激光粉末床熔融技术制备双相不锈钢研究进展-中国材料进展

文章信息/Info

Title:: Research Advance in Preparation of Duplex Stainless Steel by Laser Powder Bed Melting Technology

作者:: 潘万枫; 李尚; 张健; 董选普; 刘鑫旺; 计效园; 向红亮; 曹华堂; 1. 华中科技大学材料科学与工程学院，湖北武汉 430074 2. 华中科技大学材料成形与模具技术全国重点实验室，湖北武汉 430074 3. 福州大学机械工程及自动化学院, 福建福州 350108 4. 三明医学科技职业学院, 福建三明 365000

Author(s):: Pan Wanfeng; Zhang Jian; Li Shang; Dong xuanpu; Liu Xinwang; Ji Xiaoyuan; Xiang Hongliang; Cao Huatang; 1. School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China 2. National Key Laboratory of Material Forming and Die Technology, Wuhan 430074, China et al.

Keywords:: laser powder bed fusion; duplex stainless steel; mechanical properties; tribological properties; corrosion resistance; microstructure

摘要:: 双相不锈钢（DSS）因其优异的综合性能，在海洋、化工等领域得到广泛应用。传统方法制造DSS具有形状受限、成本高、材料利用率较低的缺点，激光粉末床熔融（LPBF）技术因其高精度和适合制造复杂几何形状的能力而备受关注，为制备高性能、复杂结构的双相不锈钢提供了新的途径。该方式制备的DSS微观结构以铁素体为主，晶粒细小（1~10 μm），通过调整工艺参数和热处理可优化两相比。在力学性能方面表现出高硬度和抗拉强度，但延展性、疲劳强度和耐摩擦性较低，可通过合适的热处理工艺进一步改善。其耐腐蚀性与传统双相不锈钢相当，钝化膜较厚，但受孔隙和合金元素蒸发的影响较大。未来研究应聚焦于合金设计、工艺优化和数值模拟，以进一步提升LPBF DSS的综合性能并推动其在航空航天、石油化工、能源及生物医疗等领域的工业化应用。

Abstract:: Duplex stainless steel (DSS) is widely used in marine, chemical and other fields due to its excellent comprehensive performance. The traditional method to manufacture DSS has the disadvantages of limited shape, high cost and low material utilization. The laser powder bed fusion (LPBF) technology has received increasingly attention due to its high accuracy and the ability to manufacture complex geometries, which provides a new way to prepare DSS with high performance and complex structure. The microstructure of DSS prepared by this method mainly consists of ferrite with fine grain (1~10 μm). The proportion of phases can be optimized by adjusting process parameters and heat treatment. LPBF DSS exhibits high hardness and tensile strength in terms of mechanical properties, but low ductility, fatigue strength and friction resistance which can be further improved by suitable heat treatment. Corrosion resistance of LPBF DSS is comparable to that of conventional DSS, with a thick passive film, but is significantly influenced by porosity and evaporation of alloy elements. Future research should focus on alloy design, process optimization and numerical simulation to improve the comprehensive performance of LPBF DSS and promote its extensive industrial applications in aerospace, petrochemical, energy and biomedical fields.