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首页> 外文会议>Asia steel international conference >Effect of Boron Addition on the Transformation Behavior of Upp er Bainite in Low-carbon,Cr-Mo steel
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Effect of Boron Addition on the Transformation Behavior of Upp er Bainite in Low-carbon,Cr-Mo steel

机译：硼添加对低碳，Cr-Mo钢upp er Bainite转化行为的影响

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The role of B on the isothermal bainitic transformation in low-C,lean-alloyed steel was investigated.B clearly affected both the transformation kinetics and the morphology of isothermally transformed bainite.The microstructure of bai nite formed at 500°C consisted of a bainitic ferrite matrix and the martensite/austenite constituent.Whereas the martensite/ austenite constituent had an elongated morphology in B-free steel,the martensite/austenite constituents in the B-added steel had a granular morphology.Two types of bainite unit nucleation were considered:the initial nuclei and the nuclei formed on previously formed units.The nuclei of the bainite transformation in the B-added steel were confined to the austenite grain interior,and the bainitic ferrite nuclei had crystallographic orientations limited to K-S variants within a same Bain v ariant.The characteristic bainite microstructure in B-added steel is due to the inhibition of the bainitic ferrite nucleation at austenite grain boundaries.
机译：研究了B对低C，依赖合金钢等温贝氏体转化的作用.B清楚地影响了转化动力学和等温转化的贝氏体的形态。在500℃下形成的白液的微观结构由贝氏体组成铁氧体基质和马氏体/奥氏体成分。马氏体/奥氏体成分在B-Free钢中具有细长的形态，B-加入钢中的马氏体/奥氏体成分具有颗粒形态。考虑了WO类型的贝氏体单位成核：在先前形成的单元上形成的初始核和核。BAINATE钢中贝氏体转化的核限制在奥氏体晶粒内部，并且伯特铁素核具有限制在同一贝氏V ARIANT内的KS变体的晶体取向。B加入钢中的特征贝氏体微观结构是由于奥氏体晶粒染色的贝氏体铁氧体成核的抑制白羊座。

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