Transactions of Materials and Heat Treatment

Title：Study on performance of carbonitride precipitation and properties in Nb-Ti microalloyed steels

Authors： Xu Nailong Wang Li Hong Jiyao Jin Xuejun

Unit： Shanghai JiaoTong University Central Research Institute of Baosteel

KeyWords： Nb-Ti microalloyed steel carbonitrides curling annealing

ClassificationCode：TG142

year,vol(issue):pagenumber：2014,39(5):121-125

Abstract：

The simulated curling and continuous annealing for microalloyed steels contained Nb and Ti were conducted,and the precipitation behavior of microalloyed carbonitrides in ferrite phase and the mechanical properties of steel after annealing were deeply investigated by using a combined technique of metallographic analysis and transmission electron microscopy(TEM)．The results show that the carbonitrides precipitate out from ferrite phase heavily between 600 and 700 ℃,which is a kind of complex (Nb,Ti)(C,N) with square shape and size from 10 to 100 nm. The precipitation quantity becomes fewer and the volume is smaller after continuous annealing at temperature about 800 ℃. The microstructure is ferrite and flocculent cementite after continuous annealing at temperature about 800 ℃, and the yield strength decreases, while the elongation increases with annealing temperature increasing.

Funds：

徐乃龙（1988-），男，硕士研究生金学军(1969-)，男，博士，教授,博导

Reference：

［1］蒋浩民, 陈庆欣, 苏海波, 等. 双相钢板成形性能试验研究[J]. 锻压技术, 2007, 32(6):76-78.Jiang Haomin, Chen Qingxin, Su Haibo, et al. Experimental study on the formability of dual phase steel[J]. Forging & Stamping Technology, 2007, 32(6):76-78.
［2］苑少强, 杨善武, 武会宾, 等. 含 Nb 微合金钢变形后弛豫及时效过程中的析出行为[J]. 金属热处理, 2005, 30(1): 24-28. Yuan Shaoqiang, Yang Shanwu, Wu Huibin, et al. Precipitation behavior during relaxation after deformation and aging in microalloy steel containing Nb[J]. Heat Treatment of Metals, 2005, 30(1): 24-28.
［3］赵明纯, 单以银, 杨柯. 时效处理对针状铁素体管线钢力学性能和抗硫化氢行为的影响[J]. 金属学报, 2004, 40(9): 948-954.Zhao Mingchun, Shan Yiyin, Yang Ke. Effect of aging treatment on mechanical property and H2S resistant behavior of acicular ferrite pipeline steels[J]. Acta Metallurgica Sinica, 2004, 40(9): 948-954.
［4］陆匠心, 王国栋. 一种Nb-Ti微合金钢微合金碳氮化物析出行为的研究[J]. 钢铁, 2005, 40(9): 69-72.Lu Jiangxin, Wang Guodong. Study on the performance of carbonitride precipitation in Nb-Ti microalloyed steels[J]. Iron & Steel, 2005, 40(9): 69-72.
［5］苑少强, 杨善武, 武会宾, 等. 多元微合金钢中的应变诱导复合析出[J]. 北京科技大学学报, 2003, 25(5): 414.Yuan Shaoqiang, Yang Shanwu, Wu Huibin, et al. Strain induced precipitation in multiple microalloy steel[J]. Journal of University of Science and Technology Beijing, 2003, 25(5): 414.
［6］王昭东, 曲锦波, 刘相华, 等. 松驰法研究微合金钢碳氮化物的应变诱导析出行为[J]. 金属学报, 2000, 36(6): 618.Wang Zhaodong, Qu Jinbo, Liu Xianghua, et al. Investigation of strain-induced precipitation behavior in a microalloying steel by stress relaxation method[J]. Acta Metallurgica Sinica, 2000, 36(6): 618.
［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, 41(8): 60-63.Cao Jianchun, Liu Qingyou, Yong Qilong, et al. Effect of niobium on microstructure and strengthening mechanism of HSLA steel[J]. Iron & Steel, 2006, 41(8): 60-63.
［8］Bai Yueguang, Wang Jianjun, Wan Tieli, et al. Role of Microalloy Elements in High Strength Steels for Automobile Girder[M]. Beijing: The Metallurgical Press,2000.
［9］谭静, 刘静,袁泽喜. V，Nb，Ti碳氮化物在铁素体中的析出与组织演变[J]. 武汉科技大学学报, 2006, 29(1): 29-32.Tan Jing, Liu Jing, Yuan Zexi. Precipitation of V, Nb, Ti Carbonitride in the ferrite and microstructure evolution[J]. Journal of Wuhan University of Science and Technology, 2006, 29(1): 29-32.
［10］李维娟, 康小兵. Nb、Ti 碳化物的溶解与析出对低C微合金钢组织和性能的影响[J]. 特殊钢, 2006, 27(6): 4-6.Li Weijuan, Kang Xiaobing. Effect of dissolution and precipitation of Nb-Ti carbides on structure and properties of low carbon microalloying steel[J]. Special Steel, 2006, 27(6): 4-6.
［11］徐洋, 衣海龙, 孙明雪, 等. 不同工艺下Nb-Ti微合金钢组织演变和析出行为[J]. 东北大学学报, 2012, 33(9): 1266-1269.Xu Yang, Yi Hailong, Sun Mingxue, et al. Microstructure evolution and precipitation behavior of Nb-Ti microalloyed steel under different processing[J]. Journal of Northeastern University, 2012, 33(9): 1266-1269.
［12］董洪波, 程龙. 控轧控冷条件下 Nb-V 钢碳氮化物的析出行为[J]. 宽厚板, 2001, 7(5):16-20.Dong Hongbo, Cheng Long. Precipitation behavior of Nb-V steel carbonitride under controlled rolling and cooling conditions[J]. Wide and Heavy Plate, 2001, 7(5):16-20.
［13］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 Qilong, Ma Mingtu, Wu Baorong. Microalloyed Steel-physical and Mechanical Metallurgy[M]. Beijing: China Machine Press, 1989.
［14］Radko Kaspar, Josef Siegfried Distl, Klaus-Joachim, et al. Changes in austenite grain structure of microalloyed plate steels due to multiple hot deformation[J]. Steel Research, 1988, 57(6): 271-448.
［15］Hyun Jo Jun, Kang K B, Park C G. Effects of cooling rate and isothermal holding on the precipitation behavior during continuous casting of Nb-Ti bearing HSLA steels[J]. Scripta Materialia, 2003, 49: 1081-1086.
［16］Hong S G, Jun H J, Kang K B, et al. Evolution of precipitations in the Nb-Ti-V microalloyed HSLA steels during reheating[J]. Scripta Materialia, 2003, 48: 1201-1206.
［17］Hong S G, Kang K B, Park C G. Strain-induced precipitation of NbC in Nb and Nb-Ti microalloyed HSLA steels[J]. Scripta Materialia, 2002, 46: 163-168.
［18］ Ashwin Pandit, Murugaiyan A, Saha Podder A, et al. Strain induced precipitation of complex carbonitrides in Nb-V and Ti-V microalloyed steels[J]. Scripta Materialia, 2005, 53: 1309-1314.

Service：

【This site has not yet opened Download Service】【Add Favorite】