Fe-20Cr-5Al合金选区激光熔化增材制造工艺、热处理及性能研究

倪小南; 明亮; 胡子健; 杨温鑫; 王安森; 邓欣

doi:10.3969/j.issn.1674-6457.2025.07.017

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精密成形工程 ›› 2025, Vol. 17 ›› Issue (7) : 153-163. DOI: 10.3969/j.issn.1674-6457.2025.07.017

增材制造

Fe-20Cr-5Al合金选区激光熔化增材制造工艺、热处理及性能研究

倪小南¹, 明亮¹, 胡子健¹, 杨温鑫¹, 王安森¹, 邓欣^1,2,*

作者信息 +

Selective Laser Melting Additive Manufacturing, Heat Treatment and Property Study of Fe-20Cr-5Al Alloy

NI Xiaonan¹, MING Liang¹, HU Zijian¹, YANG Wenxin¹, WANG Ansen¹, DENG Xin^1,2,*

Author information +

文章历史 +

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824.8 MPa,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1 000 ℃下的氧化速率为0.042 g/(m²·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。

Abstract

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 engineering 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 exhibited 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 oxidation rate of 0.042 g/(m²·h) at 1 000 ℃, 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.

导出引用

倪小南, 明亮, 胡子健, 杨温鑫, 王安森, 邓欣. Fe-20Cr-5Al合金选区激光熔化增材制造工艺、热处理及性能研究[J]. 精密成形工程. 2025, 17(7): 153-163 https://doi.org/10.3969/j.issn.1674-6457.2025.07.017

NI Xiaonan, MING Liang, HU Zijian, YANG Wenxin, WANG Ansen, DENG Xin. Selective Laser Melting Additive Manufacturing, Heat Treatment and Property Study of Fe-20Cr-5Al Alloy[J]. Journal of Netshape Forming Engineering. 2025, 17(7): 153-163 https://doi.org/10.3969/j.issn.1674-6457.2025.07.017

中图分类号： TN146.2

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