| 热处理工艺对高强度船板钢组织和性能的影响 |
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| 引用本文： | 彭晟,张恒华,吴锦炎,邵光杰,许洛萍.热处理工艺对高强度船板钢组织和性能的影响[J].热处理,2008,23(2):23-26. |
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| 作者姓名： | 彭晟 张恒华 吴锦炎 邵光杰 许洛萍 |
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| 作者单位： | 上海大学材料科学与工程学院,上海,200072 |
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| 摘 要： | 采用用光学显微镜、透射电镜和力学性能测试设备研究了热处理工艺对DH40钢的组织和性能的影响。试验结果表明，随着正火或淬火加热温度的提高，钢的晶粒逐渐粗光，微合金元素的固溶度增加，因此钢的强度不断升高，断后伸长率逐步下降。采用H-800透射电镜对第二相析出的进一步分析表明，钢中析出相一般弥散分布于晶界和位错上，主要起钉扎位错和析出强化的作用。
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| 关 键 词： | 高强度船板钢 热处理工艺 析出强化 |
| 文章编号： | 1008-1690(2008)02-0023-004 |
| 修稿时间： | 2007年10月9日 |
Effect of Heat Treatment on the Microstructure and Mechanical Property of High Strength Marine Steel |
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| PENG Sheng,ZHANG Heng-hua,WU Jin-yan,SHAO Guang-jie,XU Luo-ping.Effect of Heat Treatment on the Microstructure and Mechanical Property of High Strength Marine Steel[J].Heat Treatment,2008,23(2):23-26. |
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| Authors: | PENG Sheng ZHANG Heng-hua WU Jin-yan SHAO Guang-jie XU Luo-ping |
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| Affiliation: | (College of Materials Science and Engineering, Shanghai University, Shanghai 200072) |
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| Abstract: | The effect of heat treatment process on the microstructure and mechanical properties of DH40 steel was studied by using metallographic microscope, transmission electron microscope and universal testing machine. The experimental results showed that the grains of steel would gradually coarsen and the solid solubility of microalloying elements would increase with the elevation of normalizing or quenching temperature, as a result, higher strength and lower elongation of the steel could be obtained. Further study on precipitation of second phase in the steel revealed that the precipitated phase would disperse over grain boundary, and dislocation, and play the role of anchoring dislocation and precipitation strengthening. |
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| Keywords: | high strength marine steel heat treatment process precipitation strengthening |
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