加工对 2507 双相不锈钢铸件微观结构、机械性能和断裂行为的影响

IF 0.6 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metal Science and Heat Treatment Pub Date : 2024-09-19 DOI:10.1007/s11041-024-01042-0

S. K. Ghosh, Muralidhar Yadav

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引用次数: 0

摘要

研究了加工对铸造双相不锈钢 2507 的微观结构和机械性能的影响。研究发现，热轧钢的结构包含δ-铁素体和奥氏体（γ）带，这些带在 50%冷轧后会发生变化，形成更加细化和破碎的双相（γ +δ）微结构成分。由于时效处理过程中会发生再结晶，奥氏体晶粒得到了最有效的细化（最多 5 μm）。冷轧钢具有最大的强度和最小的伸长率。在 1040°C 进行热变形+固溶处理（水冷），以及在 1300°C 进行热变形+固溶处理（水冷），然后在 1000°C 进行等温时效处理后，可获得最佳的强度和延展性组合。这种处理方法可确保钢材具有良好的成型性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Influence of Processing on Microstructure, Mechanical Properties, and Fracture Behavior of a Cast 2507 Duplex Stainless Steel

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Influence of Processing on Microstructure, Mechanical Properties, and Fracture Behavior of a Cast 2507 Duplex Stainless Steel

The effect of processing on the microstructure and mechanical properties of cast duplex stainless steel 2507 is studied. It is established that the structure of hot-rolled steel contains δ-ferrite and austenite (γ) bands that change due to 50% cold rolling to form microstructural constituents of a more refined and fragmented nature of a duplex (γ +δ) phase. Austenite grains are most effectively refined (up to 5 μm) because of the recrystallization occurring during aging treatment. The cold-rolled steel has maximum strength and minimum elongation. The best combination of strength and ductility is achieved after hot deformation + solution treatment at 1040°C with water cooling and after hot deformation + solution treatment at 1300°C with water cooling followed by isothermal aging at 1000°C. Such processing ensures a good formability of the steel.

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来源期刊

Metal Science and Heat Treatment 工程技术-冶金工程

CiteScore

1.20

自引率

16.70%

发文量

102

审稿时长

4-8 weeks

期刊介绍： Metal Science and Heat Treatment presents new fundamental and practical research in physical metallurgy, heat treatment equipment, and surface engineering. Topics covered include: New structural, high temperature, tool and precision steels; Cold-resistant, corrosion-resistant and radiation-resistant steels; Steels with rapid decline of induced properties; Alloys with shape memory effect; Bulk-amorphyzable metal alloys; Microcrystalline alloys; Nano materials and foam materials for medical use.