铌微合金化抗震钢筋形变奥氏体连续冷却转变

doi:10.13228/j.boyuan.issn0449-749x.20190087

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (14031 KB) HTML (0 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to study the effect of niobium on the microstructure transformation of high strength anti-seismic rebar,the microstructure and phase transformation of deformed austenite in Nb-free carbon steel bars and niobium microalloyed steel bars (0.03% niobium) at different cooling rates were studied by thermal simulator and dynamic continuous cooling curves,CCT of the tested steel were obtained. The results show that the addition of 0.03% Nb causes a significant change in the continuous cooling transformation of austenite in tested steels. It can be seen from CCT that after the addition of Nb,the cooling rate range of ferrite and pearlite phase transformation decreases,the ferrite and pearlite transformation temperature decreases. Cooling rate interval for the bainite transformation is shifted to the right as a whole. The addition of Nb can refine the microstructure,and the hardness of the niobium containing steel is greater than that of the Nb-free steel. The TEM was used to observe the precipitates in the niobium containing steel at different cooling rates. It was found that Nb(C,N) was dispersed in the steel. With the increase of cooling rate,the precipitation of Nb(C,N) gradually decreased,and the size of the precipitated phase decrease first and then increase. Size of precipitates obtained is finer and the number of precipitates is larger at cooling rate of 2 ℃/s.

Key words： niobium microalloyed steel CCT curve precipitation phase cooling rate

Received: 04 March 2019

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	CAO Jian-chun
	YE Ya-ping
	YIN Shu-biao
	ZHANG Wei-qiang
	CHEN Wei
	ZHANG Yong-qing

Cite this article:

CAO Jian-chun,YE Ya-ping,YIN Shu-biao等. Deformed austenite continuous cooling transformation in Nb microalloyed anti-seismic rebar[J]. Iron and Steel, 2019, 54(12): 81-88.

URL:

http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190087 OR http://www.chinamet.cn/Jweb_gt/EN/Y2019/V54/I12/81

