|
|
Evolution of micron Ti(Cx,N1-x) in TSCR process of ultra-high strength hot stamping steel |
ZHANG Hao-hao1, WU Jia-lu1, LONG Mu-jun1, GUO Wei1, YANG Xiao-dong2, CHEN Deng-fu1 |
1. School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 2. Steel Mill, Pangang Group Xichang Steel and Vanadium Co.,Ltd., Panzhihua 615000,Sichuan, China |
|
|
Abstract In the process of producing ultra-high strength hot stamping steel by thin slab continuous casting and rolling (TSCR) process, the key to ensure product quality and smooth production is to correctly control the process parameters and reduce the precipitation of coarse second phase in the slab as much as possible. Clarifying the precipitation evolution law of coarse micron Ti(Cx,N1-x) precipitates in TSCR process has important guiding significance for quality control and process parameter optimization in actual production. Through the combination of thermodynamic calculation and experimental research, the precipitation evolution behavior of micron Ti(Cx,N1-x) precipitates in the continuous process of TSCR continuous casting and soaking of ultra-high strength hot stamping steel was studied in detail. The evolution law of “precipitation-remelting-coarsening” of micron Ti(Cx,N1-x) phase in this process is clarified, and its precipitation growth rate, remelting rate and coarsening rate are quantitatively analyzed. The results show that the coarse micron Ti(Cx,N1-x) precipitates in 22MnB5 steel begin to precipitate in the liquid phase at the end of solidification, and the solid rate is 0.912. With the continuous reduction of continuous casting temperature, the x value in micron Ti(Cx,N1-x) phase increases from 0.1 to 0.7, and the precipitated phase of Ti(Cx,N1-x) gradually changes from N-rich phase to C-rich phase. Micron Ti(Cx,N1-x) phase grows continuously during continuous casting cooling, partially dissolves in the matrix during heating up, and then grows again in the holding stage. In the cooling, heating and holding stages of continuous casting and soaking process of TSCR process, the average rates of particle growth, dissolution and coarsening of micron Ti(Cx,N1-x) precipitates are respectively 0.007 2、-0.001 5、1.95×10-4 μm/s.
|
Received: 28 January 2022
|
|
|
|
[1] |
金学军,龚煜,韩先洪,等.先进热成形汽车钢制造与使用的研究现状与展望[J].金属学报,2020,56(4):411.
|
[2] |
CHEN Q, MAO X, SUN X, et al. Study on second phase precipitation behavior of Ti microalloyed ultra-high strength steel during TSCR process[J]. Hot Working Technology, 2016,45(23):32.
|
[3] |
XIAO L J, WANG H J, XIANG L, et al. Microstructure and texture of Hi-B steel produced by TSCR process[J]. Chinese Journal of Engineering, 2016,38(2):241.
|
[4] |
殷瑞钰, 张慧. 新形势下薄板坯连铸连轧技术的进步与发展方向[J].钢铁, 2011,46(4):1.
|
[5] |
马银涛,李宁,杨涛.薄板坯连铸连轧无头轧制技术的应用[J].河北冶金,2021(6):37.
|
[6] |
张剑君,毛新平,王春峰,等.薄板坯连铸连轧炼钢高效生产技术进步与展望[J].钢铁,2019,54(5):1.
|
[7] |
骆忠汉,仇圣桃,陈圣林.薄板坯连铸连轧生产电工钢(取向及无取向)的技术开发及应用[J].连铸,2017 (4):42.
|
[8] |
毛新平,孙新军,汪水泽.薄板坯连铸连轧流程钛微合金钢控制轧制技术[J].钢铁,2016,51(1):52.
|
[9] |
毛新平,高吉祥,柴毅忠.中国薄板坯连铸连轧技术的发展[J].钢铁,2014,49(7):49.
|
[10] |
WANG P, LI C, WANG L, et al. Thermodynamic analysis of TiN precipitation in SWRH92A high carbon tire cord steel under the influence of solute micro-segregations during solidification[J]. Metallurgical and Materials Transactions B, 2021,52(4), 2056.
|
[11] |
MA W J, BAO Y P, ZHAO L H, et al. Control of the precipitation of TiN inclusions in gear steels[J]. International Journal of Minerals Metallurgy and Materials, 2014, 21(3):234.
|
[12] |
吴振华. 含钛钢中夹杂物析出行为及其对钢组织的影响研究[D]. 武汉:武汉科技大学, 2015.
