| 变形Nb-Mo钢中碳氮化物在奥氏体中的析出 |
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| 引用本文： | 赵冬伟,曹建春,周晓龙,米永峰,雍岐龙,邓蕾.变形Nb-Mo钢中碳氮化物在奥氏体中的析出[J].材料热处理学报,2012,33(5):91-94. |
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| 作者姓名： | 赵冬伟 曹建春 周晓龙 米永峰 雍岐龙 邓蕾 |
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| 作者单位： | 1. 昆明理工大学材料科学与工程学院,云南昆明,650093
2. 钢铁研究总院结构材料研究所,北京,100081 |
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| 基金项目： | 云南省应用基础研究计划项目 |
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| 摘 要： | 采用应力松弛法研究了变形量对含Nb-Mo钢中碳氮化物析出开始时间Ps的影响。结果表明:变形量越大,Ps越小;变形量为10%和15%时,最快析出温度均在875℃左右;Ps分别为6.6 s和6.2 s。预应变较小时Ps对温度变化比较敏感。通过扫描电镜(SEM)、能谱仪(EDS)和透射电镜(TEM)对不同温度下的析出相进行了分析。结果表明:变形奥氏体中的碳氮化物主要沿晶界和位错析出,温度较低时有少量在晶内析出。
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| 关 键 词： | 含Nb-Mo钢 变形量 微合金碳氮化物 奥氏体 |
Carbonitride precipitation in austenite of a deformed Nb-Mo microalloyed steel |
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| ZHAO Dong-wei,CAO Jian-chun,ZHOU Xiao-long,MI Yong-feng,YONG Qi-long,DENG Lei.Carbonitride precipitation in austenite of a deformed Nb-Mo microalloyed steel[J].Transactions of Materials and Heat Treatment,2012,33(5):91-94. |
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| Authors: | ZHAO Dong-wei CAO Jian-chun ZHOU Xiao-long MI Yong-feng YONG Qi-long DENG Lei |
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| Affiliation: | 1(1.School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093, China;2.Insitute of Structural Material,Central Iron and Steel Research Institute,Beijing 100081,China) |
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| Abstract: | With stress relaxation method,the influence of deformation on precipitation start time(Ps) of carbonitride in Nb-Mo micro-alloyed steel was investigated.The results indicate that the Ps decreases with the increasing of deformation.At 875 ℃,the fastest precipitation temperature,Ps is 6.6 s and 6.2 s,when the deformation is 10% and 15%,respectively.With smaller deformation,Ps is sensitive to temperature.Morphology,composition and locations of precipitates were analyzed by SEM,EDS and TEM.It is found that precipitates mainly form along grain boundaries and dislocations and a few of precipitation is observed in deformed austenite at lower temperature. |
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| Keywords: | steel containing Nb-Mo deformation carbonitride austenite |
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