新型振动辅助粉末输送系统增材制造钴基合金/铜合金界面互锁结构

doi:10.3901/JME.2024.23.278

机械工程学报 ›› 2024, Vol. 60 ›› Issue (23): 278-293.doi: 10.3901/JME.2024.23.278

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新型振动辅助粉末输送系统增材制造钴基合金/铜合金界面互锁结构

唐锦荣¹, 王迪¹, 刘林青¹, 谭华², 李扬¹, 周伟³, 陈国星⁴, 杨永强¹

1. 华南理工大学机械与汽车工程学院广州 510641;
2. 西北工业大学凝固技术国家重点实验室西安 710072;
3. 厦门大学机电工程系厦门 361005;
4. 苏州热工研究院有限公司苏州 215004

收稿日期:2023-12-13 修回日期:2024-06-08 出版日期:2024-12-05 发布日期:2025-01-23
作者简介:唐锦荣，男，1999年出生。主要研究方向为金属增材制造。E-mail：tangjr0228@163.com;王迪(通信作者)，男，1986年出生，博士，教授，博士研究生导师。主要研究方向为增材制造与激光加工技术开发与应用。E-mail：mewdlaser@scut.edu.cn
基金资助:
国家重点研发计划(2022YFB4600303)、国家自然科学基金(52073105)、广东省基础与应用基础研究基金(2022B1515120025)和中央高校基本科研业务费专项基金(2022ZYGXZR009)资助项目。

Additive Manufacturing of Co-based Alloy/copper Interface Interlocking Structures with a New Vibration-assisted Powder Delivery System

TANG Jinrong¹, WANG Di¹, LIU Linqing¹, TAN Hua², LI Yang¹, ZHOU Wei³, CHEN Guoxing⁴, YANG Yongqiang¹

1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641;
2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072;
3. Department of Mechanical &Electrical Engineering, Xiamen University, Xiamen 361005;
4. Suzhou Nuclear Power Research Institute, Suzhou 215004

Received:2023-12-13 Revised:2024-06-08 Online:2024-12-05 Published:2025-01-23

摘要/Abstract

摘要： 多材料激光粉末床熔融(Laser powder bed fusion,LPBF)成形过程中，高质量的粉末输送对于保证成形稳定性并提升零件的成形质量具有重要意义。设计了一种新型超声振动辅助粉末输送系统，分析了振动辅助模块的频率特征，并研究了针头直径对落粉效果的影响，通过0.3 mm直径的针头实现了稳定、良好的粉末输送效果。通过上述粉末输送系统LPBF成形三种具有不同界面互锁结构(齿形、正弦、矩形)的钴基合金/铜多材料零件，验证了该粉末输送系统的可行性。进一步研究了三种不同互锁结构的界面特征，分析了界面处宏观样貌、微观缺陷以及元素分布。结果表明，振动辅助模块在21 kHz频率下能正常落粉，成形零件界面出现了两种金属的混合区。齿形互锁结构的成形质量优于正弦与矩形结构，其界面处的材料结合良好。以上结果能为粉末输送系统设计以及金属多材料界面结构设计提供参考。

关键词: 激光粉末床熔融, 多材料, 粉末输送, 互锁结构

Abstract: In the process of multi-material laser powder bed fusion (LPBF), a high-quality powder delivery is critical for the stability of the LPBF process and enhancing the quality of parts. A new type of ultrasonic vibration-assisted powder delivery system is designed. The frequency characteristics of the vibration-assisted module and the effect of needle diameter on powder dropping are investigated. A needle with a size of 0.3 mm is demonstrated to achieve the stale and well powder delivery. Three types of Co-based alloy/copper multi-material parts with different interlocking structures (i.e., sawtooth, sine, and rectangle) are fabricated by LPBF using the ultrasonic vibration-assisted powder delivery system, demonstrating the feasibility of the powder delivery system. Subsequently, the interface characteristics of three types of multi-material parts are investigated to analyze the macroscopic morphology, defects and the element distribution at the interface. The results show that the powder can be delivered stably with a frequency of 21 kHz by the vibration-assisted module. A mixing area of two materials are found at the interface of the multi-material parts. The forming quality of the sawtooth-shaped interlocking structure is higher than that of the sine- and rectangle- shaped interlocking structures, which showing a good interfacial bonding. The results may provide reference for the design of the powder delivery system and the metal multi-material interface structure.

Key words: laser powder bed fusion, multi-material, powder delivery, interlocking structure

中图分类号:

TG665

唐锦荣, 王迪, 刘林青, 谭华, 李扬, 周伟, 陈国星, 杨永强. 新型振动辅助粉末输送系统增材制造钴基合金/铜合金界面互锁结构[J]. 机械工程学报, 2024, 60(23): 278-293.

TANG Jinrong, WANG Di, LIU Linqing, TAN Hua, LI Yang, ZHOU Wei, CHEN Guoxing, YANG Yongqiang. Additive Manufacturing of Co-based Alloy/copper Interface Interlocking Structures with a New Vibration-assisted Powder Delivery System[J]. Journal of Mechanical Engineering, 2024, 60(23): 278-293.

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新型振动辅助粉末输送系统增材制造钴基合金/铜合金界面互锁结构

Additive Manufacturing of Co-based Alloy/copper Interface Interlocking Structures with a New Vibration-assisted Powder Delivery System

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