中国机械工程2025，Vol.36Issue(4)：732-742,11.DOI:10.3969/j.issn.1004-132X.2025.04.010
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
摘要
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 fab-rication 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 experi-mental 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 pa-rameters 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.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Key words
squeeze-machining/controllable thickness/bilateral gradient structure/gradient ultra-fine-grained sheet/mechanical property分类
金属材料引用本文复制引用
庞学勤,赵俊宇,邓文君,曾俞宁,钟佩璇..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(4):732-742,11.基金项目
国家自然科学基金(52075187) （52075187）
云南省基础研究计划(202301BE070001-021,202401CF070145) （202301BE070001-021,202401CF070145）