[1]	雍岐龙,马鸣图,吴宝榕. 微合金钢——物理和力学冶金[M]. 北京:机械工业出版社,1989.(YONG Qi-long,MA Ming-tu,WU Bao-rong. Micro-Alloyed Steels-Physical Mechanical Metallurgy[M]. Beijing:China Machine Press,1989.)
[2]	付俊岩,王伟哲. 铌科学与技术[M]. 北京:冶金工业出版社,2003.(FU Jun-yan,WANG Wei-zhe. Niobium Science and Technology[M]. Beijing:Metallurgical Industry Press,2003.)
[3]	李晓林,肖宝亮,崔阳,等. Nb、Ti微合金钢中碳氮化物固溶与再析出的研究[J]. 材料导报,2017,31(2):105. (LI Xiao-lin,XIAO Bao-liang,CUI Yang,et al. Solid solution and re-precipitation of carbonitride in Nb,Ti-microalloyed steel[J]. Materials Review,2017,31(2):105.)
[4]	张正延,李昭东,雍岐龙,等. 升温过程中Nb和Nb-Mo微合金化钢中碳化物的析出行为研究[J]. 金属学报,2015,51(3):316.(ZHANG Zheng-yan,LI Zhao-dong,YONG Qi-long,et al. Precipitaion behavior of carbide during heating process in Nb and Nb-Mo micro-alloyed steels[J]. Acta Metallurgica Sinica,2015,51(3):316.)
[5]	聂文金,尚成嘉,吴圣杰,等. Nb对奥氏体热变形后等温回复的影响[J]. 金属学报,2012,48(7):775.(NIE Wen-jin,SHANG Cheng-jia,WU Sheng-jie,et al. Effects of Nb on recovery of hot-deformed austenite[J]. Acta Metallurgica Sinica,2012,48(7):775.)
[8]	Kestenbach H J,Campos S S,Morales E V. Role of interphase precipitation in microalloyed hot strip steels[J]. Materials Science and Technology,2006,22(6):615.
[9]	付立铭,单爱党,王巍. 低碳Nb微合金钢中Nb溶质拖曳和析出相NbC钉扎对再结晶晶粒长大的影响[J]. 金属学报,2010,46(7):833.(FU Li-ming,SHAN Ai-dang,WANG Wei. Effect of Nb solute drag and NbC precipitate pinning on the recrystallization grain growth in low carbon Nb-microacloyed steel[J]. Acta Metallurgica Sinica,2010,46(7):833.)
[10]	刘雪峰,贾涛,朱本强. Nb 对奥氏体→铁素体相变动力学影响的模型[J]. 东北大学学报,2016,37(5):642.(LIU Xue-feng,JIA Tao,ZHU Ben-qiang. Modeling the effect of Nb on austenite →ferrite phase[J].Journal of Northeastern University,2016,37(5):642.)
[11]	雍岐龙. 钢铁材料中的第二相[M]. 北京:冶金工业出版社,2006.(YONG Qi-long. Secondary Phase in Steel[M]. Beijing:Metallurgical Industry Press,2006.)
[12]	徐洲,赵连城. 金属固态相变原理[M]. 北京:科学出版社,2004.(XU Zhou,ZHAO Lian-cheng. Metal Solid Phase Transition Principle[M]. Beijing:Science Press,2004.)
[6]	LIU Q Y,SUN X J,JIA S J,et al. Austenitization behaviors of X80 pipeline steel with high Nb and trace Ti treatment[J]. Journal of Iron and Steel Research,International,2009,16(6):58.
[13]	潘红波,周刘涛,张建,等. 北极海洋平台用Q355E热轧H型钢连续冷却转变规律[J]. 钢铁研究学报,2017,29(8):660.(PAN Hong-bo,ZHOU Liu-tao,ZHANG Jian,et al. Continuous cooling transformation of Q355E hot rolled H-beam steel for offshore platform in an Arctic environment[J]. Journal of Iron and Steel Research,2017,29(8):660.)
[14]	陈燕. 针状铁素体管线钢的组织控制与性能研究[D]. 天津:天津大学,2013.(CHEN Yan. Research on Microstructure and Properties of Acicular Ferrite Pipeline Steel[D] Tianjin:Tianjin University,2013.)
[15]	张正延,孙新军,雍岐龙,等. Nb-Mo微合金高强钢强化机理及其纳米级碳化物析出行为[J]. 金属学报,2016,52(4):416.(ZHANG Zheng-yan,SUN Xin-jun,YONG Qi-long,et al. Precipitation behavior of nanometer-sized carbides in Nb-Mo microalloyed high strengh steel and its strengthening mechanism[J]. Acta Metallurgica Sinica,2016,52(4):416.)
[16]	徐祖耀. 应力对钢中贝氏体相变的影响[J]. 金属学报,2004(2):113.(XU Zu-yao. Effect of stress on bainite transformation in steel[J]. Acta Metallurgica Sinica,2004(2):113.)
[7]	YI H L,XU Y,SUN M X,et al. Influence of finishing cooling temperature and holding time on nanometer-size carbide of Nb-Ti microalloyed steel[J]. Journal of Iron and Steel Research,International,2014,21(4): 433.
[8]	Kestenbach H J,Campos S S,Morales E V. Role of interphase precipitation in microalloyed hot strip steels[J]. Materials Science and Technology,2006,22(6):615.
[9]	付立铭,单爱党,王巍. 低碳Nb微合金钢中Nb溶质拖曳和析出相NbC钉扎对再结晶晶粒长大的影响[J]. 金属学报,2010,46(7):833.(FU Li-ming,SHAN Ai-dang,WANG Wei. Effect of Nb solute drag and NbC precipitate pinning on the recrystallization grain growth in low carbon Nb-microacloyed steel[J]. Acta Metallurgica Sinica,2010,46(7):833.)
[10]	刘雪峰,贾涛,朱本强. Nb 对奥氏体→铁素体相变动力学影响的模型[J]. 东北大学学报,2016,37(5):642.(LIU Xue-feng,JIA Tao,ZHU Ben-qiang. Modeling the effect of Nb on austenite →ferrite phase[J].Journal of Northeastern University,2016,37(5):642.)
[11]	雍岐龙. 钢铁材料中的第二相[M]. 北京:冶金工业出版社,2006.(YONG Qi-long. Secondary Phase in Steel[M]. Beijing:Metallurgical Industry Press,2006.)
[12]	徐洲,赵连城. 金属固态相变原理[M]. 北京:科学出版社,2004.(XU Zhou,ZHAO Lian-cheng. Metal Solid Phase Transition Principle[M]. Beijing:Science Press,2004.)
[13]	潘红波,周刘涛,张建,等. 北极海洋平台用Q355E热轧H型钢连续冷却转变规律[J]. 钢铁研究学报,2017,29(8):660.(PAN Hong-bo,ZHOU Liu-tao,ZHANG Jian,et al. Continuous cooling transformation of Q355E hot rolled H-beam steel for offshore platform in an Arctic environment[J]. Journal of Iron and Steel Research,2017,29(8):660.)
[14]	陈燕. 针状铁素体管线钢的组织控制与性能研究[D]. 天津:天津大学,2013.(CHEN Yan. Research on Microstructure and Properties of Acicular Ferrite Pipeline Steel[D] Tianjin:Tianjin University,2013.)
[15]	张正延,孙新军,雍岐龙,等. Nb-Mo微合金高强钢强化机理及其纳米级碳化物析出行为[J]. 金属学报,2016,52(4):416.(ZHANG Zheng-yan,SUN Xin-jun,YONG Qi-long,et al. Precipitation behavior of nanometer-sized carbides in Nb-Mo microalloyed high strengh steel and its strengthening mechanism[J]. Acta Metallurgica Sinica,2016,52(4):416.)
[16]	徐祖耀. 应力对钢中贝氏体相变的影响[J]. 金属学报,2004(2):113.(XU Zu-yao. Effect of stress on bainite transformation in steel[J]. Acta Metallurgica Sinica,2004(2):113.)