大型环件径轴向轧制双变形区变形协调机理

项目名称： 大型环件径轴向轧制双变形区变形协调机理

项目编号： No.50805120

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 郭良刚

作者单位： 西北工业大学

项目金额： 24万元

中文摘要： 双变形区变形协调机理是大型环件径轴向轧制理论技术发展中迫切需要解决的挑战性关键科学问题。本项目采用计算机建模仿真为主、并与理论解析和试验有机结合的方法，研究建立了环件径轴向轧制过程基于双变形区变形协调的稳定成形条件，解决了径轴向双变形区的变形协调及稳定成形的难题；研究开发了环件径轴向轧制双变形区协调变形与过程控制的三维热力耦合有限元仿真模型与方法，为该过程的精细化研究提供了先进的仿真平台；通过揭示毛坯形状尺寸与双变形区变形协调的关联关系，建立了毛坯尺寸设计方法和技术；研究开发了环件径轴向轧制工艺设计与管理软件系统，提供了工艺参数快速设计与数字化管理软件工具；阐明了多场多因素作用下环件轧制精确成形机理和规律，为该过程的优化设计与稳健控制提供了重要依据。该研究深刻揭示了大型环件径轴向轧制双变形区变形协调机理和规律、钛合金环件热轧宏微观演变规律、以及环件冷辗轧不均匀变形行为与稳定性影响因素和规律，丰富和发展了环件轧制理论和技术，具有重要的理论意义和广阔的工程应用价值。

中文关键词： 双变形区；稳定成形条件；计算机仿真；毛坯尺寸设计；成形机理和规律

英文摘要： Deformation compatibility mechanism of dual-deformation-zone materials is a challenging key science problem urgently to be solved during R&D of large radial-axial ring rolling theory and technology. The results obtained in this project by computer simulation, theoretical analysis and experiment are summarized as follows. (1) The steady forming condition based on deformation compatibility of dual-deformation-zone materials has been established, which overcome the challenge of realizing the deformation compatibility and steady forming of the process; (2) The thermal-mechanical 3D-FE model and simulation method for radial-axial ring rolling have been developed, providing an advanced platform for nicely simulating the deformation of dual-deformation-zone materials and the control of the process; (3) The theory and technology for the design and optimization of ring blank have been established by revealing the relationship between the sizes of ring blank and the deformation compatibility of dual-deformation zone materials; (4) A process planning and management system for radial-axial ring rolling was developed successfully, providing a software tool for the quick planning of process parameters and their numerical management; and (5) The forming mechanism and laws of ring rolling process under the interactions of multiple fields and multiple factors were revealed, providing a significant basis for the optimum design and steady control of the process. In summary, the study carried out in this project revealed the deformation compatibility mechanism of dual deformation zones in radial-axial ring rolling, the macro- and micro- evolution laws of titanium alloy ring rolling, and the unequal deformation behavior and process stability laws of cold ring rolling. The achievements of this study are of significance to developing advanced theory and technology of ring rolling and are of the great academic value and extensive potential application in aerospace and energy areas.

英文关键词： dual deformation zones; steady forming condition; computer simulation; ring blank design; forming mechanism and laws