多模式超声振动等径角挤压超细晶纯铝成形机理研究

doi:10.3901/JME.2021.23.241

机械工程学报 ›› 2021, Vol. 57 ›› Issue (23): 241-251.doi: 10.3901/JME.2021.23.241

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多模式超声振动等径角挤压超细晶纯铝成形机理研究

韩光超¹, 石秋雨¹, 沈豫楚¹, 徐林红¹, 刘初见²

1. 中国地质大学机械与电子信息学院武汉 430074;
2. 中国地质大学地质过程与矿产资源国家重点实验室武汉 430074

收稿日期:2020-12-19 修回日期:2021-06-26 出版日期:2021-12-05 发布日期:2022-02-28
通讯作者: 韩光超(通信作者),男,1974年出生,博士,教授,博士研究生导师。主要研究方向为超声辅助微塑性成形工艺和超声辅助切削加工工艺。E-mail:hgc009@cug.edu.cn
作者简介:石秋雨,女,1996年出生。主要研究方向为超声辅助等径角挤压成形工艺与机理。E-mail:1725916508@qq.com
基金资助:
广东省基础与应用基础研究基金（2021A1515011991）、机械系统与振动国家重点实验室开放课题（MSV201910）、国家自然科学基金（21576240）和深圳市中央引导地方科技发展专项资金（2021Szvup159）资助项目。

Research on the Forming Mechanism of Multi-mode Ultrasonic Assisted Equal Channel Angular Pressing for Ultrafine Grained 1070 Pure Aluminum

HAN Guangchao¹, SHI Qiuyu¹, SHEN Yuchu¹, XU Linhong¹, LIU Chujian²

1. School of Mechanical and electronic Information, China University of Geosciences, Wuhan 430074;
2. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074

Received:2020-12-19 Revised:2021-06-26 Online:2021-12-05 Published:2022-02-28

摘要/Abstract

摘要： 超细晶金属材料由于具有优异的力学性能，特别适合微小金属零件的塑性成形。大塑性变形法是制备超细晶金属材料的常用方法，等径角挤压法被认为是最具有发展前景的大塑性变形方法之一。传统等径角挤压需要通过多道次的应变量累积来获得超细晶材料，制备效率较低。将超声振动与等径角挤压过程相结合可以有效减小挤压成形载荷，提高等径角挤压制备超细晶的性能和效率。现有研究主要采用工具辅助超声振动模式，提出并研发基于工件辅助超声振动模式的等径角挤压成形工艺，并对不同超声振动模式1070纯铝等径角挤压成形机理进行对比研究，研究工具超声振动和工件超声振动两种不同振动方式对晶粒道次细化能力的影响规律。结果表明，随着超声功率的增大，工具超声振动和工件超声振动的超声软化效应逐渐增强，能更大幅度降低等径角挤压成形力，并提高晶粒道次细化能力。工件超声振动比工具超声振动更有利于吸收超声能量，从而能更有效提升超细晶金属的制备效率。

关键词: 工具超声振动, 工件超声振动, 等径角挤压, 超细晶金属, 纯铝

Abstract: With its excellent mechanical properties, ultrafine grained metal materials are especially suitable for the micro plastic forming of small parts. Large plastic deformation method is a common method for preparing ultrafine grained metal materials. And the Equal Channel Angular Pressing (ECAP) method is considered as one of the most promising large plastic deformation methods. The traditional ECAP process requires multiple passes of strain accumulation to obtain ultra-fine grained metal materials, so the preparation efficiency of which is low. The combination of assisted ultrasonic vibration and ECAP process can effectively reduce the extrusion forming load and improve the preparation efficiency of ECAP. The existing research on ultrasonic assisted ECAP is mainly on the ultrasonic vibration of tool. The workpiece ultrasonic vibration assisted ECAP process is proposed and studied. The forming mechanism of 1070 pure aluminum ECAP process is made comparing study with two ultrasonic vibration modes. The influence rules of two different ultrasonic vibration modes on grain refining ability are also studied. The results show that the ultrasonic softening effects of tool vibration of and workpiece vibration are all improved with the increase of ultrasonic power, which can greatly reduce more ECAP forming force and improve the ability of refining grain of passes. The workpiece ultrasonic vibration mode can absorb more ultrasonic energy than the tool ultrasonic vibration mode, which can effectively improve the preparation efficiency of ultrafine grained metal materials.

Key words: ultrasonic vibration of tool, ultrasonic vibration of workpiece, equal channel angular pressing, ultrafine grained metal, pure aluminum

中图分类号:

TG663

韩光超, 石秋雨, 沈豫楚, 徐林红, 刘初见. 多模式超声振动等径角挤压超细晶纯铝成形机理研究[J]. 机械工程学报, 2021, 57(23): 241-251.

HAN Guangchao, SHI Qiuyu, SHEN Yuchu, XU Linhong, LIU Chujian. Research on the Forming Mechanism of Multi-mode Ultrasonic Assisted Equal Channel Angular Pressing for Ultrafine Grained 1070 Pure Aluminum[J]. Journal of Mechanical Engineering, 2021, 57(23): 241-251.

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多模式超声振动等径角挤压超细晶纯铝成形机理研究

Research on the Forming Mechanism of Multi-mode Ultrasonic Assisted Equal Channel Angular Pressing for Ultrafine Grained 1070 Pure Aluminum

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