硅溶胶在精密铸造中的应用EI

本文介绍了硅溶胶的特性及其在精密铸造中的应用。     

氧化铝纤维增强铝基复合材料热磨损研究EI

采用挤压铸造法制备了Al_2O_3纤维和Al_2O_3·SiO_2纤维增强铝基复合材料,在室温及200～400℃下进行了磨损性能试验。结果表明,复合材料的热磨损性能受纤维取向、纤维成分、基体成分及对磨材料硬度所影响,纤维的加入明显提高了铝基合金的耐磨性。     

3t电渣钢9Cr2Mo工艺实践

为进一步提高冷轧辊电渣锭的内(外)质量、降低生产成本的要求,贵阳特钢采用400mm×300mm矩形连铸坯取代(φ)330mm铸锭做为电渣母材,在计算机全过程自动控制下,实现1支自耗电极重熔1支3吨电渣锭9Cr2Mo.电渣冶炼的填充比由初期的0.347提高到0.487,电渣锭成锭率由91.17%提高到96.87%,电渣重熔电耗由1762kWh/t下将到1477 kWh/t.     

消失模工艺在矿车铸件生产中的实践

针对矿车铸件的生产工艺,大胆引进消失模工艺,通过实践及对生产过程的经验总结,为进一步完善提高生产技术和改进措施,扩大消失模工艺在其他产品的应用提出了意见。     

近终形薄带连铸工艺技术比较

近终形薄带连铸是钢铁工业简化工序，节能降耗，降低成本最具有竞争能力的一项重大新工艺技术，本文报导了世界各先进工业国近年来开展研究的最新成果，分析比较了诸多机型的优缺点，并提出了突破工艺技术的技术关键和建议。     

Rapid Prototyping and Tooling of Custom-Made Tracheobronchial Stents

Rapid prototyping (RP) and rapid tooling (RT) techniques can be applied to the field of medicine primarily because of their ability to produce customised profiles and geometries in relatively short lead times. In this paper, the process by which these techniques can be applied for the production of customised tracheobronchial stents for the purpose of maintaining patency in an occluded respiratory tract is described. A comparison of RP systems was carried out to establish the preferred RP method to produce the master model. The vacuum casting RT process was then used to produce the stent.     

涟钢连铸优质钢的实践分析

本文介绍涟钢第一炼钢厂１号小方坯连铸机浇铸优质钢的生产实践，并探索连铸优质钢的途径。指出为保证质量，必须严格保证钢水质量，控制合适的浇铸温度，拉坯速度和冷却强度；钢水必须吹氩；采用大容量中间包和伸入式水口保护渣浇涛，确保连铸机的状况良好。     

极压聚脲基润滑脂在CSP薄板坯连铸机上的应用

根据CSP薄板坯连铸机的工况特点，基于合理润滑的原则，论述了JZEP极压聚脲基润滑脂在CSP薄板坯连铸机上的成功应用。     

Study on Numerical Simulation of Mold Filling and Solidification Processes under Pressure Conditions

The mold filling and solidification simulation for the high pressure die casting (HPDC) and low pressure die casting (LPDC) processes were studied.A mathematical model considering the turbulent flow and heat transfer phenomenon during the HPDC process has been established and paralled computation technique was used for the mold filling simulation of the process.The laminar flow characteristics of the LPDC process were studied and a simplified model for the mold filling process of wheel castings has been developed.For the solidification simulation under pressure conditions,the cyclic characteristics and the complicated boundary conditions were considered and techniques to improve the computational efficiency are discussed.A new criterion for predicting shrinkage porosity of Al alloy under low pressure condition has been developed in the solidification simulation process.     

连铸坯的液芯轧制

研究了连铸坯的液芯轧制，并结合日本川崎永岛厂的实例，证实了连铸坯液芯轧制的可行性，指出了钢锭和连铸坯液芯轧制的区别，及如何制造压应力状态，推导了坯壳应力与轧辊直径压下量，坯壳厚度的关系，并提出了用振摆式轧机实施连铸机液芯轧制的方案。