| 0.02%Nb空冷仿晶界型铁素体/粒状贝氏体复相钢的相变及强韧性 |
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| 引用本文： | 冯春,方鸿生,白秉哲,郑燕康.0.02%Nb空冷仿晶界型铁素体/粒状贝氏体复相钢的相变及强韧性[J].金属学报,2010(4). |
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| 作者姓名： | 冯春 方鸿生 白秉哲 郑燕康 |
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| 作者单位： | 清华大学材料科学与工程系先进材料教育部重点实验室; |
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| 基金项目： | 国家重点基础研究发展计划资助项目2004CB619105~~ |
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| 摘 要： | 采用Gleeble-1500D热模拟机进行热模拟实验和轧制实验,研究了添加0.02%Nb对仿晶界型铁素体(F_(GBA))/粒状贝氏体(B_G)复相空冷钢相变及力学性能的影响.结果表明,0.02%Nb使该钢的连续冷却转变曲线右移,淬透性增加;0.02%Nb抑制了γ→α相变,细化了仿晶界铁素体,促进了粒状贝氏体转变,细化了粒状贝氏体及其内部的铁素体片条及马氏体-奥氏体(M-A)岛.与不含Nb的F_(GBA)/B_G复相钢相比,由于组织细化及强化相体积分数的提高,含0.02%Nb的复相钢经轧后空冷后抗拉强度上升了157 MPa,屈服强度增加了93 MPa,强化效果显著.分析了添加0.02%Nb使复相钢的组织细化及强化相体积分数增加的原因.
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| 关 键 词： | 粒状贝氏体 相变 强韧性 微量Nb 空冷 |
PHASE TRANSFORMATION AND STRENGTH-TOUGHNESS OF A F_(GBA)/B_G DIPHASE STEEL CONTAINING 0.02%Nb |
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| FENG Chun,FANG Hongsheng,BAI Bingzhe,ZHENG Yankang Key Laboratory of Advanced Materials of Ministry of Education.PHASE TRANSFORMATION AND STRENGTH-TOUGHNESS OF A F_(GBA)/B_G DIPHASE STEEL CONTAINING 0.02%Nb[J].Acta Metallurgica Sinica,2010(4). |
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| Authors: | FENG Chun FANG Hongsheng BAI Bingzhe ZHENG Yankang Key Laboratory of Advanced Materials of Ministry of Education |
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| Affiliation: | FENG Chun,FANG Hongsheng,BAI Bingzhe,ZHENG Yankang Key Laboratory of Advanced Materials of Ministry of Education,Department of Material Science , Engineering,Tsinghua University,Beijing 100084 |
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| Abstract: | In order to produce Mn-series low carbon steels using alloying elements with low cost and following the conventional production line without controlled cooling facilities and not needing special heat-treatment,Mn-series low carbon air cooling grain boundary allotriomorphic ferrite (F_(GBA))/granular bainite(B_G) steels,alloying with Si-Mn-Cr,have been developed.The effect of 0.02%Nb on the phase transformation and strength-toughness of a F_(GBA)/B_G steel have been investigated by using Gleeble-1500D machin... |
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| Keywords: | granular bainite phase transformation mechanical properties small addition of Nb air cooling |
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