磁流变体流变学特性研究

本文对所研制的矿物油价质和硅油介质磁流变体样品的零场粘度，磁流变性能，示功及速率特性进行了系统的测试和分析，并对其影响因素进行了详细的讨论.     

NUMERICAL SIMULATION OF CONTROLLING IN TITANIUM ALLOY SHEETS WELDING RESIDUAL STRESS BY TRAILING PEENING

It is a promising and new technology to apply welding with trailing peening to control welding stress and distortion of titanium alloy. Numerical simulation of conventional welding and welding with trailing peening of the titanium alloy sheet is carried out, using nonlinear finite element theory and the engineering analysis software MARC. The result shows that welding with trailing peening technology reduces longitudinal residual stress in welding joint effectively, and it is more effective to reduce residual stress to peen the weld than to peen the weld toe. It is a effective result that other technolooy and method used in welding can never achieved.     

双金属复合板带可逆冷轧有限元模拟

本文应用ANSYS有限元软件分析了热轧复合的不锈钢复合板在冷轧过程中的变形特性和界面上应力应变分布 ,分析确定了界面结合强度 ,以及确定成卷可逆带张力冷轧时的最大道次压下量值。用 3D FEM模拟了接触表面上的应力 ,计算出总轧制压力 ,与理论公式进行了对比。     

应力对SnPb基复合钎料钎焊接头蠕变性能的影响

采用搭接面积为1mm^2的单搭接钎焊接头，研究了恒定温度下，应力对纳米颗粒增强的SnPb基复合钎料钎焊接头的蠕变寿命的影响。结果表明，纳米颗粒增强的SnPb基复合钎料的蠕变抗力优于传统SnPb钎料。同时钎焊接头的蠕变寿命随应力增加而降低，且应力对复合钎料钎焊接头蠕变寿命的影响较传统63Sn37Pb钎料明显。     

Al3Ti/ZL101原位复合材料的铸造性能研究

测试了Al3Ti/ZL101原位复合材料的流动性、线收缩率、热裂倾向及铸造应力，分析了影响铸造性能的各种因素。结果表明：Al3Ti/ZL101原位复合材料的热裂抗力较基体材料大、线收缩率较基体材料小、铸造应力略大于基体材料；在780℃以下，Al3Ti/ZL101原位复合材料的流动性优于基体材料。对Al3Ti/ZL101原位复合材料采用同基体材料相同的铸造工艺即能满足生产要求。     

铝电解槽电解质-铝液流动及铝液表面变形计算

在ANSYS平台上采用有限元法和k—c湍流模型求解粘性不可压缩流体三维雷诺平均的Navier—Stokes方程，计算在电磁力作用下铝电解槽液体流动。对电解质和铝液的流场分别求解，然后利用分层液体界面压强连续条件计算铝液表面变形。230kA电解槽的计算结果表明电解质和铝液流动为近似水平的两个旋涡，其中一个旋涡的中央区铝液表面上升，另一个旋涡中央区铝液表面下降。流动速度从旋涡中心向外增加，最大速度发生在电解槽边壁附近，并迅速减少为零。这种速度特性表明电解槽边壁某些部分承受较大摩擦力。计算结果与230kA电解槽在运行5个半月后的实测数据基本一致。     

高温烟气焙烧铝电解预焙槽的工业应用

针对目前国内外铝电解槽焙烧启动方法的特点，提出用燃料燃烧产生的高温烟气来焙烧启动预焙阳极铝电解槽。并在160kA系列和75kA系列预焙槽上进行了工业试验，结果表明烟气焙烧技术易于实现电解槽焙烧操作的自动化，使阴极温度缓慢均匀上升，阴极表面温度均匀，不但能方便地按要求焙烧好阴极炉底．而且能使侧部札糊取得很好的焙烧效果，氧化烧损少．是较理想的铝电解槽焙烧启动方法。     

岸吊焊缝裂纹分析与改进措施研究

从材料的焊接性能、焊接结构、焊条、预热与焊后热处理、焊接工艺参数等角度对岸吊胎架焊缝裂纹进行了分析,提出了改进措施,取得了良好的效果。     

银包铜粉的制备工艺及研究进展

介绍了银包铜粉的制备工艺及研究现状。银包铜粉的制备方法包括置换法、化学还原法、置换与化学沉积复合法及熔融雾化法。分析了常见的置换法和化学还原法制备银包铜粉时的镀液组成、沉积机制,给出了较为成熟的制备工艺。银包铜粉与贵金属粉相比有着极高的价格优势,在电子浆料中有着广阔的应用前景。     

Stress Corrosion Cracking of Cast 6063 and Deep Drawn 1017 Aluminum Utensils In Lycopersicum esculentum

In the black world cup-shaped utensils cast or deep drawn are usually used for cooking purpose. The utensils are made from deep drawn aluminum alloy of the 1xxx series and for cast 6xxx series. The cylindrical shape utensil is subjected to domestic heating cycles and after a while, tiny hole-like features termed pits will appear. This development will eventually shorten the service life of aluminum cooking utensils. This article examines the chemical response of deep drawn and cast utensils made from 1017 and 6063 aluminum alloys, respectively, in solution of Lycopersicum esculentum at a temperature other than ambient temperature. The results show that cast cylindrical utensils pit much more readily than deep drawn utensils. This occurrence is traceable to the presence of microcracks as a result of hydrogen embrittlement phase, precipitation of brittle second phase particles and the fine texture in cast utensils. The aluminum alloy can fail by cracking along grain boundaries when exposed to specific environments.