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本文研究了Fe-Mn-Al奥氏体、铁素体复相钢淬火、回火过程中的相转变.金相观察认为,不同温度下的δ-铁素体,在淬火冷却过程中产生了三种形式转变,即分解、无扩散切变及以魏氏组织花样形式向奥氏体转变.对经退火及1250℃淬火状态的试验钢,用X射线衍射相分析得到,在铁素体内存在着Fe_3Al长程及短程序.根据电子探针相成份的测定结果,可认为铁素体内Al、Si的富集,是形成Fe_3Al相的原因.文中对淬火过程铁素体的相变机制进行了初步分析.
In this paper, the phase transformation during the quenching and tempering of Fe-Mn-Al austenite and ferritic duplex steel was studied.The metallographic observation shows that δ-ferrite at different temperatures produced during quenching and cooling Three forms of transformation, that is, decomposition, non-proliferation shear change and to Wei austenite pattern changes to austenite.The annealed and 1250 ℃ quenched state of the test steel, by X-ray diffraction phase analysis obtained in the presence of ferrite According to the determination results of the phase composition of the electron probe, the enrichment of Al and Si in the ferrite is considered as the reason for the formation of Fe_3Al phase. The phase transition mechanism of ferrite during quenching is preliminary studied analysis.