1.广州城市理工学院 机械工程学院,广州 510800
2.华南理工大学 汽车与机械工程学院,广州 510641
李卫珍,女,1977年生,湖南邵阳人,博士研究生,讲师;主要研究方向为智能制造、增材制造等;E-mail:lwz9977@163.com。
黄凌森,男,1993年生,广东广州人,实验师;主要研究方向为材料成形技术及装备自动化;E-mail:hlsam@qq.com。
收稿:2025-06-17,
修回:2025-09-28,
纸质出版:2026-02-15
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李卫珍,黄凌森,姜立标,等. 不同工艺参数对SLM成型不锈钢316L多孔结构的力学性能的影响[J]. 机械强度,2026,48(2):135-143.
LI Weizhen,HUANG Lingsen,JIANG Libiao,et al. Influence of different process parameters on the mechanical properties of porous structures of 316L stainless steel formed by SLM[J]. Journal of Mechanical Strength,2026,48(2):135-143.
李卫珍,黄凌森,姜立标,等. 不同工艺参数对SLM成型不锈钢316L多孔结构的力学性能的影响[J]. 机械强度,2026,48(2):135-143. DOI: 10.16579/j.issn.1001.9669.2026.02.016.
LI Weizhen,HUANG Lingsen,JIANG Libiao,et al. Influence of different process parameters on the mechanical properties of porous structures of 316L stainless steel formed by SLM[J]. Journal of Mechanical Strength,2026,48(2):135-143. DOI: 10.16579/j.issn.1001.9669.2026.02.016.
目的
2
为了获得力学性能接近人体骨骼性能的金属植入物,了解其激光熔融成型规律。
方法
2
首先,使用不锈钢316L对设计的孔隙率为80%的多孔菱形体结构进行选区激光熔化(Selective Laser Melting
SLM)打印成型;然后,对激光功率、扫描速度、扫描间距这3个因素,每个因素分别取3个不同大小的值,进行正交试验,获得9个样本;最后,对样本进行800 ℃退火,随后进行压缩试验。
结果
2
试验结果显示,维氏硬度的均值为210.34 HV;弹性模量的均值为4.84 GPa;屈服强度的均值为8.66 MPa;极限强度的均值为440.99 MPa。对维氏硬度、弹性模量及屈服强度影响最大的是激光功率,对抗压强度影响最大的是扫描间距。结果证实,该多孔结构的力学性能与弹塑性材料的力学性能相符,具有较高的硬度、强度,其弹性模量比致密材料减小了97.52%,与人体骨骼接近。该结论为金属植入物力学性能的研究提供了参考。
Objective
2
To obtain metal implants with mechanical properties close to those of human bone and to understand the laser melting forming mechanism.
Methods
2
First
porous rhombic structures with a designed porosity of 80% were fabricated using stainless steel 316L via selective laser melting. Second
orthogonal tests were conducted with three different values for each of the three process parameters: laser power
scanning speed
and hatch spacing
resulting in 9 samples. Finally
the samples were subjected to annealing at 800 ℃ followed by compression testing.
Results
2
The average Vickers hardness is 210.34 HV
the average elastic modulus is 4.84 GPa
the average yield strength is 8.66 MPa
and the average ultimate tensile strength is 440.99 MPa. Laser power has the most significant influence on Vickers hardness
elastic modulus
and yield strength
while hatch spacing has the most significant influence on compressive strength. The results indicate that the mechanical properties of this porous structure are consistent with those of elastoplastic materials
exhibiting high hardness and strength. Its elastic modulus is 97.52% lower than that of dense material
approaching that of human bone. This conclusion provides a reference for research on the mechanical properties of metal implants.
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