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激光粉末床熔融制备316L不锈钢生物材料的制造、微观结构与力学性能

Manufacturing, Microstructure, and Mechanics of 316L SS Biomaterials by Laser Powder Bed Fusion.

作者信息

Zhang Zhizhou, Mativenga Paul, Huang Shi-Qing

机构信息

School of Mechanics and Construction Engineering, Jinan University, Guangzhou 510632, China.

Laser Processing Research Laboratory, School of Engineering, The University of Manchester, Manchester M13 9PL, UK.

出版信息

J Funct Biomater. 2025 Jul 31;16(8):280. doi: 10.3390/jfb16080280.

DOI:10.3390/jfb16080280
PMID:40863300
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12387571/
Abstract

Laser powder bed fusion (LPBF) is an advanced additive manufacturing technology that is gaining increasing interest for biomedical implants because it can produce dense, patient-specific metallic components with controlled microstructures. This study investigated the LPBF fabrication of 316L stainless steel, which is widely used in orthopedic and dental implants, and examined the effects of laser power and scanning speed on the microstructure and mechanical properties relevant to biomedical applications. The study achieved 99.97% density and refined columnar and cellular austenitic grains, with optimized molten pool morphology. The optimal LPBF parameters, 190 W laser power and 700 mm/s, produced a tensile strength of 762.83 MPa and hardness of 253.07 HV, which exceeded the values of conventional cast 316L stainless steel. These results demonstrated the potential of optimized LPBF 316L stainless steel for functional biomedical applications that require high mechanical integrity and biocompatibility.

摘要

激光粉末床熔融（LPBF）是一种先进的增材制造技术，因其能够制造出具有可控微观结构的致密、个性化金属部件，在生物医学植入物领域越来越受到关注。本研究对广泛应用于骨科和牙科植入物的316L不锈钢进行了LPBF制造研究，并考察了激光功率和扫描速度对与生物医学应用相关的微观结构和力学性能的影响。该研究实现了99.97%的密度，并细化了柱状和胞状奥氏体晶粒，同时优化了熔池形态。最佳的LPBF参数，即190W激光功率和700mm/s扫描速度，产生了762.83MPa的抗拉强度和253.07HV的硬度，超过了传统铸造316L不锈钢的数值。这些结果证明了优化后的LPBF 316L不锈钢在需要高机械完整性和生物相容性的功能性生物医学应用中的潜力。

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