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首页> 外文期刊>ISIJ international >Effects of Partitioning of Manganese and Silicon during Intercritical Annealing on Transformation Behavior and Mechanical Properties of Low Alloyed TRIP-assisted Steel Sheets
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Effects of Partitioning of Manganese and Silicon during Intercritical Annealing on Transformation Behavior and Mechanical Properties of Low Alloyed TRIP-assisted Steel Sheets

机译：临界退火中锰和硅的分配对低合金TRIP辅助钢板相变行为和力学性能的影响

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摘要

The effects of partitioning of Mn and Si during intercritical annealing on the transformation behavior and mechanical properties of low alloyed TRIP-assisted steel sheets were investigated by using 0.17%C-1.5%Si-1.7%Mn steel. During intercritical annealing, Mn and Si concentrated in austenite and ferrite by partitioning, respectively. This partitioning of Mn and Si suppressed the bainite transformation during austempering and decreased the volume fraction of retained austenite and its C content. This is considered to be mainly because partitioning of Mn and Si shifted the T_(0)’ curve to the lower C concentration region and stopped the bainite transformation at a lower C concentration in residual austenite. The decrease in the volume fraction of retained austenite and its C content deteriorated the ductility of the low alloyed TRIP-assisted steel sheets. Although proper intercritical annealing is necessary in order to increase the C content in retained austenite, it should be noted that excessive intercritical annealing can deteriorate the ductility of low alloyed TRIP-assisted steel sheets by causing excessive partitioning of Mn and Si.
机译：采用0.17％C-1.5％Si-1.7％Mn钢，研究了临界退火中Mn和Si之间的分配对低合金TRIP辅助钢板的转变行为和力学性能的影响。在临界退火中，Mn和Si通过分配分别集中在奥氏体和铁素体中。 Mn和Si的这种分配抑制了奥氏体回火过程中的贝氏体转变，并降低了残余奥氏体的体积分数及其C含量。认为这主要是由于Mn和Si的分配使T_（0）’曲线向较低的C浓度区域移动，并且在较低的C浓度下残余奥氏体中停止了贝氏体转变。残余奥氏体的体积分数和其C含量的降低降低了低合金TRIP辅助钢板的延展性。尽管为了增加残留奥氏体中的C含量需要适当的临界退火，但应注意的是，过度的临界退火会引起Mn和Si的过度分配，从而降低低合金TRIP辅助钢板的延展性。

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