林乙丑,张彦敏,张广威,郎庆斌,宋克兴

• 1:河南科技大学材料科学与工程学院
• 2:洛阳中重铸锻有限责任公司
• 3:河南省大型铸锻件工程技术研究中心
• 4:有色金属共性技术河南省协同创新中心

摘要(Abstract)：

在Formastor-FⅡ相变仪上,用膨胀法测定了1.25Cr0.5MoSiNb钢在不同冷速下过冷奥氏体连续冷却时的膨胀曲线;采用切线法获得了相转变点,结合硬度和金相测试,用Origin软件绘制了实验钢过冷奥氏体连续冷却相转变曲线(CCT曲线),并用实验验证了CCT曲线的准确性。结果表明:实验钢的临界点A_(c1)和A_(c3)分别为763℃和856℃;当过冷奥氏体冷速在0.05～0.3℃/s时,发生铁素体和贝氏体相变,硬度显著增加;当冷速为0.5～10℃/s时,只发生贝氏体相变,且随着冷速的增大,贝氏体形态逐渐由粒状转变为板条状,硬度缓慢增加。

关键词(KeyWords)： 1.25Cr0.5MoSiNb钢;CCT曲线;连续冷却;热处理

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2016YFB0300400);; 河南省杰出人才创新基金(182101510003);; 河南省创新型科技团队(C20150014)

