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选区激光熔化制备 20%SiC 颗粒增强 铝基复合材料的工艺优化及性能研究
Study on the ProcessOptimization and Properties of 20 vol.% SiC Particle ReinforcedAluminium Matrix Composites Preparedby Selective Laser Melting
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- DOI:
- 作者:
- 吴怡星 1，刘永勤 1，高志明 2，康祥晋 1，郭茹萍 1，职希玉 1，朱满 1
WU Yixing1,LIU Yongqin1,GAO Zhiming2,KANG Xiangjin1,GUO Ruping1,ZHI Xiyu1,ZHU Man1
- 作者单位:
- 1. 西安工业大学 材料与化工学院，陕西 西安 710016；2. 西安科技大学 机械工程学院，陕西 西安 710054
1. School of Materials and Chemical Engineering, Xi'an Technological University , Xi'an 710016,China; 2. College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054,China
- 关键词:
- 选区激光熔化；SiCP 颗粒；Al 基复合材料；维氏硬度
selective laser melting; SiCP particles; Al-based composites; Vickers hardness
- 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 varyingscanning 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 1 000 mm/s scanning speed, the hardness of the material gradually increases, reaching a peak of 172.3 HV at 410 W. However, at the 1 200 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 1 200 mm/s present fewer internal cracks and pores, with SiC particles uniformly distributed within the aluminium matrix and forming an ideal fusion interface.