| 冷却速率对Q690D高强钢低温冲击韧性的影响 |
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| 引用本文： | 周平,杨建勋,李艳,刘菲.冷却速率对Q690D高强钢低温冲击韧性的影响[J].轧钢,2011,28(6):18-20. |
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| 作者姓名： | 周平 杨建勋 李艳 刘菲 |
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| 作者单位： | 1. 莱芜钢铁集团有限公司,技术中心,山东 莱芜 271104
2. 莱芜钢铁集团有限公司,销售中心,山东 莱芜 271104 |
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| 摘 要： | 针对部分高强工程机械用钢Q690D冲击韧性较低的问题,分析了该钢种的强韧化机制,研究了冷却速率对其组织及冲击韧性的影响.结果表明,钢板以12、14℃/s冷速连续冷却时,形成准多边形铁素体、针状铁素体和板条状贝氏体组织,M/A岛呈微细化、等轴状弥散分布于基体中,钢板的低温冲击韧性较高.
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| 关 键 词： | 高强工程机械用钢 冷却速率 贝氏体 冲击功 韧脆转变 |
Influence of Cooling Rate on Low Temperature Toughness of High Strength Steel Q690D |
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| ZHOU Ping
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YANG Jian-xun
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LI Yan
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LIU Fei.Influence of Cooling Rate on Low Temperature Toughness of High Strength Steel Q690D[J].Steel Rolling,2011,28(6):18-20. |
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| Authors: | ZHOU Ping YANG Jian-xun LI Yan LIU Fei |
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| Affiliation: | (a. Technical Center b. Sales Center, Laiwu Iron Steel Group Co. , Ltd. ,Laiwu 271104,China) |
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| Abstract: | To the problem of lower absorbed-in-fracture energy of Q690D high strength engineering machinery steel, its strengthening/toughening mechanism was analyzed. The influence of cooling rate on microstructure and absorbed in-fracture energy was researched. The results shpw that the steel microstructures conclude qua- si-polygonal ferrite, acicular ferrite and lath bainite when the cooling rate are 12℃/s and 14℃/s. The minia ture and equiaxed M/A islands are dispersed in the matrix so that the absorbed-in-fracture energy of the steel is well. |
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| Keywords: | high strength engineering machinery steel cooling rate bainite absorbed-in-fracture energy ductile-brittle transition |
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