高志国

• 1:武夷学院机电工程学院
• 2:内蒙古包钢钢联股份有限公司技术中心

摘要(Abstract)：

利用25 kg真空冶炼炉和550 mm热轧实验机组制备了一种新型1.5 GPa超高强度钢板,采用Formastor-F相变仪、光学显微镜(OM)、透射电镜(TEM)等研究了镧对1.5 GPa超高强度钢的淬透性及微观组织的影响。结果表明:当冷却速率达到10℃/s以上时,实验钢组织中出现马氏体。与不加镧的实验钢相比较,加入0.09%的镧降低了1.5 GPa超高强度钢的临界冷却速率60%以上。镧促进了实验钢马氏体的转变,显著提高了其淬透性,主要原因是镧原子偏聚抑制了奥氏体扩散型分解并促进了马氏体非扩散型切变。镧在实验钢中通过原子偏聚影响微结构,一部分镧原子向晶界偏聚,另一部分向异质形核质点偏聚。

关键词(KeyWords)： 稀土镧;冷却速率;微观组织;淬透性;超高强度钢

Abstract:

Keywords:

基金项目(Foundation): 包头市重大科技发展项目(2013Z1001)

作者(Author): 高志国

DOI: 10.13289/j.issn.1009-6264.2020-0165

参考文献(References)：

• [1] Merklein M,Lechler J.Investigation of the thermo-mechanical properties of hot stamping steels[J].Journal of Materials Processing Technology,2006,177(1/3):452-455.
• [2] Turetta A,Bruschi S,Ghiotti A.Investigation of 22MnB5 formability in hot stamping operations[J].Journal of Materials Processing Technology,2006,177(1/3):396-400.
• [3] Garcia Aranda L,Chastel Y,Fernández Pascual J,et al.Experiments and simulation of hot stamping of quenchable steels[J].Advanced Technology of Plasticity,2002(2):1135-1140.
• [4] Zhao Y S,Gao Z G,Deng Y L.Effects of cooling rate on metallographic structure of boron-bearing steel[J].Applied Mechanics and Materials,2015,778:92-95.
• [5] Naderi M,Durrenberger L,Molinari A,et al.Constitutive relationships for 22MnB5 boron steel deformed isothermally at high temperatures[J].Materials Science and Engineering A,2008,478(1):130-139.
• [6] Naderi M,Saeed-Akbari A,Bleck W.The effects of non-isothermal deformation on martensitic transformation in 22MnB5 steel[J].Materials Science and Engineering A,2008,487(1):445-455.
• [7] 梁益龙,谭起兵.稀土对Mn-RE系贝氏体钢CCT曲线及组织的影响[J].金属热处理,2009,34(8):48-51.LIANG Yi-long,TAN Qi-bing.Effect of rare earth on CCT curves and microstructure of Mn-RE bainite steel[J].Heat Treatment of Metals,2009,34(8):48-51.
• [8] 易艳良,梁益龙,龙绍檑.空冷条件下稀土对GDL-1钢连续转变的影响[J].材料热处理学报,2014,35(S2):85-89.YI Yan-liang,LIANG Yi-long,LONG Shao-lei.Effect of rare earth on dynamic transition of GDL-1 steel under air-cooling[J].Transactions of Materials and Heat Treatment,2014,35(S2):85-89.
• [9] 计云萍,任慧平,刘新华,等.稀土对20MnCrNi2Mo耐磨铸钢过冷奥氏体转变的影响及机理[J].稀有金属材料与工程,2017,46(4):133-138.JI Yun-ping,REN Hui-ping,LIU Xin-hua,et al.Effect of rare earth on super-cooled austenite transformation of 20MnCrNi2Mo wear-resistant cast steel and its mechanism[J].Rare Metal Materials and Engineering,2017,46(4):133-138.
• [10] 于彦冲,李豪,穆林,等.稀土La及冷却速度对EH36船板钢晶内铁素体形成的影响[J].金属热处理,2017,42(3):5-9.YU Yan-chong,LI Hao,MU Lin,et al.Effect of La and cooling rate on intragranular ferrite formation in EH36 shipbuilding steel[J].Heat Treatment of Metals,2017,42(3):5-9.
• [11] 王立新,李智丽,彭军,等.U76RrRE稀土钢轨连续冷却曲线和组织性能研究[J].稀土,2017,38(1):85-89.WANG Li-xin,LI Zhi-li,PENG Jun,et al.Determination of CCT curve and analysis of microstructure and properties of U76CrRE rare earth rail[J].Chinese Rare Earth,2017,38(1):85-89.
• [12] 白桦.稀土元素镧与铈在船板钢中的作用[D].北京:北京科技大学,2007.BAI Hua.Effect of lanthanum and cerium on property of shipbuilding hull steels[D].Beijing:University of Science and Technology Beijing,2007.
• [13] 李来凤,邢中枢.Ce,Nd和Y在α-Fe中的溶解度[J].金属学报,1993,29(3):40-45.LI Lai-feng,XING Zhong-shu.Solubilities of Ce,Nd and Y in α-Fe[J].Acta Metallurgica Sinica,1993,29(3):40-45.
• [14] 张玲郁,任慧平,金自力,等.冷却方式对稀土微合金高强度钢组织的影响[J].金属热处理,2016,41(11):105-108.ZHANG Yu-ling,REN Hui-ping,JIN Zi-li,et al.Effect of cooling method on microstructure of RE microalloyed high strength steel[J].Heat Treatment of Metals,2016,41(11):105-108.
• [15] 瞿伟,任慧平,金自力,等.稀土镧对低合金高强钢微观组织及冲击韧性的影响[J].稀有金属材料与工程,2018,47(7):2087-2092.QU Wei,REN Hui-ping,JIN Zi-li,et al.Effect of lanthanum on the microstructure and impact toughness of HSLA steel[J].Rare Metal Materials and Engineering,2018,47(7):2087-2092.

文章评论(Comment)：