Application of the quenching and partitioning (Q&P) process to a medium-carbon, high-Si microalloyed bar steel
Application of the quenching and partitioning (Q&P) process to a medium-carbon, high-Si microalloyed bar steel
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DOI：
10.4028/www.scientific.net/msf.426-432.1089
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发表时间：
2003-01-01
期刊：
影响因子：
--
通讯作者：
Speer, JG
中科院分区：
文献类型：
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作者：
Matlock, DK;Bräutigam, VE;Speer, JG
最近，一种被称为淬火和分配(Q&P)的新工艺被提出，用于在室温下生产体积分数可控的富碳残余奥氏体钢。综述了Q&P工艺的基本特点，给出了0.35C、1.3Mn、0.74Si微合金化棒材的生产结果。样品被奥氏体化，在不同的淬火温度下淬火到锡铋浴中，并在称为分配温度的温度下保持不同的时间。对组织进行了分析，并用X射线衍射仪对室温残余奥氏体量进行了表征。结果表明，奥氏体室温残余体积分数与淬火温度、分配温度和分配时间有关。这些结果与预测进行了比较，并考虑了Q&P处理对新产品开发机会的影响。
Recently a new process referred to as quenching and partitioning (Q&P), was proposed to produce steels with controlled volume fractions of carbon-enriched retained austenite at room temperature. The basic features of the Q&P process are reviewed and results on a 0.35C, 1.3 Mn, 0.74 Si microalloyed bar steel are presented. Samples were austenitized, quenched into a tinbismuth bath at various quench temperatures, and held for various times at temperatures referred to as the partitioning temperatures. Microstructures were assessed, and the amount of retained austenite at room temperature was characterized using x-ray diffraction. The volume fraction of austenite retained at room temperature was shown to depend on the quench temperature, partitioning temperature, and partitioning time. These results are compared to predictions, and implications of Q&P processing on new product development opportunities are considered.