Benefits of Intercritical Annealing in Quenching and Partitioning Steel
Benefits of Intercritical Annealing in Quenching and Partitioning Steel
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DOI：
10.1007/s11661-018-4559-6
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发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
X. Wang;L. Liu;R. Liu;M. Huang
中科院分区：
文献类型：
--
作者：
X. Wang;L. Liu;R. Liu;M. Huang
与全奥氏体化退火生产的Q&P钢相比，亚温退火生产的Q&P钢显示出相似的极限拉伸应力，但具有更大的拉伸塑性。这是由于亚温退火后残余奥氏体的体积分数增加，力学稳定性提高。此外，亚温退火在显微组织中产生更多的铁素体和更少的马氏体相，从而对更高的加工硬化率和因此更好的拉伸延展性做出额外的贡献。
Compared to the quenching and partitioning (Q&P) steel produced by full austenization annealing, the Q&P steel produced by the intercritical annealing shows a similar ultimate tensile stress but a larger tensile ductility. This property is attributable to the higher volume fraction and the better mechanical stability of the retained austenite after the intercritical annealing. Moreover, intercritical annealing produces more ferrite and fewer martensite phases in the microstructure, making an additional contribution to a higher work hardening rate and therefore a better tensile ductility.