增幅仅为Hv10左右。随着变形量的增加,合金的导电率缓慢下降,80％变形后,450℃×4h、450℃×8h和500℃×8h的时效组织导电率均下降6％IACS左右,而550℃×8h时效组织的导电率变化不大。
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关键词:
- Cu-Ni-Si合金 /
- 时效 /
- 显微硬度 /
- 导电率 /
- 加工硬化
Abstract: Influence of working hardening effect on aging structures and properties of Cu-3.2Ni-0.75Si alloy is investigated through microstructure hardness method.It is indicated that the size and distribution of Ni 2Si phase after aging have obvious effect on working hardening and conductivity of the alloy.The structure aging at 450℃×8h shows the highest working hardening effect and its increase in microhardness is about Hv60 at cold rolling ratio of 80%.With the deformability increases,the fluctuation of microhardness aging at 550℃×8h is within a narrow range of about Hv10 at cold rolling ratio of 80%.The conductivity of the alloy decreases slowly with the increase of cold rolling ratio.At deformability of 80%,the alloy exhibits 6% IACS decrease of conductivity when aging at 450℃×4h,450℃×8h or 500℃×8h,but little variations when aging at 550℃×8h.-
Key words:
- Cu-Ni-Si alloy /
- Aging /
- Microstructure hardness /
- Conductivity /
- Working hardening
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