与传统的马 氏体双相（ FMDP ）钢相比，铁素体／贝氏体双相 （ FBDP ）钢能够很好地兼顾材料的强度和延伸 性，并且具有良好的焊接性能、疲劳性能以及扩孔 性能，主要用于制作汽车车轮、底盘等结构件...
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其经预先退火得到全部铁素体组织，然后等温淬火得到铁素体和贝氏体双相组织的基体。
The ferrite is obtained first through annealing, then biphase structure of ferrite and bainite is obtained through isothermal quenching.
经适当热处理，获得贝氏体铁素体板条与奥氏体薄膜交替排列的奥氏体-贝氏体双相组织。
After proper heat treatment the steel will have a dual phase structure of austenite and bainite. arranged alternatively in the form of lath ferrite and thin film austenite.
试验证明，当焊缝组织为下贝氏体及板条马氏体双相组织时，能有效地提高焊条的抗裂性能。
The experimental result shows that the cracking resistance can be increased effectively as dual-phase structure existed in the layer consisting of lower bainite and lath martensite.
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