摘要
将渐进成形与液压胀形进行对比,研究了不同工艺下成形零件微观组织的差异,在此基础上研究工具头转速对渐进成形零件微观组织的影响。结果显示,液压胀形与渐进成形过程中均产生了晶粒细化,渐进成形中晶粒细化程度明显比液压胀形好,且工具头转速越快,成形零件的晶粒细化效果越好。由试验结果推断,渐进成形时工具头旋转所产生的切应力改变了工具头下方成形金属的应力状态,在该应力状态的作用下,晶粒细化程度增加,成形性能更好。
Compared the incremental forming with hydraulic bulging, the microstructures of part in the different process were researched. On this basis, the influence of tool rotational speed on the microstructure of part in incremental forming process was studied. The results showed that the grain refinement was occurred during hydraulic bulging and incremental forming, and the grain refinement of incremental forming was significantly better. The faster the tool rotational speed was, the grain refinement effect was better. From the experimental results, it could be inferred that the shear stress produced by the rotation of the tool during incremental forming would change the stress state of the metal below the tool. Under the action of the stress state, the grain refinement would be intensified and the formability would be better.
作者
丁科
赵伟
徐明森
DING Ke;ZHAO Wei;XU Ming-sen(Zhicheng College,Fuzhou University,Fuzhou,Fujian 350002,China)
出处
《模具工业》
2019年第3期58-61,共4页
Die & Mould Industry
基金
国家级大学生创新创业训练计划项目(201813470004)
(201713470003)
福建省教育厅科技项目(JT180815)
关键词
渐进成形
液压胀形
微观组织
晶粒细化
TRIP钢板
incremental forming
hydraulic bulging
microstructure
grain refinement
TRIP steel plate
