雷晓维,高万夫,冯耀荣,张建勋,王华良,武保增

• 1:中国石油大学(北京)材料科学与工程系
• 2:中国石油集团石油管工程技术研究院
• 3:西安交通大学材料科学与工程学院

摘要(Abstract)：

采用Q-P-T工艺对20SiMn2MoV钢进行热处理,利用扫描电镜、透射电镜研究其微观组织,使用XRD分析残留奥氏体的含量,并通过拉伸试验、冲击试验研究了Q-P-T工艺对钢力学性能的影响。结果表明,20SiMn2MoV钢经Q-P-T处理获得了板条马氏体+残留奥氏体+弥散析出碳化物的组织,残留奥氏体含量为4%~7%。淬火介质温度越高,残留奥氏体含量越高,钢的塑性、冲击韧性越好。碳分配时间应适中,过短则奥氏体稳定化不够,过长则发生碳化物析出及残留奥氏体分解。当淬火介质温度为90℃,碳分配60 s时,钢的抗拉强度为1344 MPa,伸长率达18.8%,强塑积为25267 MPa·%,具有优良的强塑性匹配。

关键词(KeyWords)： 淬火-分配-回火(Q-P-T)工艺;碳分配;残留奥氏体;强塑积;冲击韧性

Abstract:

Keywords:

