| 低碳Mn-Si钢中粒状组织转变研究 |
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| 引用本文： | 王勇围,许峰云,徐雪霞,白秉哲.低碳Mn-Si钢中粒状组织转变研究[J].金属学报,2009,45(5). |
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| 作者姓名： | 王勇围 许峰云 徐雪霞 白秉哲 |
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| 作者单位： | 清华大学材料科学与工程系,北京,100084 |
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| 摘 要： | 对低碳Mn-Si钢中的粒状组织进行了实验研究,考察了粒状组织中小岛的形状及其分布.结果表明,不含Cr时,空冷后形成了由先共析铁素体基体+岛状物所组成的粒状组织,其中的岛状物形态及分布可以是无规则的,也可以是长条状的小岛沿一定方向分布于基体上.对于这2种形态的粒状组织,尤其是对后者形态的形成和铁素体基体的分析表明,小岛的形状和分布是先共析铁素体形态的反映,条形规则排列的小岛可能受先共析铁素体基体台阶长大机制控制,粒状组织小岛在一定条件下也可能具有方向性.加适量Cr后,连续冷却后的组织中不出现粒状组织.
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| 关 键 词： | 粒状组织 粒状贝氏体 铁素体基体 台阶机制 |
RESEARCH ON TRANSFORMATION OF GRANULAR STRUCTURE IN LOW CARBON Mn-Si STEEL |
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| WANG Yongwei,XU Fengyun,XU Xuexia,BAI Bingzhe.RESEARCH ON TRANSFORMATION OF GRANULAR STRUCTURE IN LOW CARBON Mn-Si STEEL[J].Acta Metallurgica Sinica,2009,45(5). |
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| Authors: | WANG Yongwei XU Fengyun XU Xuexia BAI Bingzhe |
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| Affiliation: | WANG Yongwei,XU Fengyun,XU Xuexia,BAI Bingzhe Deptartment of Materials Science , Engineering,Tsinghua University,Beijing 100084 |
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| Abstract: | Previous researches indicated that granular bainite(GB) and granular structure(GS) mainly differ in the shape and distribution of islands and the ferrite matrix:firstly,the GB islands distribute regularly and longitudinally in stripe shape,whereas the GS islands distribute disorderedly with irregular morphology;secondly,the matrix of the former is bainitic ferrite,however that of the latter is proeutectoid ferrite matrix.In addition,the properties of GB and GS differ significantly.Under specific conditions ... |
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| Keywords: | granular structure granular bainite ferrite matrix ledgewise mechanism |
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