Study on Transformation Mechanism in Bainite and Martensite Transformation Ranges for Si-Mn Steel by Magnetic Analysis
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چکیده
منابع مشابه
Mechanism of Bainite Transformation in Fe-Cr-Mo-V-Ti-C Steel
The kinetics and mechanism of bainite transformation have been studied in Fe-Cr-Mo-V-Ti-C steel high speed dilatometry backed by thermodynamic analysis. The complete transformation of austenite, however, has not occurred at any reported temperature. Obtained results confirm the incomplete reaction phenomenon with the cessation of the bainite transformation well before the paraequilibrium is ach...
متن کاملEffects of Bainitic Transformation Temperature on Microstructure and Tensile Properties of 0.6C-Si-Mn Steel
1 緒 言 工具や軸受,ゲ ージなどの精密部品では残留オーステ ナイ ト(rR)が存在すると硬 さや疲労寿命の低下,切 削性 不良あるいは経年形状変化を招きそれらの性質に有害な 影響をもたらす.そ れゆえ,こ れ らに使用する鋼では rRを 極力減少させ るのが好 ましい.し か しなが ら,rR が低合金構造用鋼に存在する場合には延性やじん性が向 上するとともに低温におけるぜい性破壊の防止に役立つ 場合が多い.そ れゆえ,最 近進んで熱処理によって人 為的にrRの 量や存在形態を調整 し混合組織 として優れ た機械的性質 を得ようとす る研究が しばしば見受 けら れ1)~6)る.こ のようなrRを 積極的に利用 しようとする方法 として,近 年Si-Mn鋼 をベイナイ ト変態させるオース テンパー処理が注 目されている. Si-Mn鋼 をベイナイ ト変態 させた場合多量のrRが ...
متن کاملTransformation potential predictions for the stress-induced austenite to martensite transformation in steel
The stress-induced transformation behavior of retained austenite is considered in this work. With the development of transformationinduced plasticity (TRIP) steels this deformation mode is of growing importance. Twinned martensite structures were calculated using the crystallographic theory of martensite. An available work criterion was used to predict the transformation potentials for 16 diffe...
متن کاملReal-time synchrotron X-ray diffraction study on the isothermal martensite transformation of maraging steel in high magnetic fields
MATERALIA Group, Department of Physical Metallurgy, Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC), Avenida Gregorio del Amo 8, 28040 Madrid, Spain, Fundamental Aspects of Materials and Energy, Faculty of Applied Sciences, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands, Dalton Cumbrian Facility, University of Manchester, Westlakes Science and Technolog...
متن کاملDrawing CCCT Diagrams and Investigation of Deformation Effects on Martensite and Bainite Trabsformations in NiCrMoV Steel
In this study, two CCCT diagrams are drawn to be compared with a CCT diagram. The CCCT diagrams represent continuous cooling transformations in stress assisted state. The increased Md and Bd temperatures of CCCT diagrams were also compared with those of the CCT diagrams and the cause was investigated from both thermodynamic and metallurgical viewpoints. Thermodynamic examinations revealed that ...
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ژورنال
عنوان ژورنال: Journal of the Japan Institute of Metals and Materials
سال: 1953
ISSN: 0021-4876,1880-6880
DOI: 10.2320/jinstmet1952.17.11_552