Process and properties of selective laser sintering ultrahigh molecular weight polyethylene

XIAO Ze-feng; YANG Yong-qiang; SONG Chang-hui; ZHENG Xiao-jian; YU Jia-kuo

doi:10.3788/OPE.20162403.0502

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Process and properties of selective laser sintering ultrahigh molecular weight polyethylene

Modern Applied Optics | 更新时间：2020-08-13

- Process and properties of selective laser sintering ultrahigh molecular weight polyethylene
- Optics and Precision Engineering Vol. 24, Issue 3, Pages: 502-510(2016)
- 作者机构：
  
  1. 华南理工大学机械与汽车工程学院,广东广州,510640
  2. 北京大学第三医院运动医学研究所北京,100083
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162403.0502
  CLC： TB32;TN249
- Received：16 October 2015，
  
  Revised：07 December 2015，
  
  Published：25 March 2016
- 稿件说明：
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肖泽锋, 杨永强, 宋长辉等. 激光选区烧结超高分子量聚乙烯工艺及性能[J]. 光学精密工程, 2016,24(3): 502-510

XIAO Ze-feng, YANG Yong-qiang, SONG Chang-hui etc. Process and properties of selective laser sintering ultrahigh molecular weight polyethylene[J]. Editorial Office of Optics and Precision Engineering, 2016,24(3): 502-510
肖泽锋, 杨永强, 宋长辉等. 激光选区烧结超高分子量聚乙烯工艺及性能[J]. 光学精密工程, 2016,24(3): 502-510 DOI： 10.3788/OPE.20162403.0502.

XIAO Ze-feng, YANG Yong-qiang, SONG Chang-hui etc. Process and properties of selective laser sintering ultrahigh molecular weight polyethylene[J]. Editorial Office of Optics and Precision Engineering, 2016,24(3): 502-510 DOI： 10.3788/OPE.20162403.0502.

摘要

研究了激光选区烧结(SLS)成型工艺中不同工艺参数以及后续热处理工艺对超高分子量聚乙烯(UHMWPE)材料成型性能的影响。通过调整扫描间距、激光功率、扫描速度等不同工艺参数

描述了SLS成型UHMWPE零件的致密度、拉伸强度以及断裂伸长率

并对热处理前后的SLS成型UHMWPE零件的力学性能进行了比较。结果显示

致密度、拉伸强度、断裂伸长率总体上与激光功率呈正相关关系

与扫描间距、扫描速度呈负相关关系。经热处理后

SLS成型UHMWPE零件的力学性能有明显提高

致密度达到95.12%

抗拉强度达到24.08 MPa

断裂伸长率达到334.82 MPa。实验结果表明:SLS成型UHMWPE零件与模塑成型UHMWPE零件性能尚有差距

仅优化成型工艺不足以得到理想性能

但经热处理后

零件性能基本满足使用要求。

Abstract

The effects of different processing parameters in Selective Laser Sintering(SLS) and subsequent heat treatment on the mechanical properties of Ultrahigh Molecular Weight Polyethylene(UHMWPE) specimens were investigated. By adjusting the different processing parameters

such as scanning space

scanning speed and laser power

the density

tensile strength and breaking elongation of UHMWPE specimens fabricated by SLS were described

then the mechanical properties of the UHMWPE specimens with and without heat treatments were compared. The experimental result demonstrates that the relative density

tensile strength and the breaking elongation have a positive correlation with the laser power and have a negative correlation with the scanning space and scanning speed. After heat treating

the mechanical properties of the UHMWPE specimens are improved obviously and the relative density

tensile strength and the breaking elongation are 95.12%

24.08 MPa

and 334.82 MPa respectively. These results suggest that the mechanical properties of UHMWPE specimens fabricated by SLS is weaker than that fabricated by molding. Process optimization can not get the ideal performance

but the mechanical property can be enhanced to meet the requirements after heat treatment.

关键词

Keywords

references

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