| 引用本文: | 向嵩,刘国权.Nb-V-Ti低碳微合金钢的热变形加工图及其应用[J].材料科学与工艺,2011,19(1):26-31.DOI:10.11951/j.issn.1005-0299.20110106. |
| XIANG Song,LIU Guo-quan.Processing map and its application of Nb-V-Ti low carbon microalloyed steel[J].Materials Science and Technology,2011,19(1):26-31.DOI:10.11951/j.issn.1005-0299.20110106. |
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| 摘要: |
| 为了优化Nb-V-Ti低碳微合金钢的变形工艺参数,利用Gleeble-1500热/力模拟实验机对其进行了热压缩实验,得到热加工图用于研究热变形行为.研究发现,加工图中存在两个动态再结晶峰区及失稳区:峰区Ⅰ:峰值对应的变形温度和变形速率分别为1000℃,2 s-1,峰值效率21%;峰区Ⅱ:变形温度1050℃,变形速率0.01～0.001 s-1,峰值效率45%.将加工图与CSP生产工艺参数进行对比,合理解释了CSP生产过程中出现混晶的现象.因此,动态材料模型加工图可作为研究新材料变形参数的有力工具. |
| 关键词: 低碳微合金钢 加工图 薄板坯连铸连轧 热变形 动态再结晶 |
| DOI：10.11951/j.issn.1005-0299.20110106 |
| 分类号:TG142.33 |
| 基金项目:国家自然科学基金资助项目(50901022);贵州省优秀科技教育人才省长基金资助项目(200815) |
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| Processing map and its application of Nb-V-Ti low carbon microalloyed steel |
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XIANG Song1,2, LIU Guo-quan3
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1.School of Materials and Metallurgy,Guizhou University,Guiyang 550003,China;2.The Key Laboratory for Mechanical Behavior and Microstructure of Materials,Guizhou Province,Guiyang 550003,China;3.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China
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| Abstract: |
| To optimize deformation parameters,the hot deformation behavior of Nb-V-Ti microalloyed steel was studied by hot compressing tests on a Gleeble-1500 stimulator.The processing map of the steel was developed on the basis of the principle of Dynamic Material Modeling(DMM).The results exhibit that there are two peaks in the processing map: one is at the temperature of 1000 ℃ and strain rate of 2 s-1,and another is at 1050 ℃ and 0.01~0.001 s-1,and the peak efficiency of power dissipation of the two peaks is 21% and 45% respectively.The optical microstructure observations show that they represent two dynamic recrystallization domains.Compared with the parameters of compact strip product process,the phenomena of mixed grain in the microalloyed steel produced by CSP line can be explained by the map reasonably.The processing map is a useful tool in developing a new steel and optimizing hot deformation parameters. |
| Key words: low carbon microalloyed steel processing map compact strip production hot deformation dynamic recrystallization |
