人造石墨粉末选择性激光烧结成形工艺实验研究

doi:10.3969/j.issn.1004-132X.2020.15.011

中国机械工程 ›› 2020, Vol. 31 ›› Issue (15): 1838-1845.DOI: 10.3969/j.issn.1004-132X.2020.15.011

人造石墨粉末选择性激光烧结成形工艺实验研究

吴海华, 张成, 李亚峰, 刘力, 徐李杰

三峡大学机械与动力学院, 宜昌, 443002

收稿日期:2019-08-08 出版日期:2020-08-10 发布日期:2020-08-26
作者简介:吴海华,男,1970年生,博士、教授。主要研究方向为石墨增材制造及其工程应用技术。E-mail:wuhaihua@ctgu.edu.cn。
基金资助:
国家自然科学基金资助项目(51575313)

Experimental Study of SLS Processes for Artificial Graphite Powders

WU Haihua, ZHANG Cheng, LI Yafeng, LIU Li, XU Lijie

College of Mechanical & Power Engineering, China Three Gorges University, Yichang, Hubei, 443002

Received:2019-08-08 Online:2020-08-10 Published:2020-08-26

摘要/Abstract

摘要： 将选择性激光烧结技术应用于人造石墨粉末成形，探索其回收循环再利用的可能性。研究了球形石墨粉末的加入量对人造石墨/酚醛树脂混合粉末流动性和堆积密度的影响，确定了石墨3D打印材料配方组成；研究了激光功率、扫描速度、扫描间距和分层厚度等工艺参数对石墨原型件的成形精度和抗弯强度的影响，确定了各工艺参数的取值范围；最后通过正交实验确定了最优工艺参数组合，并快速制备了复杂石墨功能件，验证了新工艺的可行性。

关键词: 人造石墨粉末, 选择性激光烧结成形工艺, 混合粉末流动性, 工艺参数, 工艺参数组合

Abstract: SLS process was applied to artificial graphite powders, the possibility of recycling and reutilization was explored. Firstly, effects of different mass fractions of spherical graphite powders on the fluidity and bulk density of mixed powders were studied, thus the reasonable composition of graphites for 3D printing materials was determined. Secondly, effects of different process parameters of laser power, scanning speed, scanning spacing and layer thickness on directional dimensions and bending strength of samples were studied, the ranges of parameters were decised. Finally, the optimum process parameters were determined by orthogonal experiments, the complex graphite functional parts were fabricated quickly, and feasibility was verified.

Key words: artificial graphite powder, selective laser sintering (SLS) process, flexural strength of mixed powder, process parameter, combination of process parameter

中图分类号:

TH145.1

吴海华, 张成, 李亚峰, 刘力, 徐李杰. 人造石墨粉末选择性激光烧结成形工艺实验研究[J]. 中国机械工程, 2020, 31(15): 1838-1845.

WU Haihua, ZHANG Cheng, LI Yafeng, LIU Li, XU Lijie. Experimental Study of SLS Processes for Artificial Graphite Powders[J]. China Mechanical Engineering, 2020, 31(15): 1838-1845.

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http://www.cmemo.org.cn/CN/Y2020/V31/I15/1838

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人造石墨粉末选择性激光烧结成形工艺实验研究

Experimental Study of SLS Processes for Artificial Graphite Powders

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