| SAE8620H钢奥氏体连续冷却转变曲线 |
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| 引用本文： | 王伊敏,尹嘉明,郝丽萍,袁慧萍,孙鹏,侯彩云.SAE8620H钢奥氏体连续冷却转变曲线[J].兵器材料科学与工程,2010,33(3):85-87. |
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| 作者姓名： | 王伊敏 尹嘉明 郝丽萍 袁慧萍 孙鹏 侯彩云 |
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| 作者单位： | 中国兵器科学研究院,宁波分院,浙江,宁波,315103;北京工业大学,材料科学与工程学院,北京,100124 |
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| 摘 要： | 采用Formastor-digital全自动相变测量仪,测定SAE8620H钢的临界点Ac1,Ac3,Ar3,Ar1以及不同冷却速度下连续冷却时的膨胀曲线,研究冷却速度对组织及硬度的影响。结果表明:当冷却速度为50℃/h,转变产物为先共析铁素体、珠光体和少量的3次渗碳体;当冷速为3 200℃/h时,转变产物为先共析铁素体、珠光体组织和贝氏体组织;冷速为120~600℃/min时,转变产物基本上是贝氏体组织;临界淬火冷却速度大于60℃/s可得到完全马氏体组织。
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| 关 键 词： | SAE8620H钢 热膨胀法 过冷奥氏体 CCT曲线 |
Austenite continuous cooling transformation curve of SAE8620H steel |
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| WANG Yimin,YIN Jiaming,HAO Liping,YUAN Huiping,SUN Peng,HOU Caiyun.Austenite continuous cooling transformation curve of SAE8620H steel[J].Ordnance Material Science and Engineering,2010,33(3):85-87. |
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| Authors: | WANG Yimin YIN Jiaming HAO Liping YUAN Huiping SUN Peng HOU Caiyun |
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| Affiliation: | WANG Yimin1,YIN Jiaming2,HAO Liping1,YUAN Huiping2,SUN Peng1,HOU Caiyun1(1.Ningbo Branch of China Academy of Ordnance Science,Ningbo 315103,China,2.College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China) |
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| Abstract: | By Formastor-digital automatic phase transformation instrument,the critical point Ac1,Ac3,Ar3 and Ar1 of SAE8620H steel were determined.By measuring,the different CCT diagram was obtained.The influence of cooling rate on steel microstructure and hardness was studied.The results show that when the cooling rate is 50 ℃/h,the products of austenite transformation will be ferrite,pearlite and cementite;when the cooling rate is 3 200 ℃/h,the products will be ferrite,pearlite and bainite;when the cooling rate is in the range of 120-600 ℃/min,the products will be bainite and totally martensite if the cooling rate is higher than 60 ℃/s. |
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| Keywords: | SAE8620H steel thermal dilation method undercooling austenite continuous cooling transformation curve |
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