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金属学报  2010 

基于过冷奥氏体动态相变的热轧TRIP钢组织控制?I.原始奥氏体晶粒尺寸

DOI: 10.3724/SP.J.1037.2009.00431, PP. 155-160

Keywords: 热轧TRIP钢,过冷奥氏体动态相变,原始奥氏体晶粒尺寸,显微组织,力学性能

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Abstract:

通过热模拟压缩实验,研究了铁素体相变前的奥氏体晶粒尺寸对基于动态相变的热轧C-Mn-Al-Si系TRIP钢组织及力学性能的影响.结果表明,减小原始奥氏体晶粒尺寸,可促进动态相变时的铁素体相变动力学,有利于铁素体、贝氏体及残余奥氏体等相分布更为均匀,获得的贝氏体束及贝氏铁素体尺寸较小,残余奥氏体的体积分数及C含量均较高,细小的颗粒状残余奥氏体数量较多且弥散分布,因此可获得具有较高强度和优良塑性的热轧TRIP钢.

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