| 轧后冷却工艺对海洋平台用钢组织性能的影响 |
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| 引用本文： | 狄国标,周砚磊,姜中行,刘振宇,麻庆申. 轧后冷却工艺对海洋平台用钢组织性能的影响[J]. 材料热处理学报, 2011, 32(10) |
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| 作者姓名： | 狄国标 周砚磊 姜中行 刘振宇 麻庆申 |
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| 作者单位： | 1. 首钢技术研究院,北京,100041
2. 东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳,110004 |
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| 基金项目： | 国家高科技技术发展计划(2007AA03Z504) |
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| 摘 要： | 轧后采用空冷、加速冷却和两段式（前段超快冷＋后段加速冷却,简称超快冷）三种冷却模式进行控制冷却,研究了冷却工艺对海洋平台用钢组织性能的影响。结果表明,空冷工艺所得试验钢的组织为多边形铁素体和马氏体,铁素体晶粒内位错密度较低,析出相数量较少,尺寸粗大;加速冷却所得试验钢的显微组织由多边形铁素体、针状铁素体和细小弥散的M/A岛组成,铁素体晶粒较空冷工艺明显细化,位错密度提高,析出物细小弥散;两段式所得试验钢的相变组织主要为针状铁素体,板条明显细化,位错密度进一步提高,析出物细小而数量降低。三种冷却工艺中,空冷工艺所得试验钢的屈强比最低,塑性最好;加速冷却工艺所得试验钢的低温韧性最佳;而采用两段式冷却工艺所得试验钢抗拉强度最高。
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| 关 键 词： | 低温韧性 冷却工艺 屈强比 M/A岛 |
Effect of cooling mode on microstructure and mechanical properties of offshore platform steel |
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| DI Guo-biao,ZHOU Yan-lei,JIANG Zhong-hang,LIU Zhen-yu,MA Qing-shen. Effect of cooling mode on microstructure and mechanical properties of offshore platform steel[J]. Transactions of Materials and Heat Treatment, 2011, 32(10) |
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| Authors: | DI Guo-biao ZHOU Yan-lei JIANG Zhong-hang LIU Zhen-yu MA Qing-shen |
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| Affiliation: | DI Guo-biao1,ZHOU Yan-lei2,JIANG Zhong-hang1,LIU Zhen-yu2,MA Qing-shen1(1.Shougang Research Institute of Technology,Beijing 100041,China,2.The State Key Laboratory of Rolling and Automation of Northeastern University,Shenyang 110004,China) |
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| Abstract: | In order to investigate the effect of cooling routes on microstructure and mechanical properties of offshore platform steel,three types of cooling mode which includes air cooling,accelerated cooling(ACC),and two-stage cooling(ultra fast cooling(UFC)+ ACC)was applied after hot rolling.The results show that polygonal ferrite and martensite are obtained by air cooling process.Dislocation density in polygonal ferrite is relatively lower and precipitates are larger,and sparsely distributed.The microstructure of ... |
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| Keywords: | low temperature toughness cooling mode yield ratio M/A island |
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