Influence of Cooling Rate on Formation of Structural and Textural States in Ferritic-Martensitic Stainless Steel with 12 wt.% Chromium

IF 0.5 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metal Science and Heat Treatment Pub Date : 2025-07-29 DOI:10.1007/s11041-025-01121-w

V. I. Pastukhov, A. E. Ustinov, V. Y. Yarkov, S. V. Solov’yeva, M. L. Lobanov

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Abstract

The structural and textural states formed in samples of stainless steel of the ferritic-martensitic class, close in composition to Cr12NiMoWoSiVNb, are studied by the method of scanning electron microscopy using orientation analysis and software for reconstruction of high-temperature austenitic grains. The samples are taken from a hot-rolled pipe that has been quenched in water and tempered at a high temperature. The samples are heat treated by holding at 950°C and cooling at different rates (in water, in air, in the furnace). At all the cooling rates, the steel structure consists of grains of δ-ferrite and martensite and contains coarse precipitates of (NbMo)(CN) carbonitrides and finer M₂₃C₆ and (VNb)C carbides. When the phase transformations occur in the sequence δ + α′ → δ + γ → δ + α′, the steel inherits structural and textural features due to nucleation of a new phase on special boundaries.

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冷却速率对含12wt .%铬铁素体-马氏体不锈钢组织和织构形成的影响

采用扫描电镜、取向分析和高温奥氏体晶粒重建软件，研究了成分接近Cr12NiMoWoSiVNb的铁素体-马氏体类不锈钢试样的组织和织构状态。样品取自在水中淬火并在高温下回火的热轧管。样品在950°C的温度下进行热处理，并以不同的速度冷却（在水中，在空气中，在炉中）。在所有冷却速率下，钢组织由δ-铁素体和马氏体晶粒组成，含有（NbMo）（CN）碳氮化物的粗相和M23C6和（VNb）C碳化物的细相。当相变顺序为δ + α′→δ + γ→δ + α′时，由于在特定边界上形成了新相的形核，钢的组织和织构特征得以保留。

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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.