作者(Author): 林乙丑,张彦敏,张广威,郎庆斌,宋克兴

DOI: 10.13289/j.issn.1009-6264.2020-0252

参考文献(References)：

• [1] 潘爱华.石化化工行业供给侧改革思路[J].产业经济评论,2016(4):124-126.PAN Ai-hua.Supply side reform ideas in petrochemical industry[J].Review of Industrial Economics,2016(4):124-126.
• [2] 席宇栋.浅谈我国石油化工发展趋势问题[J].化工设计通讯,2017,43(10):161-162.XI Yu-dong.Discussion on the influence of water conservancy construction on the environment and the countermeas[J].Chemical Engineering Design Communications,2017,43(10):161-162.
• [3] 刘安琦.京津冀石化产业效率及其影响因素研究[D].天津:天津理工大学,2018.LIU An-qi.Study on industrial efficiency and its influencing factors of Beijing-Tianjin-Hebei petrochemical industry[D].Tianjin:Tianjin University of Technology,2018.
• [4] 彭娟.带极堆焊在石化装置加氢反应器中的应用及其质量控制[D].西安:西安石油大学,2013.PENG Juan.On application and quality control of strip overlaying welding in petrochemical device-hydrogenation reactor[D].Xi’an:Xi’an Shiyou University,2013.
• [5] 庞庆海,郎庆斌,马窦琴,等.2.25Cr1Mo0.25V钢连续冷却过程的相变行为[J].金属热处理,2019,44(2):12-16.PANG Qing-hai,LANG Qing-bin,MA Dou-qin,et al.Continuous cooling transformation behavior of 2.25Cr1Mo0.25V steel[J].Heat Treatment of Metals,2019,44(2):12-16.
• [6] 王璐,孙玉福,赵靖宇,等.铌对低温钢组织及性能的影响[J].钢铁,2012,47(6):64-68.WANG Lu,SUN Yu-fu,ZHAO Jing-yu,et al.Effect of niobium on microstructure and properties of cryogenic steels[J].Iron and Steel,2012,47(6):64-68.
• [7] 曹建春,刘清友,雍岐龙,等.铌对高强度低合金钢的组织和强化机制的影响[J].钢铁,2006(8):60-63.CAO Jian-chun,LIU Qing-you,YONG Qi-long,et al.Effect of niobium on microstructure and strengthening mechanism of HSLA steel[J].Iron and Steel,2006(8):60-63.
• [8] Vervynckt S,Thibaux P,Verbeken K.Effect of niobium on the microstructure and mechanical properties of hot rolled microalloyed steels after recrystallization-controlled rolling[J].Metals and Materials International,2012,18(1):37-46.
• [9] 付俊岩.Nb微合金化和含铌钢的发展及技术进步[J].钢铁,2005,40(8):1-6.FU Jun-yan.Development history of Nb-microalloying technology and progress of Nb-microalloyed steels[J].Iron and Steel,2005,40(8):1-6.
• [10] 岳嵩.铌钒微合金化连续油管组织性能研究[D].沈阳:东北大学,2011.YUE Song.Research on microstructure and properties of Nb,V micro-alloyed the coiled tubing[D].Shenyang:Northeastern University,2011.
• [11] 李红英,王法云,曾翠婷,等.3Cr2Mo钢CCT曲线的测定与分析[J].中南大学学报(自然科学版),2011,42(7):1928-1933.LI Hong-ying,WANG Fa-yun,ZENG Cui-ting,et al.Determination and analysis of CCT curves of 3Cr2Mo steel[J].Journal of Central South University(Science and Technology),2011,42(7):1928-1933.
• [12] 李露,周旭东,陈学文,等.PCrNi3MoV钢静态CCT曲线的测定与分析[J].材料热处理学报,2020,41(1):138-142.LI Lu,ZHOU Xu-dong,CHEN Xue-wen,et al.Measurement and analysis of static CCT curve of PCrNi3MoV steel[J].Transactions of Materials and Heat Treatment,2020,41(1):138-142.
• [13] 计云萍,任慧平,刘新华,等.添加稀土的20MnCrNi2Mo耐磨铸钢静态CCT曲线的研究[J].稀土,2014,35(6):7-12.JI Yun-ping,REN Hui-ping,LIU Xin-hua,et al.Study on static CCT Curve of 20MnCrNi2Mo wear-resistant cast steel with rare earth[J].Chinese Rare Earths,2014,35(6):7-12.
• [14] 赵培林,孙新军,王振强,等.Cr对高强度集装箱用钢动态CCT曲线和组织的影响[J].材料热处理学报,2013,34(11):125-131.ZHAO Pei-lin,SUN Xin-jun,WANG Zhen-qiang,et al.Effect of Cr on dynamic CCT curves and microstructure of container steel with high strength[J].Transactions of Materials and Heat Treatment,2013,34(11):125-131.
• [15] 金光秀,高彩茹,杜林秀.含B钒微合金钢的连续冷却相变行为[J].东北大学学报(自然科学版),2015,36(6):780-785.JING Guang-xiu,GAO Cai-ru,DU Lin-xiu.Phase transformation behaviors of boron-vanadium microallyed steel during the continuous cooling[J].Journal of Northeastern University(Natural Science),2015,36(6):780-785.
• [16] 王晓峰,李红英,张尚青,等.T24钢过冷奥氏体连续冷却转变研究[J].中南大学学报(自然科学版),2014,45(11):3769-3777.WANG Xiao-feng,LI Hong-ying,ZHAMG Shang-qing,et al.Continuous cooling transformation of undercooling austenite of T24 steel[J].Journal of Central South University(Science and Technology),2014,45(11):3769-3777.
• [17] Wu Q S,Zheng S,Huang Q,et al.Continuous cooling transformation behaviors of CLAM steel[J].Journal of Nuclear Materials,2013,442(1/3):S67-S70.
• [18] 徐光.金属材料CCT曲线测定及绘制[M].北京:化学工业出版社,2009.
• [19] Podder A S,Bhadeshia H K D H.Thermal stability of austenite retained in bainitic steels[J].Materials Science and Engineering A,2010,527(7/8):2121-2128.
• [20] Krielaart G P,van der Zwaag S.Simulations of pro-eutectoid ferrite formation using a mixed control growth model[J].Materials Science and Engineering A,1998,246(1-2):104-116.
• [21] 张建,李长生,李彬周,等.20CrNi2MoV钢连续冷却过程中的相变行为[J].辽宁科技大学学报,2017,40(1):60-66.ZHANG Jian,LI Chang-sheng,LI Bin-zhou,et al.Continuous cooling transformation behavior of 20CrNi2MoV steel[J].Journal of University of Science and Technology Liaoning,2017,40(1):60-66.
• [22] Yakubtsov I A,Poruks P,Boyd J D.Microstructure and mechanical properties of bainitic low carbon high strength plate steels[J].Materials Science and Engineering A,2008,480(1/2):109-116.
• [23] 唐静.V、Nb对Mn-Mo-Ti系耐火钢CCT曲线及组织与性能的影响[J].金属热处理,2013,38(9):92-95.TANG Jing.Effects of V and Nb on CCT curves of Mn-Mo-Ti fire-resistant steel and its microstructure and proper[J].Heat Treatment of Metals,2013,38(9):92-95.
• [24] 王壮飞,唐帅,刘振宇,等.Nb对低碳微合金钢连续冷却相变行为的影响[J].东北大学学报(自然科学版),2014,35(8):1117-1119.WANG Zhuang-fei,TANG Shuai,LIU Zhen-yu,et al.Effect of Nb on continuous cooling transformation behavior of low carbon microalloyed Steel[J].Journal of Northeastern University(Natural Science),2014,35(8):1117-1119.
• [25] You Y,Shang C,Wenjin N,et al.Investigation on the microstructure and toughness of coarse grained heat affected zone in X-100 multi-phase pipeline steel with high Nb content[J].Materials Science and Engineering A,2012,558:692-701.
• [26] 刘宗昌.合金钢显微组织辨识[M].北京:高等教育出版社,2017.

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