金属颜料分散工艺的改进

铝是这个地球最丰富的金属，在日常生活中都能找到它的应用。与所有其它颜料或填充剂相比,铝颜料是一种不同等级或类别的颜料。     

INDUSTRY NEWS

正The projectDevelopment and Application of HighStrength High-Ductility Magnesium Alloys, won first prize of 2013 jilin technological inwvention Award The projectDevelopment and Application of HighStrength High-Ductility Magnesium Alloys,completed by Changchun Institute of Applied Chemistry of CAS(Chinese Academy of Sciences),in collabration with Linjiang Dongfeng Nonfemet Co.,Ltd.,FAW Foundry Co.,Ltd.,Yangzhou Hongfu Aluminum Co.,Ltd.,and Changchun Seemay Magnesium Co.,Ltd.,won the first prize of the 2013 Jinlin Technological Invention Award.     

PCB孔壁镀层断裂研究

孔壁镀层断裂近年在许多PCB厂均有出现,由于涉及板材、层压、钻孔、镀铜等多个流程,其复杂性远远超出一般的工艺问题,而且该缺陷只能在客户贴件后发现,故其退货风险极高.本文通过对孔壁镀层断裂缺陷板的形态分析及制作工艺研究,将孔壁断裂问题锁定在镀铜过程,并最终通过针对性试验复现了镀铜条件异常导致的孔壁断裂问题,为PCB镀铜层可靠性研究提供借鉴.     

Effect of intermetallic compound β-Mg17Al12 on ductility of AZ91D magnesium alloy

The microstructures of the AZ91D die-cast magnesium alloy were investigated by scanning electron microscopy （SEM）, X-ray diffractometry （XRD） and energy dispersion spectroscopy （EDS）. Moreover, the microstructure change of AZ91D samples was observed during the process of heat treatment at 300 ℃ for different time. And the tensile testing was carried out for these samples and the fracture morphology of the tensile test samples was also examined. The results show that the microstructures of AZglD magnesium alloy are mainly composed of a-Mg phase and β-Mg17Al12 phase. The morphology of the fl phase alters from continuous distribution to discontinuous distribution during the process of heat-treatment. Meanwhile, the ductility of the materials reduces from 1.71% to 1.08% after a long time heat-treated at 300℃. Moreover, the quasi-cleavage fractures characters are also found in the fracture morphology. The granulation and discontinuous distribution of β-Mg17Al12 results in the deterioration of the ductility of AZ91D die cast magnesium alloy.     

A356合金废料延展性的电磁过滤影响

一套电磁分离设备设计并应用于连续加工A356软熔。进行延展性实验的目的是说明新合金和合金废料电磁分离的影响。与陶瓷泡沫过滤和无过滤加工相比，电磁分离能有效去除A356合金浇铸中直径大于10μm许多杂质，由此提高了延展性。尤其是A356废料延展力提高了8.27％，接近新A356合金的水平。     

A New DAO Pattern with Dynamic Extensibility

Currently existing data access object （DAO） patterns have several limitations. First, the interface of the patterns and business objects is tightly-coupled, which affects seriously the dynamic extensibility of software systems. Second, the patterns have duplicated implementation codes, which add to difficulties of system maintenance. To solve these problems, a new DAO pattern with stronger independency and dynamic extensibility is proposed in this paper. An example is given to illustrate the using process of the new DAO pattern. The greatest advantages of the new DAO pattern are as follows. If any business object is needed to add to the system, we do not have to modify any codes of the class DAO Factory. All we need to do is to modify the mapping file. Furthermore, because we have only one DAO implementation class to accomplish all the data access to business objects, if some SQL statements are needed to be modified, all we need to do is to modify the DAO implementation class but not need to modify any business objects.     

对铜材飞速涨价的思考和对策（一）

铜,是淡红而有光泽的金属,质地坚韧,富于延展性,具有很高的导热性和导电性.元素符号:Cu,比重8.9,熔点1 083℃,是我国经济发展和人们生活中(指应用)不可缺少的金属.     

纤维增强复合材料提高圆形桥柱延展性的修复设计

建筑物中柱和桥墩的修复设计要求对结构变形能力进行精确预测。本文提出分析模型近似计算经纤维增强聚合物修复的钢筋混凝土柱的潜在塑性关键区的延展性。提出能够代表纤维增强聚合物混凝土响应的双线性应力一应变模型，该模型在低压下混凝土响应降低，在高压下混凝土响应增强。对于承受轴力和弯矩的圆柱，模型采用近似形式的组合分析，根据无量纲柱参数和纤维增强聚合物提供的约束压力来计算经纤维增强聚合物修复的截面延展性。通过比较组合分析的模型估计结果和试验结果，验证纤维增强聚合物修复柱延展性模型的精确性。随后，建立了循环桥柱纤维增强聚合物简单非重复抗震修复设计程序。最后，对不同轴向荷载、含筋率、纤维增强聚合物数量进行典型桥柱参数研究，计算结果以无量纲形式给出，有助于工程师采用纤维增强聚合物进行提高柱延展性的抗震修复设计。     

生产具有高延展性射流的钼药形罩研究

高能快速成型的空心装药药形罩可以产生高延展性射流。为了进行研究，我们用数值最优化设计法设计出了一种加工条件相对简单的空心装药结构。高能快速成型的药形罩锻件是用电弧熔铸的钼棒料加工而成的。这种锻件经热处理和机加工，生产出的药形罩消除了各种应力并进行了重结晶。用三倍远距离闪光射线照相对所加工的空心装药射流的延展性进行了全面测定，通过对经机加工并重结晶、能产生极佳射流延展性的药形罩的研究。观察到了射流延     

全新MY100e系列高速精益贴片机

全新MY100e系列高速精益贴片机满足您的真正所需——拥有业内其它设备无可比拟的多功能性和延展性。