摘要
研究了不同工作条件对钢铝导电杆复合界面的结合强度及导电性的影响.结果表明,经10次加热到400 ℃-空冷循环后,钢铝界面仍呈紧密结合状态,界面电阻变化不大,为0.5～0.6 μΩ;而加热到500 ℃-空冷循环4次时界面仍然完好,加热-空冷循环5次后Fe元素在Al中的扩散深度变大,复合界面有轻微开裂,在8～10次时钢铝复合界面开裂程度较为严重.此外,在500 ℃时界面电阻随加热次数增加而增大,特别是界面出现开裂时电阻变化更大.因此,钢铝导电杆比较合适的工作温度在400 ℃左右.
Effects of working conditions on bonding strength and conductive properties of steel-aluminum cladding interface have been investigated.The results show that after 10 times heating-cooling cycle from 400 ℃ to the room temperature,the cladding interface keeps strong bonding and the interfacial electric resistance remains 0.5~0.6 μΩ,which vary little compared to as-claded ones.With the cycle from 500 ℃ to room temperature,the interfacial bonding keeps well after 4 cycles.However,slight crack can be observed in the interface after 5 cycles due to increasing the diffusion depth of the Fe element into the Al matrix,furthermore,the crack in the cladding interface becomes more and more serious after 8~10 cycles.In addition,the interfacial electric resistance is increased with increasing heating times at 500 ℃,especially exhibiting sharply variation after crack in the cladding interface.The desirable working temperature of the steel-aluminum rods is about 400 ℃.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2007年第3期232-234,共3页
Special Casting & Nonferrous Alloys
关键词
钢铝导电杆
界面
组织
导电性
Steel-aluminum Electric Conducting Rod,Interface,Microstructure,Conductive Properties
