摘要
目的探索FeCrAl合金在增材制造中的应用潜力,通过选区激光熔化(SLM)技术优化其工艺参数,以改善合金的微观结构、力学性能及抗氧化特性,为工程应用提供理论支持和实践指导。方法采用响应曲面方法(RSM)对SLM工艺参数进行优化,以确定最佳工艺条件,采用SLM技术对Fe-20Cr-5Al合金进行打印。结果在优化的工艺条件下,SLM打印的Fe-20Cr-5Al合金的相对密度达到了98.6%。未经热处理的合金抗拉强度为824.8MPa,延伸率为12.3%;热处理后,抗拉强度略有降低,但延伸率提升至20.5%。此外,该合金在800℃条件下展现出完全的抗氧化性,在1000℃下的氧化速率为0.042 g/(m^(2)·h),且在氧化时间不超过80 h的情况下,仍保持良好的抗氧化性能。结论通过优化SLM工艺参数,为FeCrAl合金在增材制造中的应用提供了重要的理论依据和实践指导,展示了该合金在高温环境下的优越性能。
The work aims to explore the application potential of FeCrAl alloys in additive manufacturing,particularly through optimizing process parameters with Selective Laser Melting(SLM)technology,in order to improve the microstructure,mechanical properties,and oxidation resistance of the alloy,thereby providing theoretical support and practical guidance for en-gineering applications.Based on the Response Surface Methodology(RSM),the SLM process parameters were optimized to determine the best processing conditions,and the Fe-20Cr-5Al alloy was printed with SLM technology.Under the optimized processing conditions,the relative density of the Fe-20Cr-5Al alloy printed by SLM reached 98.6%.The as-printed alloy exhib-ited a tensile strength of 824.8 MPa and an elongation of 12.3%.After heat treatment,the tensile strength slightly decreased,but the elongation increased to 20.5%.Furthermore,the alloy demonstrated complete oxidation resistance at 800℃,with an oxida-tion rate of 0.042 g/(m^(2)·h)at 1000℃,and maintained good oxidation resistance even after 80 hours of oxidation.Through the optimization of SLM process parameters,this study provides important theoretical and practical guidance for the application of FeCrAl alloys in additive manufacturing,demonstrating the superior performance of the alloy in high-temperature environments and its promising prospects for engineering applications.
作者
倪小南
明亮
胡子健
杨温鑫
王安森
邓欣
NI Xiaonan;MING Liang;HU Zijian;YANG Wenxin;WANG Ansen;DENG Xin(School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China;Guangdong Metal Ceramic 3D Technology Co.,Ltd.,Guangdong Foshan 528225,China)
出处
《精密成形工程》
北大核心
2025年第7期153-163,共11页
Journal of Netshape Forming Engineering
基金
2019佛山市科技创新团队项目(FS0AA-KJ919-4402-0023)
阳江市引进创新科研团队项目(RCZX2024003)
云浮产学研项目(220627155594664)。
