刘悦,屠卡滨,吴红艳,杜林秀

• 1:东北大学轧制技术及连轧自动化国家重点实验室
• 2:舟山海关

摘要(Abstract)：

采用Formaster-FII全自动相变仪和MMS-300热模拟实验机分别对低碳V-N-Cr微合金化耐候钢未经变形及变形的奥氏体的连续冷却转变(CCT)曲线进行了测定。结果表明:与静态CCT曲线相比,低碳V-N-Cr微合金化耐候钢奥氏体变形后的动态CCT曲线的相变温度较高,曲线整体向左上方移动;变形会大幅度增加奥氏体内部缺陷密度,促进铁素体相变发生;对于变形奥氏体,当冷速小于2℃/s,相变组织为铁素体和珠光体;当冷速大于2℃/s,开始出现粒状贝氏体和针状铁素体;随着冷却速率的增大,铁素体和珠光体组织逐渐减少,贝氏体组织增多,存在粒状贝氏体和板条贝氏体,铁素体的晶粒尺寸也逐渐减小。在20～40℃/s相对大的冷却速度范围内,V-N-Cr耐候钢由板条贝氏体和针状铁素体组织组成。

关键词(KeyWords)： 耐候钢;连续冷却转变曲线;V-N-Cr微合金化;奥氏体变形

Abstract:

Keywords:

基金项目(Foundation): 国家“863”计划项目(2015AA03501)

作者(Author): 刘悦,屠卡滨,吴红艳,杜林秀

DOI: 10.13289/j.issn.1009-6264.2019-0126

参考文献(References)：

• [1] Baker T N.Processes,microstructure and properties of vanadium microalloyed steels[J].Materials Science and Technology,2009,25(9):1083-1107.
• [2] 朱茂华,王福明,文学荣,等.Nb-V微合金中碳非调质钢CCT曲线的测定与分析[J].金属热处理,2017,42(8):20-24.ZHU Mao-hua,WANG fu-ming,WEN Xue-rong,et al.Determination and analysis of CCT curve of Nb-V microalloyed medium carbon nonquencbed tempered steel[J].Heat Treatment of Metals,2017,42(8):20-24.
• [3] 王利军,李宝秀,陈继林,等.30CrMnTi钢奥氏体的连续冷却转变行为[J].金属热处理,2016,41(8):41-44.WANG Li-jun,LI Bao-xiu,CHEN Ji-lin,et al.Continuous cooling transformation behavior of undercooled austenite of 30CrMnTi steel[J].Heat Treatment of Metals,2016,41(8):41-44.
• [4] 达传李,杨庚蔚,毛新平,等.奥氏体形变对50CrV4钢相变行为的影响[J].钢铁研究学报,2017,29(5):411-419.DA Chuan-li,YANG Geng-wei,MAO Xin-ping,et al.Effect of austenite deformation on phase transformation behavior of 50CrV4 steel[J].Journal of Iron and Steel Research,2017,29(5):411-419.
• [5] 侯晓英,许云波,吴迪.含钒0.2C-0.5Si-0.08P-Mn TRIP 钢连续冷却过程中的相变行为[J].东北大学学报:自然科学版,2010,31(10):1405-1409.HOU Xiao-ying,XU Yun-bo,WU Di.Continuous cooling transformation behaviour of V-bearing 0.2C-0.5Si-0.08P-Mn trip steel[J].Journal of Northeastern University:Natural Science,2010,31(10):1405-1409.
• [6] 笪光杰,杨忠民,李立新,等.Si-Mn-Mo系低碳贝氏体钢的连续冷却转变曲线及组织特征[J].金属热处理,2019,44(2):16-24.DA Guang-jie,YANG Zhong-min,LI Li-xin,et al.Continuous cooling transformation curves and microstructure of Si-Mn-Mo low carbon bainitic steel[J].Heat Treatment of Metals,2019,44(2):16-24.
• [7] 韦凤慈,罗攀,张涛,等.热变形对高碳钢连续冷却转变的影响[J].金属热处理,2018,43(5):139-143.WEI Feng-ci,LUO Pan,ZHANG Tao,et al.Effect of thermal deformation on continuous cooling transformation of high carbon steel[J].Heat Treatment of Metals,2018,43(5):139-143.
• [8] Capdevila C,Garcia-Mateo C,Cornide J,et al.Effect of V precipitation on continuously cooled sulfur-lean vanadium-alloyed steels for long products applications[J].Metallurgical and Materials Transactions A,2011,42(12):3743-3751.
• [9] 吴红艳,沈开照,查春和,等.耐候钢形变奥氏体的连续冷却转变行为[J].机械工程材料,2007,31(5):72-75+78.WU Hong-yan,SHEN Kai-zhao,ZHA Chun-he,et al.The continuous cooling austensite transition of the weathering steel deformation[J].Materials for Mechanical Engineering,2007,31(5):72-75.
• [10] 宋凤明,温东辉,李自刚.高耐蚀钢的CCT曲线及组织演变[J].热加工工艺,2013,42(14):54-56.SONG Feng-ming,WEN Dong-hui,LI Zi-gang.Microstructure evolution and CCT curve for corrosion resistant steel[J].Hot Working Technology,2013,42(14):54-56.
• [11] 王小鹏,杜林秀,周民,等.800 MPa级冷轧耐候双相钢连续冷却相变及组织性能研究[J].材料科学与工艺,2013,21(1):67-72.WANG Xiao-peng,DU Lin-xiu,ZHOU Min,et al.Microstructure and mechanical properties of 800 MPa grade cold rolled weathering dual-phase steel and its continuous cooling phase transformation[J].Materials Science and Technology,2013,21(1):67-72.
• [12] Lanzagorta J L,Jorge-Badiola D,Gutierrez I.Effect of the strain reversal on austenite-ferrite phase transformation in a Nb-microalloyed steel[J].Materials Science and Engineering A,2010,527:934-940.
• [13] Bakkaloglu A.Effect of processing parameters on the microstructure and properties of an Nb microalloyed steel[J].Materials Letters,2002,56:200-209.
• [14] Huang Y D,Yang W Y,Sun Z Q.Formation of ultrafine grained ferritein low carbon steel by heavy deformation in ferrite or dual phase region[J].Journal of Materials Processing Technology,2003,134(1):19-25.
• [15] Capdevilla C,Garcia-Mateo C,Chao J,et al.Effects of V and N precipitation on acicular ferrite formation in sulfur-lean vanadium steels[J].Metallurgical and Materials Transactions,2009,40A:522-538.

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