摘要
选区激光熔化(selective laser melting,SLM)技术成形的零件不仅有快速凝固的组织特征,同时还可以制备形状复杂的结构件,因此SLM技术在航空航天、汽车及医疗等领域有着广泛的应用。本文利用SLM技术制备了20%SiC颗粒增强AlSi10Mg的复合材料,研究不同扫描速度和激光功率对成形件的显微组织和力学性能的影响规律。结果表明,成形零件的硬度随着不同的激光功率在160~175 HV之间变化;当扫描速率为1000 mm/s时,随着激光功率的升高,材料的硬度逐渐升高,在410 W时达到峰值172.3 HV;而当扫描速率为1200 mm/s时,随着激光功率的升高,硬度变化幅度较大,在390 W时硬度最大达到171.2 HV。同时,在激光功率390 W,扫描速度1200 mm/s时,试样内部的裂纹和孔洞较少,SiC颗粒在铝基体中分布均匀,与铝基体有理想熔合界面。
Parts formed via selective laser melting(SLM)technology exhibit rapid solidification characteristics while enabling the fabrication of complex geometries,making it widely applicable in the aerospace,automotive,and medical fields.Thus,a 20 vol.%SiC particle-reinforced AlSi10Mg composite was developed via SLM to investigate how varying scanning speeds and laser powers affect microstructure and mechanical properties.The results indicate that the hardness fluctuates between 160~175 HV depending on the laser power.At the 1000 mm/s scanning speed,the hardness of the material gradually increases,reaching a peak of 172.3 HV at 410 W.However,at the 1200 mm/s scanning speed,the hardness significantly varies,reaching a maximum of 171.2 HV at 390 W.Notably,the samples processed at 390 W and 1200 mm/s present fewer internal cracks and pores,with SiC particles uniformly distributed within the aluminium matrix and forming an ideal fusion interface.
作者
吴怡星
刘永勤
高志明
康祥晋
郭茹萍
职希玉
朱满
WU Yixing;LIU Yongqin;GAO Zhiming;KANG Xiangjin;GUO Ruping;ZHI Xiyu;ZHU Man(School of Materials and Chemical Engineering,Xi'an Technological University,Xi'an 710016,China;College of Mechanical Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)
出处
《铸造技术》
2026年第2期182-188,共7页
Foundry Technology
基金
陕西省重点研发计划(2025CY-YBXM-021)。
