共查询到20条相似文献,搜索用时 62 毫秒
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国内外电缆行业中使用量占主导地位的铜杆是连铸连轧的低氧铜杆和上引连铸的无氧铜杆;从低氧铜杆和无氧铜杆的电性能、氧的存在状态以及可拉性等方面,阐述了它们的差异,提请用户择优选用,以取得最佳经济效益. 相似文献
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连铸连轧低氧铜杆和上引连铸无氧铜杆由于制造工艺的不同导致在组织结构和机械性能方面不同,最终体现在下道加工性能上。本文从拉制性能、退火性能和铜材的表面质量三方面对两种铜杆进行了对比和分析。 相似文献
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连铸连轧低氧铜杆和上引连铸无氧铜杆由于制造工艺的不同导致在组织结构和机械性能方面不同,最终体现在下道加工性能上。本文从拉制性能、退火性能和铜材的表面质量三方面对两种铜杆进行了对比和分析。 相似文献
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分析比较了上引连续法、横列式热轧法和连铸连轧法等3种铜杆生产工艺。阐述了上引法生产铜杆的基本原理,分析了影响产品质量主要因素,并对上引铜杆加工的有关问题,提出初步建议。 相似文献
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本文对秦代的铜杆和铜丝进行了金相和成分分析,根据分析结果和考古资料断定:远在秦代,我国的工匠已掌握了一定的合金成分、铸造、热处理、锻造技术。铜杆和铜丝的加工工艺是,先配制铜合金成分,铸造成铜板,再高温固溶退火,尔后锻打成薄板并裁制成铜杆或铜丝。 相似文献
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研究了微量稀土对上引法无氧铜杆生产工艺及产品性能的影响。结果表明:加入适量稀土一方面可提高上引法无氧铜杆生产工艺的稳定性,另一方面可提高无氧铜杆的力学性能及电导率。 相似文献
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稀土对无氧铜杆生产工艺及产品性能的影响 总被引:1,自引:0,他引:1
研究了微量稀土对上引法无氧铜杆生产工艺及产品性能的影响。结果表明:加入适量稀土一方面可提高上引法无氧铜杆生产工艺的稳定性.另一方面可提高无氧铜杆的力学性能及电导率。 相似文献
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钛-铜复合棒复合界面分析 总被引:4,自引:1,他引:3
用金相显微镜和扫描电镜等对挤压 拉伸法生产的钛-铜复合棒的结合界面进行了观测分析,并对复合棒的结合性能进行了测试。结果表明,复合棒的横向结合面为波形结构,界面上没有中间形成物,拉剪强度与T2铜棒材的抗拉强度相当。 相似文献
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Subrat Das Yos Morsi Geoffrey Brooks 《JOM Journal of the Minerals, Metals and Materials Society》2014,66(2):235-244
This article presents finite-element method simulation results of current distribution in an aluminum electrolytic cell. The model uses one quarter of the cell as a computational domain assuming longitudinal (along the length of the cell) and transverse axes of symmetries. The purpose of this work is to closely examine the impact of steel and copper collector bars on the cell current distribution. The findings indicated that an inclined steel collector bar (φ = 1°) can save up to 10–12 mV from the cathode lining in comparison to a horizontal 100 mm × 150-mm steel collector bar. It is predicted that a copper collector bar has a much higher potential of saving cathode voltage drop (CVD) and has a greater impact on the overall current distribution in the cell. A copper collector bar with 72% of cathode length and size of 100 mm × 150 mm is predicted to have more than 150 mV savings in cathode lining. In addition, a significant improvement in current distribution over the entire cathode surface is achieved when compared with a similar size of steel collector bar. There is a reduction of more than 70% in peak current density value due to the higher conductivity of copper. Comparisons between steel and copper collector bars with different sizes are discussed in terms CVD and current density distribution. The most important aspect of the findings is to recognize the influence of copper collector bars on the current distribution in molten metal. Lorentz fields are evaluated at different sizes of steel and copper collector bars. The simulation predicts that there is 50% decrease in Lorentz force due to the improvement in current distribution in the molten metal. 相似文献
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设计和制造了一台制备铜包铝复合扁排的立式充芯连铸试验设备,该设备的特点是在高度方向上设置上下两个加热坩埚分别熔化铜和铝;外层铜管在结晶器中首先形成,铝液随之通过充芯管充填到铜管中,铜、铝界面通过互扩散实现冶金结合.利用此设备,成功地连铸出铜层厚度为2 mm,芯部铝厚度为10 mm,宽为60 mm的铜包铝复合扁排. 相似文献
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研究了稀土Ce加入量对挤压态纯铜杆的电导率、硬度和疲劳性能的影响.结果表明,加入稀土元素Ce的挤压铜杆晶粒明显比未加稀土的细小,起到细化晶粒的作用;加入稀土Ce能提高纯铜的电导率和硬度,改善挤压纯铜杆的疲劳性能,稀土Ce加入量为0.04%时,挤压纯铜杆的综合性能最好. 相似文献
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R. S. Cline W. E. Heitmann D. Bhattacharya 《JOM Journal of the Minerals, Metals and Materials Society》1986,38(5):26-30
This paper examines microalloyed steels—steels which develop their properties in the as-received condition without requiring further heat treatment, such as quenching and tempering. Microalloyed steel bars and forgings offer a clear cut potential for cost reduction and energy savings. The metallurgy for producing high strength microalloyed bars and forgings is in place. However, significant improvement in the notch toughness of these materials is necessary, and the metallurgy required to achieve this toughness improvement exists. With application of the necessary metallurgical techniques in rolling mills and forge shops, the utilization of high strength microalloyed steel bars and forgings will increase greatly. 相似文献
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