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首页> 外文期刊>Metals >Influence of Solution Treatment Temperature on Microstructural Properties of an Industrially Forged UNS S32750/1.4410/F53 Super Duplex Stainless Steel (SDSS) Alloy
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Influence of Solution Treatment Temperature on Microstructural Properties of an Industrially Forged UNS S32750/1.4410/F53 Super Duplex Stainless Steel (SDSS) Alloy

机译：固溶温度对工业锻造UNS S32750 / 1.4410 / F53超级双相不锈钢（SDSS）合金的组织性能的影响

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In this present study, the influence of solution annealing temperature on microstructural properties of a forged Super Duplex Stainless Steel (SDSS) was investigated by SEM-BSE (Scanning Electron Microscopy-Backscattered Electrons) and SEM-EBSD (Scanning Electron Microscopy-Electron Backscatter Diffraction) techniques. A brief solution treatment was applied to the forged super duplex alloy, at different temperatures between 800 °C and 1100 °C, with a constant holding time of 0.6 ks (10 min). Microstructural characteristics such as nature, weight fraction, distribution and morphology of constituent phases, average grain-size and grain misorientation were analysed in relation to the solution annealing temperature. Experimental results have shown that the constituent phases in the SDSS alloy are δ-Fe, γ-Fe and σ (Cr-Fe) and that their properties are influenced by the solution treatment temperature. SEM examinations revealed microstructural modifications induced by the Cr rich precipitates along the δ/γ and δ/δ grain boundaries, which may significantly affect the toughness and the corrosion resistance of the alloy. Solution annealing at 1100 °C led to complete dissolution of σ (Cr-Fe) phase, the microstructure being formed of primary δ-Fe and γ-Fe. The orientation relationship between δ/δ, γ/γ and δ/γ grains was determined by electron back scattering diffraction (EBSD). Both primary constituent phase’s microhardness and global microhardness were determined.
机译：在本研究中，通过SEM-BSE（扫描电子显微镜-背散射电子）和SEM-EBSD（扫描电子显微镜-电子背散射衍射）研究了固溶退火温度对锻造超级双相不锈钢（SDSS）的组织性能的影响。 ）技术。在800°C和1100°C之间的不同温度下，对锻造的超级双相合金进行了短暂的固溶处理，保持时间为0.6 ks（10分钟）。分析了与固溶退火温度有关的微观结构特征，例如性质，重量分数，组成相的分布和形态，平均晶粒尺寸和晶粒取向不良。实验结果表明，SDSS合金的组成相为δ-Fe，γ-Fe和σ（Cr-Fe），其性质受固溶处理温度的影响。 SEM检查表明，富Cr沿δ/γ和δ/δ晶界的析出物引起的微观结构改变，可能会显着影响合金的韧性和耐蚀性。 1100°C的固溶退火导致σ（Cr-Fe）相完全溶解，其微观结构由原始δ-Fe和γ-Fe形成。 δ/δ，γ/γ和δ/γ晶粒之间的取向关系通过电子背散射衍射（EBSD）确定。确定了主要组成相的显微硬度和整体显微硬度。

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