Integrated Optimization of Melting, Casting and Plastic Working for Metals and Metallic Alloys

在现代或不久的将来的炼钢和加工系统中，熔炼、铸造或塑性成形等基本技术被融合和集成到新的强大的加工系统中，这些系统可能成为下个世纪的制造基地。熔融锻造或糊状金属合金的锻造是一种典型的塑性工艺，它将铸造和锻造技术结合在一起形成新的工艺。机械合金化或爆炸成形被认为是熔化处理和塑性加工结合成新的面的新的混杂形式。在本研究中，研究人员致力于了解熔融、铸造和塑性加工一体化的新工艺的概念和细节设计的基本特征和方法框架，并描述这些工艺的综合优化。在熔铸优化方面，提出了一种新的计算模型…。提出并充分利用了四叉树/改进的四叉树模型，使我们能够进行集合或布尔运算来处理复杂形状的铸件。我们正在开发的原型系统已经证明了我们方法的有效性和有效性。由于三维行为已经成为或将成为轧制技术中的一个基本问题，新的轧制分析框架已经被开发出来，以处理实际的三维轧制行为，即使是对于复杂的板形轧制系统；我们发展的变形模态法为评估平板轧制的工作型材和预测板形轧制中的形状变化提供了基本的工具。该方法可以方便地与边界单元法的热传导分析相结合，考虑工程变形与工程传热/温度分布之间的相互作用。通过对钢或镍的受控温度历史和程序加载条件下的高温单轴拉伸试验，我们了解了这些材料在相对较宽的温度范围内失去塑性时的基本性能和响应，这些研究有助于深刻理解过程冶金中出现的各种机制。以上研究为构建新型融合集成加工技术提供了依据。较少

In the modern or near-future steel making and processing systems, such elemental technologies as melting, casting or plastic forming are fusioned and integrated into new powerful processing systems which could grow coming bases of fabrication in next century. The melting forging or the forging of mushy-state metal alloys are typical technology of plasticity where both casting and forging technologies are combined into new processing. The mechanical alloying or explosive forming are identified as new confusions where melting processings and plastic working are integrated into new faces. In the present study, researchers are concerned with understanding the fundamental characteristic features and frame of methodology for conceptual and detail designs of new promising processings in the integration of melting, casting and plastic working and describing the integrated optimization for these processes. With respect to the optimization of melting and casting, new computational model is propo … More sed and developed : quad-tree/modified quad-tree model is proposed and fully utilized to enable us to make set or boolean operation to deal with the complex shaped casting. Our developing prototype system has demonstrated the validity and effectiveness of our approach. Since three dimensional behaviors become or will grow an essential issue in the rolling technology, new frame of rolling analysis have been developed to deal with the actual three dimensional rolling behaviors even for complex shape rolling systems ; our developing deformation-mode method provides the fundamental tool to evaluate the work profiles in flat rolling and to predict the change of figures in shape rolling. This method can be easily connected with the heat transfer analysis by the boundary element method to take into account the mutual interaction between deformation of works and heat transfer/temperature distribution in works. Through the uniaxial tensile testing in the elevated temperature with the controlled history of temperature and the programmed loading conditions for steel or Ni, we have understood the fundamental properties and responses in the relatively wide range of temperature where these materials lose their ductility ; these studies lead to profound understanding of various mechanisms appearing in the process metallurgy. The above researches provide a basis to construct new fusioned and integrated processing. Less