基金项目(Foundation): 中国石化集团“高寒地区石油装备与材料研究”(JW08001)项目

作者(Author): 雷晓维,高万夫,冯耀荣,张建勋,王华良,武保增

DOI: 10.13289/j.issn.1009-6264.2013.11.026

参考文献(References)：

• [1]王六定,丁富才,王佰民,等.低合金超高强度钢亚结构超细化对韧性的影响[J].金属学报,2009,45(3):292-296.WANG Liu-ding,DING Fu-cai,WANG Bai-min,et al.Influence of super-fine substructure on toughness of low-alloying ultra-high strength structure steel[J].Acta Metallurgica Sinica,2009,45(3):292-296.
• [2]戎咏华.先进超高强度-高塑性Q-P-T钢[J].金属学报,2011,47(12):1483-1489.RONG Yong-hua.Advanced Q-P-T steels with ultrahigh strength-high ductility[J].Acta Metallurgica Sinica,2011,47(12):1483-1489.
• [3]Speer J G,Matlock D K.Developments in the quenching and partitioning process[J].World Iron&Steel,2009(1):31-39.
• [4]高宽,王六定,朱明,等.低合金超高强度贝氏体钢的晶粒细化与韧性提高[J].金属学报,2007,43(3):315-320.GAO Kuan,WANG Liu-ding,ZHU Ming,et al.Refinement of grain and enhancement of impact toughness for low-alloying ultra-high strength bainite steels[J].Acta Metallurgica Sinica,2007,43(3):315-320.
• [5]Edmonds D V,He K,Rizzo F C,et al.Quenching and partitioning martensite-a novel steel heat treatment[J].Materials Science and Engineering A,2006,438:25-34.
• [6]定巍,江海涛,唐荻,等.TRIP钢塑性变形时加工硬化行为研究[J].热加工工艺,2009,38(20):15-17.DING Wei,JIANG Hai-tao,TANG Di,et al.Study on working-hardening behavior of trip-assisted steels during plastic deformation[J].Hot Working Technology,2009,38(20):15-17.
• [7]Speer J G,Matlock D K,De Cooman B C,et al.Carbon partitioning into austenite after martensite transformation[J].Acta Materialia,2003,51(9):2611-2622.
• [8]Hillert M,Agren J.On the definitions of paraequilibrium and orthoequilibrium[J].Scripta Materialia,2004,50(5):697-699.
• [9]Zhong N,Wang X D,Rong Y H,et al.Interface migration between martensite and austenite during quenching and partitioning(Q&P)process[J].Journal of Materials Science and Technology,2006,22(6):751-754.
• [10]庄宝潼,唐荻,江海涛,等.Q&P工艺对0.3C-1.35Mn-1.30Si钢力学性能的影响[J].材料热处理学报,2011,32(11):34-39.ZHUANG Bao-tong,TANG Di,JIANG Hai-tao,et al.Influence of quenching and partitioning process on mechanical properties of a 0.3C-1.35Mn-1.30Si steel[J].Transactions of Materials and Heat Treatment,2011,32(11):34-39.
• [11]徐祖耀.钢热处理的新工艺[J].热处理,2007,22(1):1-11.XU Zu-yao.New processes for steel heat treatment[J].Heat Treatment,2007,22(1):1-11.
• [12]徐祖耀.用于超高强度钢的淬火-碳分配-回火(沉淀)(Q-P-T)工艺[J].热处理,2008,23(2):1-5.XU Zu-yao.Quenching-partitioning-tempering(precipitation)(Q-P-T)process for ultra-high strength steel[J].Heat Treatment,2008,23(2):1-5.
• [13]胡浙梁,王晓东,王利,等.新型Q-P-T钢性能及其微观组织[J].材料热处理学报,2010,31(4):76-80.HU Zhe-liang,WANG Xiao-dong,WANG Li,et al.Property and microstructure of a novel Q-P-T steel[J].Transactions of Materials and Heat Treatment,2010,31(4):76-80.
• [14]高万夫,雷晓维,石铁.亚温淬火对20SiMn2MoV钢低温韧度的影响[J].石油机械,2011,39(9):1-4.GAO Wan-fu,LEI Xiao-wei,SHI Tie.The effect of subcritical quenching on the low-temperature toughness of the 20SiMn2MoV steel[J].China Petroleum Machinery,2011,39(9):1-4.
• [15]石铁,高万夫,雷晓维.“零保温”淬火对20SiMn2MoV钢冲击性能的影响[J].热加工工艺,2011,40(22):198-200.SHI Tie,GAO Wan-fu,LEI Xiao-wei.Effect of“zero time holding”quenching on impact property of 20SiMn2MoV steel[J].Hot Working Technology,2011,40(22):198-200.
• [16]尹永晶,朱跃峰,赵旭平,等.20SiMn2MoV合金结构钢的低温冲击性能[J].金属热处理,2006,31(4):12-15.YIN Yong-jing,ZHU Yue-feng,ZHAO Xu-ping,et al.Impact property of 20SiMn2MoV steel at low temperature[J].Heat Treatment of Metals,2006,31(4):12-15.
• [17]王富耻.材料现代分析测试方法[M].北京:北京理工大学出版社,2006.
• [18]GB/T 229,金属夏比缺口冲击试验方法[S].1994.
• [19]钟宁.高强度Q&P钢和Q-P-T钢的研究[D].上海交通大学,2009.
• [20]Koistinen D P,Marburger R E.A general equation prescribing the extent of the austenite martensite transformation in pure iron-carbon alloys and plain carbon steels[J].Acta Metallurgica,1959,7(1):59-60.
• [21]赵晖.Q&P处理工艺对中锰钢组织结构及相关力学行为的研究[D].昆明理工大学,2011.
• [22]Zhou S,Zhang K,Wang Y,et al.High strength-elongation product of Nb-microalloyed low-carbon steel by a novel quenching-partitioning-tempering process[J].Materials Science and Engineering A,2011,528:8006-8012.
• [23]徐祖耀.马氏体相变与马氏体(第2版)[M].北京:科学出版社,1999.
• [24]Wang Y,Zhang K,Guo Z H,et al.A new effect of retained austenite on ductility enhancement in high strength bainitic steel[J].Materials Science and Engineering A,2012,552:288-294.
• [25]赵才,江海涛,唐荻,等.Q&P钢塑性变形机制及组织-性能研究[J].材料工程,2009(2):19-23.ZHAO Cai,JIANG Hai-tao,TANG Di,et al.Research on deformation mechanism and relationship between microstructure and properties of quenching and partitioning steel[J].Journal of Materials Engineering,2009(2):19-23.
• [26]王存宇,时捷,曹文全,等.Q&P工艺处理钢的单轴拉伸性能研究[J].材料热处理学报,2010,31(6):77-83.WANG Cun-yu,SHI Jie,CAO Wen-quan,et al.Study on uniaxial tension properties of steel treated by Q&P process[J].Transactions of Materials and Heat Treatment,2010,31(6):77-83.
• [27]Guo Z,Lee C S,Morris Jr J W.On coherent transformations in steel[J].Acta Materialia,2004,52(19):5511-5518.

文章评论(Comment)：