安阳殷墟孝民屯出土两类熔铜器具的科学研究

为加深对先秦青铜熔炼技术的认识,本文采用金相显微观察、扫描电子显微镜及能谱分析法对安阳殷墟孝民屯出土的两类熔铜器具进行化学成分分析和显微组织观察,初步考察这两类熔铜器具的材质、工艺和用途。分析结果表明,坩埚是小型的、敞口式的熔铜器具,而熔炉是大型的竖炉,是孝民屯主要的熔铜器具;不同大小的熔铜器具可以适用于不同大小青铜器的铸造。

内壁熔铜及外壁熔覆的叠加再制造技术应用研究

提升现代化制造加工水平,以提高资源的高效和循环利用为核心,以节能、节材、资源综合利用和发展循环经济为重点,利用表面加工工程技术,对油缸内外壁进行熔铜熔覆加工,解决内外壁的抗磨损及耐腐蚀性问题.

瞄准国际先进水平，发奋攻关创新“连体机”设备，解决原箔氧化难题——记联合铜箔（惠州）有限公司18微米铜箔产业化示范工程项目

随着电子技术的飞速发展，电子元器件的体积和功耗逐步减小，印制电路板的布线密度越来越大(线宽和线间距减小)。这就对铜箔产品厚度及其各项性能提出了更高的要求，促进电解铜箔生产技术和发展也导致了工艺日趋复杂、念来愈先进。多年来，惠州联合铜箔公司一直致力于高档电解铜箔的研制工作，经过不懈的努力，攻克了无数的技术难关，开发出具有国际先进水平的多种高档电解铜箔产品。该产品采用独创的”连体机”生产工艺设备，克服了国内同类产品在外观形态等方面的缺陷，产品质量全面达到或超过DC(国际电子电路互连与封装协会)技术标准，性能价格比高，是优良的进口替代产品。

Casting-cold extrusion of Al/Cu clad composite by copper tubes with different sketch sections

Casting-cold extrusion technology was presented to fabricate alttminum/copper clad composite, and copper tubes with different sketch sections were designed. The technology of aluminum/copper clad composite fabricated by casting-cold extrusion was simulated by DEFORM software using tubes with four arc grooves. The stress and strain in different deformation zones were analyzed. The groove size reduces gradually and the groove shape drives to triangle during the extrusion procedure. The maximum values of equivalent effective stress and radial stress appear in groove zones, and the maximum equivalent effective strain firstly is obtained also in groove zones. The grain size in groove zones is less than that in other zones. The experimental results are consistent with simulation results, which prove that the copper tubes with sketch section are favorable to the metallurgy bond of boundary interface between aluminum and copper.