| 热轧和退火后汽车用热镀锌440 MPa级高强IF钢析出物分析 |
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| 引用本文： | 陈斌锴,张启富,江社明,郝晓东.热轧和退火后汽车用热镀锌440 MPa级高强IF钢析出物分析[J].钢铁,2012,47(5):59-63. |
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| 作者姓名： | 陈斌锴 张启富 江社明 郝晓东 |
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| 作者单位： | 新冶高科技集团有限公司， 北京 100081 |
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| 基金项目： | 北京市科技计划项目，课题编号D07010300700702 |
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| 摘 要： | 通过TEM和EDS对汽车用热镀锌440MPa级高强IF钢热轧和不同退火工艺条件下的析出物的形貌、分布和成分特征进行研究，并分析了退火工艺参数对析出物的影响。结果表明，热轧和退火得到的析出物主要有TiN、NbC、TiC、Fe(Ti+Nb)P等。退火后的析出物数量都明显多于热轧板中的析出物数量，并且随着退火温度的升高和保温时间的延长，原来粗大析出物细化、分解，而原来细小析出物得以粗化、长大。
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| 关 键 词： | 热轧 退火 析出物 |
| 收稿时间： | 2011-01-24 |
Precipitation Analysis of Hot Dip Galvanizing 440 MPa High Strength IF Steel for Automotive After Hot Rolling and Annealing |
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| CHEN Bin-kai,ZHANG Qi-fu,JIANG She-ming,HAO Xiao-dong.Precipitation Analysis of Hot Dip Galvanizing 440 MPa High Strength IF Steel for Automotive After Hot Rolling and Annealing[J].Iron & Steel,2012,47(5):59-63. |
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| Authors: | CHEN Bin-kai ZHANG Qi-fu JIANG She-ming HAO Xiao-dong |
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| Affiliation: | New Metallurgy Hi-Tech Group Co., Ltd., Beijing 100081， China |
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| Abstract: | The micrographs,distribution and chemical compositions of precipitations in hot-rolling and different annealing processes were analyzed,and the influences of annealing parameters on precipitations were also studied by TEM and EDS about galvanized 440 MPa high strength IF steel for automotive.The results show that the precipitations are mainly composed of TiN,NbC,TiC and Fe(Ti+Nb)P in hot rolling and annealing.The precipitations quantity of annealed steel is more than hot rolled steel,and the original coarse precipitation are reduced and original small precipitations are growth with the increasing of annealing temperature and holding time. |
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| Keywords: | hot rolling annealing process precipitation |
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