摘要
对Cu-1.0Cr合金依次进行热锻、固溶、冷轧及不同温度和时间下的时效处理,测试了不同状态下合金的硬度及电导率,并进行了微观组织观察。结果表明,在380℃时效时,硬度和电导率均随时效时间的延长而升高;在450℃时效时,硬度随时效时间的延长明显下降,电导率基本不变。Cu-1.0Cr合金的最佳时效参数为450℃时效6h,获得的硬度(HB)和电导率分别为127和40.08MS/m。微观组织研究表明,形变热处理后,在Cu基体上出现弥散分布的第二相颗粒;随着时效温度的升高和时效时间的延长,合金发生再结晶,在450℃时效时,再结晶使合金硬度显著下降。
The Cu-1.0Cr alloy was hot forged,solid solution-treated and cold rolled as well as subjected to aging treatment at different temperature for different time.Hardness and electrical conductivity of the alloy at different states were measured and microstructure was observed.The results reveal that at 380℃,hardness and electrical conductivity are increased with extending in aging time,while at 450℃,with extending in aging time,hardness is obviously decreased,however,electrical conductivity keeps stable.At given experimental conditions,hardness and electrical conductivity of the alloy with aging at 450℃ for 6hours reach up to 127HB and 40.08MS/m.Secondary disperoid in the Cu matrix can be observed in the alloy after thermo-mechanical treatment,which is responsible for the raise of hardness and electrical conductivity.Recrystallization appears in the alloy with increasing in aging temperature and aging time,which results in the great decrease of hardness at 450℃.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2010年第10期938-941,共4页
Special Casting & Nonferrous Alloys
基金
河南省科技创新杰出青年基金资助项目(094100510005)
洛阳市科技攻关资助项目(0903041A)
关键词
冷轧变形
时效
硬度
电导率
再结晶
Cold Deformation,Aging,Hardness,Electrical Conductivity,Recrystallization
