| 引用本文: | 乔志霞,刘永长,严泽生,付继成,王惠斌.30CrNi3MoV低合金超高强钢中的马氏体相变[J].材料科学与工艺,2012,20(5):138-142.DOI:10.11951/j.issn.1005-0299.20120527. |
| QIAO Zhi-xia,LIU Yong-chang,YAN Ze-sheng,FU Ji-cheng,WANG Hui-bin.Martensitic transformation in the 30CrNi3MoV low-alloy ultra-high strength steel[J].Materials Science and Technology,2012,20(5):138-142.DOI:10.11951/j.issn.1005-0299.20120527. |
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| 30CrNi3MoV低合金超高强钢中的马氏体相变 |
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乔志霞1,2, 刘永长2, 严泽生3, 付继成3, 王惠斌3
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1.天津商业大学 机械工程学院,天津 300134;2.天津大学 材料科学与工程学院,天津 300072;3.天津钢管集团股份有限公司,天津 300301
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| 摘要: |
| 通过对马氏体的显微组织进行分析,并结合线膨胀试验得到的相变动力学信息研究了30CrNi3MoV低合金超高强钢中的马氏体相变特征.结果表明:淬火冷却30CrNi3MoV钢的相变产物包括低碳板条状和高碳针状两种马氏体形态,两者的形成在动力学曲线中截然分开.板条马氏体形成于Ms以下的较高温(310℃～260℃),相变过程中发生了碳的重新分配,造成富碳奥氏体微区的形成；高碳针状马氏体形成于Ms以下的较低温(260℃～170℃),由富碳奥氏体微区转变而成.板条马氏体形成速率远高于针状马氏体. |
| 关键词: 低合金超高强钢 马氏体 相变速率 Ms |
| DOI：10.11951/j.issn.1005-0299.20120527 |
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| 基金项目:国家自然科学基金(51204121)；国家自然科学基金钢铁联合基金(50834011);中国博士后科学基金(20110490774). |
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| Martensitic transformation in the 30CrNi3MoV low-alloy ultra-high strength steel |
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QIAO Zhi-xia1,2, LIU Yong-chang2, YAN Ze-sheng3, FU Ji-cheng3, WANG Hui-bin3
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1.School of Mechanical Engineering,Tianjin University of Commerce,Tianjin 300134,China;2.School of Materials Science & Engineering,Tianjin University,Tianjin 300072,China;3.Tianjin Pipe Group Corp Ltd,Tianjin 300301,China
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| Abstract: |
| Martensitic phase transformation characteristics in the 30CrNi3MoV low-alloy ultra-high strength steel were investigated by means of microstructure observation and dilatometric measurements.The results showed that the transformation products in the quenched 30CrNi3MoV steel were two kinds of martensite with different morphologies,lath martensite and acicular martensite,formation of which clearly separate each other in transformation dynamics curves.Lath martensites form in the relatively high temperature range (310℃～260℃) below the Ms,during which diffusion of carbon atoms occurred and resulted into carbon-rich austenite micro regions around martensite lath bunches.Acicular martensites form in the relatively low temperature range (260℃～170℃) below the Ms,which are transformed from the carbon-rich austenite micro regions retained after the formation of lath martensites.Transformation rate of the lath martensite is obviously higher than that of the acicular martensite. |
| Key words: low-alloy ultra-high strength steel martensite transformation rate Ms temperature |
