高锌杂铜电解生产铜粉工艺研究

铜粉作为粉末冶金制造的重要原料,主要应用在金刚石工具、粉末冶金零件、碳刷及其他领域.其制备方法较多：主要有电解法、水和气雾化法、化学法、热处理法、氧化还原法等,其中以电解铜粉纯度高,颗粒呈树状,比表面积大,成形性能优异,占据国内铜粉的主导地位.本文对来源于某化肥厂的废旧高锌杂铜（又名铜触媒）进行了生产铜粉的试验,将其中的有价元素铜、锌分别以铜粉和七水硫酸锌的形式回收.[编者按]     

铝合金表面电刷镀碱性铜镀层性能研究

通过刷镀特殊镍过渡层的方法,在铸铝基体上成功刷镀了较厚的碱性铜镀层,并对镀层的基本性能及摩擦学性能进行了测试和分析。结果表明,镀层厚度分布均匀、致密,镀层与基体界面清晰,未出现氧化物夹层, 镀层的韧性和结合强度均较好;测得碱性铜及铸铝基体的显微硬度分别为230．6、74．2HV0．5;碱性铜的镀制使基体表面显微硬度及耐磨性均提高了2倍多,磨损状况明显改善。铸铝电刷镀碱性铜技术可望在重型车辆变速箱轴承外套的磨损修复处理上得到推广应用。     

碳化钨钢结硬质合金渗硼层热疲劳特性的研究

本文对GJW50碳化钨钢结硬质含金进行了粉末渗硼处理，在自约束型热疲劳试验机上进行了25－680℃的效疲劳试验．用光学显微镜和扫描电镜观察了在突变热应力的作用下，热疲劳裂纹在渗硼层萌生、扩展的全过程．试验结果为表面硬化处理在碳化钨钢结硬质含金热作模具上的应用提供了理论依据．     

新型复合型铜缓蚀剂的实验研究

用电化学和失重法，研究了一种以DG1和BTA为成分的复配缓蚀剂对黄铜的缓蚀作用，并同BTA单独使用时的缓蚀效果比较，发现这种复配缓蚀剂有更优的缓蚀性能，并通过实验找出了两种缓蚀剂的最佳配比：在总浓度为５ mg/L和质量比DG1∶BTA=3∶2时缓蚀效果最好，使用最经济，通过极化曲线分析，复配缓蚀剂为偏阳极混合型缓蚀剂.     

Induced effects of Cu underlayer on（111） orientation of Fe50 Mn50 thin films

Effects of Cu underlayer on the structure of Fe50 Mn50 films were studied. Samples with a structure of Fe50 Mn50 (200 nm)/Cu(tcu) were prepared by rnagnetron sputtering on thermally oxidized silicon substrates at room temperature. The thickness of Cu underlayer varied from 0 to 60 nm in the intervals of 10 nm. High-vacuum annealing treatments, at different temperatures of 200, 300 and 400℃ for 1 h, respectively, on the Fe50Mn50 (200 nm)/Cu(20 nm) thin films were performed. The surface morphologies and textures of the samples were measured by field emission scan electronic microscope (FE-SEM) and X-ray diffraction(XRD). Energy dispersive X-ray spectroscopy (EDX) and Auger electron spectroscopy(AES) were used to analyze the compositional distribution. It is found that Cu underlayer has an obvious induce effect on (111) orientation of Fe50 Mn50 thin films. The induce effects of Cu on (111) orientation of Fe50 Mn50 changed with the increase of Cu layer thickness and the best effect was obtained at the Cu layer thickness of 20 nm. High-vacuum annealing treatments cause the migration of Mn atoms towards surface of the film and interface between Cu layer and substrate. With the increasing annealing temperature, migration of Mn atoms is more obvious, which leads to a Fe-riched Fe-Mn alloy film.     

Effect of second phase precipitation behavior on mechanical properties of casting Al-Cu alloys

The effect of the second phase precipitation behavior on the mechanical properties and fracture behavior of the modified casting Al-Cu alloys was investigated. The tensile strength of the alloys increases firstly and then decreases due to the appearance of θ＇ precipitation phases, which increases firstly and then become coarser with the aging time increasing from 10 h to 20 h at 155 ℃. The strength of the alloys reaches the peak, resulting from ,Ω and θ＇ precipitation phases, and decreases due to ,Ω phases becoming coarser and θ＇ precipitation decreasing with the aging time increasing from 10 h to 20 h at 165 ℃. ,θ phase becoming coarser and θ＇ precipitation decreasing result in the strength of the alloys drastically decreasing after aging at 175 ℃ for 20 h. The ductility remains high level with increasing aging time at 155 ℃. The ductility irregularly changes as aging time prolongs at 165 ℃. The ductility is very low and at the same time gradually decreases with increasing aging time at 175 ℃. The Al-Cu alloy with a promising combination of tensile strength and ductility of about 474 MPa and 12.0% after aging at 165℃ for 10 h is due to a dense, uniform distribution of,Ω precipitation phases together with a heterogeneous distribution of θ＇ precipitations.     

电冰箱铜铝接头的直流闪光焊

在对电阻对焊，电容贮能焊，交流闪光焊等不同工艺焊接的铜铝接头的微观组织及焊接工艺特征分析的基础上，通过在研制的直流闪光焊机上进行了焊接试验表明，电冰箱铜，铝接头的直流闪光焊，不仅可使焊缝在一定的条件下不泄漏，不开裂，并可排除微观组织中的脆性相γ２（Ｃｕ９Ａｌ２）。     

新疆富蕴县乔夏哈拉金铜铁矿矿床地质特征探讨

乔夏哈拉金铜铁矿床位于准噶尔盆地北缘，准噶尔褶皱系，北缘与阿尔泰褶皱系的接合部位，区域地层属准噶尔地层区二台小区，出露地层以古生界泥盆系、石炭系为主，赋矿地层主要为中泥盆统北塔山组。矿带沿着地层走向断续延伸，呈北西一南东向带状展布，长约5km，宽100～200m，由一系列大小不等的含金铜磁铁矿（化）体组成。自北西至南东依次为乔夏哈拉西矿区、中矿区、东矿区，各区（段）1～1．5km。三个主要成矿阶段可以相互叠加，也可以独立分布，当同一矿体中三个成矿阶段叠加时，形成铁铜金综合矿体。该矿床成因为火山沉积-热液叠加改造型。     

欧盟：有色金属工业主要经济指标（之二）

2003年，当世界(欧盟除外)产量保持稳定的情况下，欧盟的精炼铜产量下降了8％。2004～2005年对世界精铜产量增加的预期主要来自于对亚洲(中国、印度、泰国)生产能力增加的预期，然而据估计，产量的不足的情况还在发展。因为日益增长的消费量超过产量的增长速度。     

用固气法铬硅共渗提高铸铁的耐蚀性能

采用固气法对灰铸铁和球墨铸铁进行了铬硅共渗试验。研究了渗后的组织，渗层形成动力学，渗层硬度及耐蚀性。结果表明，利用固气法可在灰铸铁表面获得致密的，硬度较高的富铬渗层，其厚度达１５－２０μｍ。渗层的耐蚀性与０Ｃｒ１８Ｎｉ９不锈钢在１０％ＨＣｌ溶液中的耐蚀性相近。此外，随着罐内渗剂量的增加，同等工艺条件渗层的含硅量增加，而其耐蚀性则由于渗层中含有较多的石墨及孔隙而有所降低。