逆向浇注—一种用于生产接近成品带钢的新工艺

逆向浇注法作为带钢浇注的一种新工艺正在得到开发，此工艺是将母板带钢穿过钢水，使钢水在钢表面结晶，研究的目的是获得基本过程参数，并确定逆向浇注带钢以及随后热轧和／或冷轧成薄板的性能。     

SERT结晶器液位控制系统

介绍一种梅山冶金公司板坯连同上应用的新型的结晶器液位控制系统，它由浮式式液位检测装置，ＲＳＥ１０００控制器和电动塞棒执行机构所组成，由法国ＳＥＲＴ公司成套制造。     

Mensuration and simulation of mold filling process in semi-solid die-cast of aluminum alloy

To understand the flow trace of semi-solid slurry in mold cavity, some thermocouples were inserted in mold cavity, and the reaction timing of thermocouples showed the arrival of fluid. The filling time and rate were estimated by comparison between the experiment and calculation. The introduction of computer simulation technique based on ADSTEFAN was to predict injectionforming process and to prevent defects during trial manufacture of various parts. By comparing the formed appearance of parts in experiment and in simulation, and observing the relationship between internal defects inspected by X-ray or microscope and the flow field obtained in simulation, it was indicated that both have quite good agreement in simulation and experiment. Right predictions for cast defects resulted from mold filling can be carried out and proper direction was also proposed. The realization of numerical visualization for filling process during semi-solid die-cast process will play an important role in optimizing technology plan.     

黄铜中纳米级微裂纹的形核与钝化

黄铜薄膜试样在透射电镜中原位拉伸观察表明，在平衡条件下加载裂发出的位错纯化成无位错区，它是一个应变很高的异常弹性区。当缺口足够锐，外加载荷足够大时，这个非线弹性区中的应力有可能达到原子键合力，从而使纳米级微裂纹在无位错区中不连续形核，或从钝化的原裂纹顶端形核。这个微裂纹一昊形核，即使保持恒位移，也将钝化成空洞或缺口。     

Preparation of carbon nanotube composite material with metal matrix by electroplating

It is demonstrated that the nickel can be deposited directly on the surface of carbon nanotubes without pre-sensitization by Sn^2＋ and Pd^2＋ in a watt bath containing suspended nanotubes by electroplating. The nickel is deposited as spherical nanoparticle on the nanotubes. By increasing reaction time, the carbon nanotube is fully coated with nickel. A probable model, which represents the formation process of carbon nanotube-nickel composites by electroplating, is presented. The results show that this method is efficient and simple for preparing carbon nanotube-metal composite.     

热处理对A356/6082复合板界面组织及力学性能的影响

采用液-固轧制复合技术制备A356/6082复合板,研究热处理温度对A356/6082复合板界面组织及力学性能的影响。结果表明,随着热处理温度的升高,A356铝合金一侧共晶Si组织发生颈缩、溶断、球化,并且球化现象首先在界面处发生,界面区剪切强度逐渐增大。当热处理温度为550℃时,复合界面处组织分布均匀,Si颗粒细小圆整,界面区元素得到充分扩散,元素扩散宽度约为136μm,复合板剪切强度最大值约为145MPa,复合界面在受到均匀塑性变形时,其剪切断裂方式为脆性断裂。     

开、停车阶段工艺冷凝液回收方法的改进

1 中压汽提装置流程及存在的问题 河南省中原大化集团公司合成氨装置采用的是Unde-AMV技术，生产工艺为天然气蒸汽转化法，在脱碳工序有大量的工艺冷凝液生成。这些冷凝液在汽提塔中利用中压蒸汽进行汽提，达标冷凝液经水处理装置处理后重新利用。其流程为：低变气进入脱碳工序，经气体冷却器（05E001）、再沸器（05E002）和脱盐水预热器（05E009）换热，冷凝的水蒸气（约35t／h）在分离器（05F001）分离后，用泵（05P006A／B）送至汽提塔（05C003）；冷凝液从塔的上部进入，     

热管技术在硫酸工业余热利用中的应用

介绍了江苏圣诺热管集团根据硫酸工业余热的特点特别研制的“分离套管式—热管余热蒸汽发生器系统”。该系统应用于硫酸生产中高、中、低温余热的利用，克服了水管式余热锅炉因经常爆管而造成停产的缺点，也因取消了炉气进口侧高温高压管板，避免了管壳式余热锅炉进口管板极易烧坏的事故，同时解决了烟气温度调节的难题，经济效益是明显的。     

塑料异型材挤出模CAE技术研究进展

综述了塑料异型材挤出模CAE技术的研究进展，讨论了CAE技术中的熔体流动分析、挤出胀大分析、定型冷却分析的研究成果和发展趋势。