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| 回火保温时间对9Ni钢逆转变奥氏体和低温韧性的影响 | |
| 引用本文： | 张坤,唐荻,武会宾. 回火保温时间对9Ni钢逆转变奥氏体和低温韧性的影响[J]. 金属热处理, 2012, 37(3): 85-88 |
| 作者姓名： | 张坤 唐荻 武会宾 |
| 作者单位： | 北京科技大学高效轧制国家工程研究中心,北京,100083 |
| 基金项目： | 国家十一五科技支撑计划项目 |
| 摘 要： | 在线热处理工艺中回火时间对9Ni钢逆转变奥氏体的体积分数和低温韧性有重要影响。用OM,SEM,XRD,EBSD,CVN等方法对不同回火保温时间样品中的逆转变奥氏体含量、分布及其低温韧性进行了研究。结果表明,逆转变奥氏体的体积分数随保温时间的延长先升高后降低,30 min时最高约为4.8%;低温冲击吸收能量(-192℃)在保温60 min时最高为132 J;低温韧性与逆转变奥氏体的体积分数及分布有关。 |
| 关 键 词： | 回火保温时间 9Ni钢 逆转变奥氏体 低温韧性 |
Effect of tempering time on reversed austenite and cryogenic toughness of 9Ni steel |
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| ZHANG Kun,TANG Di,WU Huibin. Effect of tempering time on reversed austenite and cryogenic toughness of 9Ni steel[J]. Heat Treatment of Metals, 2012, 37(3): 85-88 | |
| Authors: | ZHANG Kun TANG Di WU Huibin |
| Affiliation: | (National Engineering Research Center of Advancing Rolling,University of Science and Technology Beijing,Beijing 100083,China) |
| Abstract: | Tempering time of online heat treatment has greatly influence on reversed austenite volume fraction and cryogenic toughness of 9Ni steel.Reversed austenite content,distribution and cryogenic toughness were investigated by OM,SEM,XRD,EBSD,CVN.The result show that the volume fraction of reversed austenite increased firstly and then decreased along with increasing of holding time,and reached climax at 30min,which is about 4.8%.The low temperature impact absorption energy(-192 ℃)is reached to 132 J after holding for 60 min.Cryogenic toughness is related to reversed austenite volume fraction and distribution. |
| Keywords: | tempering time 9Ni steel reversed austenite cryogenic toughness |
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