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控轧控冷对船舶用钢组织与性能的影响
Influence of Controlled Rolling and Cooling on Microstructure and Mechanical Properties of Marine Steel
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- DOI:
- 作者:
- 李振华 王灏旭 李壮 蔡一钦 苗博闻 宋殿福 张利 李艳梅
LI Zhenhua;WANG Haoxu;LI Zhuang;CAI Yiqin;MIAO Bowen;SONG Dianfu;ZHANG Li;LI Yanme
- 作者单位:
- 沈阳航空航天大学材料科学与工程学院 东北大学轧制技术及连轧自动化国家重点实验室
School of Materials Science and Engineering,Shenyang Aerospace University,Shenyang 110136,China;State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110819,China
- 关键词:
- 船舶用钢 控轧控冷 显微组织 力学性能
ship steel controlled rolling and cooling microstructure mechanical properties
- 摘要:
- 对比研究了两种成分控轧控冷船舶用钢的组织与性能。结果表明,2种钢控轧控冷后,组织均为贝氏体、针状铁素体、多边形铁素体及少量珠光体。控轧控冷引起的细小M-A岛复合强化、铁素体细晶强化作用提高了实验钢的强度、硬度及低温冲击韧性。2种实验钢在0°轧制方向上的冲击吸收功最大,分别达到了238.74 J和274.68 J,而在90°轧制方向上的冲击功最小,B钢高于A钢。镍量的增多能够提高实验钢的硬度、强度、塑性及低温冲击韧性。
The microstructure and properties of two kinds of steel for ship controlled rolling and cooling were studied.The results show that the structures of the two steels are bainite,acicular ferrite,polygonal ferrite and a small amount of pearlite after controlled rolling and cooling.The tensile strength,hardness and low temperature impact toughness of the experimental steel are improved by the combination strengthening of small M-A island and ferrite fine grain.The impact energy of the two experimental steels in the 0°rolling direction is the largest,reaching 238.74 J and 274.68 J,respectively,while the impact energy in the 90°rolling direction is the smallest,and steel B is higher than steel A.The increase of nickel content can improve the hardness,strength,plasticity and low temperature impact toughness of the experimental steel.