锻压技术

双驱动轧制成形对5A02铝合金环件应变及组织分布的影响

英文标题：Influence of double driven ring rolling on strain and organization distribution of aluminum alloy 5A02 ring

作者：冯绍贵兰箭顾青

单位：武汉理工大学

分类号：TG335

出版年,卷(期):页码：2017,42(6):82-87

摘要：

为了改善轧制环件的应变分布、提高环件组织性能，提出环件双驱动轧制成形工艺方法。以5A02铝合金环件为研究对象，通过有限元分析方法对环件双驱动轧制过程进行研究，重点分析了不同的芯辊转速对环件轧制力能参数、等效应变分布以及成形精度等的影响规律。结果表明，双驱动轧制成形相比常规环件轧制工艺，环件沿径向等效应变分布的均匀性提高了50%，且轧制过程中环件的形状精度保持性好，有利于改善环件的组织分布均匀性，提高轧制环件的综合力学性能。根据仿真计算结果，制定较优的环件双驱动轧制工艺方案，并进行环件轧制试验和显微组织分析，双驱动轧制环件内部枝晶相均匀分布且细小，弥散质点分布均匀，验证了该工艺方案的有效性。

In order to improve the strain distribution, microstructure and properties of the rolling ring, a double driven ring rolling method was proposed. Taking 5A02 aluminum alloy as the research object, the double driven ring rolling process was studied by the finite element method, and the influences of different mandrel rotation speeds on parameters of the rolling force and energy, the equivalent strain distribution and the shape accuracy were analyzed. The results show that comparing with the conventional ring rolling process, the uniformity of equivalent strain distribution of ring is increased by 50% along the radial direction, and the shape accuracy of ring is maintained well during the rolling process. Therefore, the new process can improve the microstructure uniformity and the comprehensive mechanical properties of ring. According to the results of simulation, the optimal process plan of double driven ring rolling was established, and the ring rolling test and microstructure analysis were conducted. Furthermore, the dendrite crystal phase inside the double driven rolling ring is equally distributed with tiny structures, and the dispersed particles are equally distributed. Thus, the effectiveness of the process is verified.

基金项目：

教育部创新团队发展计划项目“先进汽车零部件技术”（IRT13087）；湖北省高端人才引领计划项目（鄂科技通【2012】86号）

冯绍贵（1993-），男，硕士研究生兰箭（1972-），男，博士，教授

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