| 热处理对针状铁素体管线钢强度级别升级的影响 |
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| 引用本文： | 赵颖超,邓运来,黄明初,赵明纯.热处理对针状铁素体管线钢强度级别升级的影响[J].热加工工艺,2009,38(24). |
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| 作者姓名： | 赵颖超 邓运来 黄明初 赵明纯 |
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| 作者单位： | 中南大学,材料科学与工程学院,湖南,长沙,410083 |
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| 基金项目： | 国家973重大基础研究资助项目，国家教育部留学回国人员科研启动基金资助项目 |
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| 摘 要： | 通过光学显微镜、透射电镜、扫描电镜、拉伸与冲击试验,研究了热处理对针状铁素体管线钢强度级别升级的影响规律.结果表明,在对反映沉淀析出强化效果的热处理参数的分析和研究的基础上,引入一种非淬火时效工艺,即在低于奥氏体化温度的某一温度进行等温时效,可以大幅度提高针状铁素体管线钢的强度级别.这种非淬火时效促进了微合金碳氮化物在铁素体区进一步沉淀析出.非淬火时效对针状铁素体管线钢强化是行之有效的,为针状铁素体管线钢的强度级别升级提供了新的途径.
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| 关 键 词： | 管线钢 针状铁素体 热处理 强化 |
Effect of Heat Treatment on Strengthening Level of Acicular Ferrite Pipeline Steel |
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| ZHAO Yingchao,DENG Yunlai,HUANG Mingchu,ZHAO Mingchun.Effect of Heat Treatment on Strengthening Level of Acicular Ferrite Pipeline Steel[J].Hot Working Technology,2009,38(24). |
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| Authors: | ZHAO Yingchao DENG Yunlai HUANG Mingchu ZHAO Mingchun |
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| Abstract: | The effects of heat treatment on strengthening level of acicular ferrite pipeline steel were investigated by OM, TEM, SEM, tensile test and impact test. The results show that: A non-quenched aging process is applied to improve the strength level of a commercial acicular ferrite pipeline steel by analyzing the Larsen-Miller parameter describing the combined effects of the annealing temperature and time, which still remains the substantial acicular ferrite microstructure. This non-quenched aging promotes the further precipitation of the carbonitride dispersion of acicular ferrite microstructure. The strengthening obtained by non-quenched aging for acicular ferrite pipeline steels provides a lower economical cost approach for developing the high strength level of pipeline steels. |
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| Keywords: | pipeline steel acicular ferrite heat treatment strengthening |
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