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首页> 外文期刊>Materials Science and Technology: MST: A publication of the Institute of Metals >Correlation between microstructure and mechanical properties of reduced activation modified F-82h ferritic martensitic steel
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Correlation between microstructure and mechanical properties of reduced activation modified F-82h ferritic martensitic steel

机译：还原活化改性F-82h铁素体马氏体钢的组织与力学性能的相关性

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摘要

Metallurgical characterisation of modified F - 82H steel was carried out. Microstructural studies together with mechanical testing were conducted on the steel in the as received state and after thermal aging in the temperature range 300 - 60℃ for periods up to 5000 h. In addition, precipitate development during creep tests at 600 and 650℃ was studied. During thermal aging, the general microstructure of the steel (tempered martensite with M{sub}23C{sub}6 precipitates) remained stable up to 500℃. However, at 550 and 600℃, in addition to the M{sub}23C{sub}6 carbides, Laves phase and precipitates with intermediate composition between carbides and Laves phase were observed. In terms of mechanical properties, the F - 82H modified steel exhibited the same values of hardness, ultimate tensile stress and 0-2% ( proof stress, and similar creep rupture strength, regardless of the material condition studied. In contrast, aging treatments at 550 and 600℃ caused a significant decrease in impact properties, essentially attributable to the Laves phase precipitation.
机译：对改性F-82H钢进行了冶金学表征。在接收状态下以及在300-60℃的温度范围内进行了5000 h的热时效后，对钢进行了显微组织研究和力学测试。此外，还研究了在600和650℃蠕变试验过程中沉淀物的形成。在热时效过程中，钢的一般组织（带有M {sub} 23C {sub} 6析出物的回火马氏体）在500℃以下仍保持稳定。然而，在550和600℃时，除了M {sub} 23C {sub} 6碳化物外，还观察到Laves相以及在碳化物和Laves相之间具有中间组成的析出物。在机械性能方面，无论所研究的材料条件如何，F-82H改性钢均具有相同的硬度，极限拉伸应力和0-2％（屈服应力）和类似的蠕变断裂强度值。 550和600℃导致冲击性能显着下降，这主要归因于Laves相沉淀。

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