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铝合金气缸盖增材制造试验研究
Experiment & Research on Additive Manufacturing of Aluminium Alloy Cylinder Head
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- DOI:
- 作者:
- 岳畅 王新节
YUE Chang;WANG Xinjie
- 作者单位:
- 浙江大学城市学院
City College of Zhejiang University, Hangzhou 310015,China
- 关键词:
- 铝合金气缸盖 增材制造 热处理 力学性能
aluminium alloy cylinder head additive manufacturing heat treatment mechanical properties
- 摘要:
- 采用选择性激光烧结成形增材制造技术制备AlSi10Mg发动机气缸盖,对比测试了气缸盖产品和拉伸试棒在T6热处理前后的硬度、抗拉强度和断后伸长率的变化。利用激光粒度仪对AlSi10Mg粉末的粒度尺寸分布特征和粒形形貌表征的检测分析,借助金相显微镜和扫描电子显微镜对气缸盖的微观组织特征、共晶硅晶粒和固溶体晶粒的大小进行研究,并对其组织形貌与力学性能之间的对应关系进行了分析探讨。结果表明,热处理前后AlSi10Mg增材制造产品的硬度、抗拉强度和伸长率分别为126 HBW、445 MPa、6.5%和85.8 HBW、335 MPa、11%。The AlSi10Mg aluminium alloy engine cylinder head was prepared by selective laser sintering additive manufacturing process. The variation data of hardness, tensile strength and elongation after fracture of cylinder head and tensile bar before and after T6 heat treatment were compared and tested. The particle size distribution characteristics and particle shape characterization of AlSi10Mg powder were detected and analyzed by laser particle size analyzer.Microstructure characteristics, eutectic silicon grain size and solid solution grain size of cylinder head were studied by means of metallographic microscope and SEM. The corresponding relationship between the microstructure and mechanical properties was discussed. The results show that the hardness, tensile strength and elongation of AlSi10Mg additive products before and after heat treatment are 126 HBW, 445 MPa, 6.5% and 85.8 HBW, 335 MPa, 11%, respectively.