挤压-切削制备可控厚度的双层梯度结构带材的新工艺及机理

doi:10.3969/j.issn.1004-132X.2025.04.010

中国机械工程 ›› 2025, Vol. 36 ›› Issue (04): 732-742.DOI: 10.3969/j.issn.1004-132X.2025.04.010

• 多能场复合/组合加工 • 上一篇下一篇

挤压-切削制备可控厚度的双层梯度结构带材的新工艺及机理

庞学勤^1,2;赵俊宇¹;邓文君²;曾俞宁²;钟佩璇²*

1.昆明理工大学机电工程学院，昆明，650500
2.华南理工大学机械与汽车工程学院，广州，510641

出版日期:2025-04-25 发布日期:2025-05-21
作者简介:庞学勤，男，1991 年生，博士、讲师。研究方向为金属切削加工、塑性成形加工与制造。E-mail：pangxq@kust.edu.cn。
基金资助:
国家自然科学基金(52075187)；云南省基础研究计划(202301BE070001-021,202401CF070145)

New Process and Mechanism of Squeeze-machining for Preparing Bilateral Gradient Structure Sheets with Controllable Thickness

PANG Xueqin^1,2;ZHAO Junyu¹;DENG Wenjun²;ZENG Yuning²;ZHONG Peixuan²*

1.Faculty of Electrical and Mechanical Engineering,Kunming University of Science and Technology,
Kunming,650500
2.School of Mechanical and Automotive Engineering,South China University of Technology,
Guangzhou,510641

Online:2025-04-25 Published:2025-05-21

摘要/Abstract

摘要： 为解决超细晶材料强度高但延展性低的问题，设计了独特的挤压刀具及挤出通道，使材料在挤压、摩擦和切削的耦合作用下，一步制备厚度可控的双层梯度结构超细晶带材。采用数值模拟与试验相结合的方法对双层梯度结构纯铜带材的成形过程进行分析与研究，探索了挤压切削加工机理以及工艺参数对双层梯度微结构的影响规律。研究结果表明，相比于原纯铜试样，挤压切削制备的双层梯度结构纯铜带材的最大硬度约提高了三倍，同时带材也表现出优异的强度延展性协同作用，即在牺牲部分延伸率情况下，屈服强度接近翻倍，极限抗拉强度则实现了四倍增长。

关键词: 挤压切削, 可控厚度, 双层梯度结构, 梯度超细晶带材, 机械性能

Abstract: To address the issues of high strength but low ductility in ultrafine-grained materials, a unique squeeze tool and extrusion channel design was developed. This design enabled the one-step fabrication of ultrafine-grained sheets with a controllable thickness and a bilateral gradient structure through the combined effects of squeeze, friction and cutting. The numerical simulation and experimental methods were combined to analyze the forming processes of bilateral gradient structured pure copper sheets. The mechanism of squeeze-machining machining and the influences of processing parameters on the formations of the bilateral gradient microstructure were explored. The results show that, compared to the original pure copper samples, the maximum hardness of the pure copper sheets prepared using the squeeze-cutting method is increased by approximately threefold. Additionally, the sheets exhibit an excellent strength-ductility synergy: while some ductility is sacrificed, the yield strength nearly is of doubles, and the ultimate tensile strength increases by a factor of four.

Key words: , squeeze-machining, controllable thickness, bilateral gradient structure, gradient ultra-fine-grained sheet, mechanical property

中图分类号:

TG376

庞学勤1, 2, 赵俊宇1, 邓文君2, 曾俞宁2, 钟佩璇2. 挤压-切削制备可控厚度的双层梯度结构带材的新工艺及机理[J]. 中国机械工程, 2025, 36(04): 732-742.

PANG Xueqin1, 2, ZHAO Junyu1, DENG Wenjun2, ZENG Yuning2, ZHONG Peixuan2. New Process and Mechanism of Squeeze-machining for Preparing Bilateral Gradient Structure Sheets with Controllable Thickness[J]. China Mechanical Engineering, 2025, 36(04): 732-742.

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https://www.cmemo.org.cn/CN/Y2025/V36/I04/732

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挤压-切削制备可控厚度的双层梯度结构带材的新工艺及机理

New Process and Mechanism of Squeeze-machining for Preparing Bilateral Gradient Structure Sheets with Controllable Thickness

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