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

金属和金属合金熔炼、铸造和塑性加工的集成优化

基本信息

批准号：
63460195
负责人：
KIHARA Junji
金额：
$ 4.03万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

项目摘要

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

在现代或不久的将来的钢铁制造和加工系统中，熔化、铸造或塑性成形等基本技术被融合并集成到新的强大的加工系统中，这些加工系统可以在下世纪发展成为制造基地。熔融锻造或糊状金属合金锻造是典型的塑性加工技术，是铸造和锻造技术相结合的新工艺。机械合金化或爆炸成形被认为是新的混乱，其中熔化处理和塑性加工集成到新的面。在本研究中，研究人员关注的是了解熔化，铸造和塑性加工集成的新的有前途的工艺的概念和细节设计的基本特征和方法框架，并描述这些过程的集成优化。在熔炼和铸造工艺优化方面，提出了新的计算模型， ...更多信息 sed和developed：提出了四叉树/改进四叉树模型，并充分利用了该模型进行集合或布尔运算来处理形状复杂的铸件。我们开发的原型系统已经证明了我们的方法的正确性和有效性。由于三维轧制行为已成为或将成为轧制技术中的一个重要问题，新的轧制分析框架已经发展到处理实际的三维轧制行为，甚至复杂形状的轧制系统，我们发展的变形模式方法提供了基本的工具，以评估在平整轧制的工作轮廓和预测形状的变化在形状轧制。该方法可方便地与边界元法的传热分析相结合，以考虑工件变形与工件内传热/温度分布的相互影响。通过对钢或镍在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延展性的基本性能和响应;这些研究导致对过程冶金中出现的各种机制的深刻理解。上述研究为构建新型融合集成工艺提供了基础。少