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低碳Si-Mn系Q&P钢两相区的退火热处理工艺 被引量：7

Quenching and partitioning(Q&P) process in two-phase region of a low carbon Si-Mn steel
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摘要 研究一种新型的两相区不同退火温度的淬火和碳再分配热处理工艺对低碳硅-锰系Q&P钢的显微组织、精细结构的影响,并和奥氏体区退火的Q&P热处理工艺进行对比。通过SEM、TEM分析发现,采用两相区退火的Q&P工艺室温组织为板条马氏体、铁素体和薄膜状残留奥氏体。残留奥氏体以两种形态存在:处于马氏体板条间的薄膜状和位于原奥氏体晶界处的块状。两相区热处理后的Q&P钢,不仅抗拉强度高达1000 MPa以上,其伸长率也高达23%以上,体积分数高达11%的残留奥氏体在组织中起到了相变诱发塑性的作用。 Effect of a novel quenching and partitioning process at different annealing temperatures in two-phase region on microstructure of a low carbon Si-Mn steel was investigated by using a thermo-meehanical simulator CCT-AY-Ⅱ, XRD, SEM and TEM. The results show that the mierostructure of the low carbon Si-Mn steel consists of lath martensite, ferrite and retained austenite by Q＆P process. Film retained austenite between lath martensite and bulk retained austenite at prior-austenite grain boundaries is observed. The steel after Q＆P process possess a good combination of strength and plasticity due to its fine mierostructure. It exhibits high ultimate tensile strength exceeding 1000 MPa and fine elongation of 23%. The retained austenite with volume fraction up to 11% plays a role of transtormation-induced plasticity.
作者 蒯振 陈银莉 庄宝潼 赵爱民 姜英花
机构地区 北京科技大学冶金工程研究院 首钢技术研究院
出处 《材料热处理学报》 EI CAS CSCD 北大核心 2012年第12期88-93,共6页 Transactions of Materials and Heat Treatment
基金 国家"863"计划资助项目(2008AA03Z502)
关键词 Q&P 板条马氏体 残留奥氏体 TRIP效应 两相区退火 Q＆P lath martensite remained austenite TRIP effect annealing in two-phase region
分类号 TG162.83 [金属学及工艺—热处理]
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参考文献14

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二级参考文献7

共引文献108

同被引文献46

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引证文献7

二级引证文献12

材料热处理学报
2012年 第12期

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