|
[13] |
WAN Z, YONG Q, FU X, et al. Inclusion precipitation behaviors in Ti-containing high strength steel[J]. Journal of Wuhan University of Science and Technology, 2017,40(3):161.
|
[14] |
陈波涛,张泽峰,邢立东,等.含钛微合金钢凝固过程中TiN的析出行为分析[J].连铸,2021(3):28.
|
[15] |
杨忠民,王凯,孙秀,等.铌钛微合金钢铸坯晶界铁素体形貌与晶界裂纹[J].钢铁,2018,53(11):70.
|
[16] |
吴俊平,靳星,龙木军,等.含钛微合金钢低温冲击韧性波动的原因与改进[J].中国冶金,2017,27(12):59.
|
[17] |
李冰,郑磊,崔天成,等.钼、铬对低碳铌钛微合金钢连续冷却转变行为的影响[J].钢铁,2011,46(10):80.
|
[18] |
娄艳芝,柳得橹,毛新平,等.CSP工艺钛微合金钢中的碳氮化钛析出相[J].钢铁,2010,45(2):70.
|
[19] |
Prikryl M,Kroupa A,Weatherly G C, et al. Precipitation behavior in a medium carbon, Ti-V-N microalloyed steel[J]. Metallurgical and Materials Transactions A, 1996, 27(5):1149.
|
[20] |
Gunduz S,Erden M A,Karabulut H, et al. The effect of vanadium and titanium on mechanical properties of microalloyed PM steel[J]. Powder Metallurgy and Metal Ceramics, 2016, 55(5/6):277.
|
[21] |
TAO L,LONG M J,CHEN D F, et al. Effect of coarse TiN inclusions and microstructure on impact toughness fluctuation in Ti microalloyed steel[J]. Journal of Iron and Steel Research International, 2018, 25(10): 1043.
|
[22] |
GUI L,LONG M,ZHANG H, et al. Study on the precipitation and coarsening of TiN inclusions in Ti-microalloyed steel by a modified coupling model[J]. Journal of Materials Research and Technology, 2020, 9(3): 5499.
|
[23] |
Du J,Strangwood M,Davi C L. Effect of TiN particles and grain size on the charpy impact transition temperature in steels[J]. Journal of Materials Science and Technology, 2012, 28(10): 878.
|
[24] |
Ghosh A, Ray A, Chakrabarti D, et al. Cleavage initiation in steel: Competition between large grains and large particles[J]. Materials Science and Engineering A,2013,561(20):126.
|
[25] |
MA W J, BAO Y P, ZHAO L H, et al. Control of the precipitation of TiN inclusions in gear steels[J]. International Journal of Minerals Metallurgy and Materials, 2014, 21(3):234.
|
[26] |
Ghosh A, Ray A, Chakrabarti D, et al. Cleavage initiation in steel: Competition between large grains and large particles[J]. Materials Science and Engineering A, 2013, 561(20): 126.
|
[27] |
JIANG Yue-dong, XUE Zheng-liang, ZHANG Jing. Genetic analysis for large TiN inclusions in wire rod for tire cord steel of SWRH82A[J].Journal of Iron and Steel Research(International),2014,21(s1):91.
|
[28] |
WAN X L, WU K M, HUANG G, et al. In situ observation of austenite grain growth behavior in the simulated coarse-grained heat-affected zone of Ti-microalloyed steels[J]. Journal of Mineral Metallurgy and Materials, 2014, 21(9): 878.
|
[29] |
MA W J, BAO Y P, ZHAO L H, et al. Control of the precipitation of TiN inclusions in gear steels[J]. International Journal of Minerals, Metallurgy and Materials, 2014, 21(3): 234.
|
[30] |
WANG Y, BAO Y, WANG M,et al. Precipitation and control of BN inclusions in 42CrMo steel and their effect on achinability[J]. International Journal of Minerals, Metallurgy and Materials, 2013, 20(9): 842.
|
[31] |
Kawashita Y, Suito H. Precipitation behavior of Al-Ti-ON inclusions in unidirectionally solidified Fe-30 mass% Ni alloy[J]. ISIJ International, 1995, 35(12): 1468.
|
[32] |
Volley V R. A semi-analytical model of microsegregation and coarsening in a binary alloy[J]. Journal of Crystal Growth, 1999, 197(1/2):325.
|
[33] |
LIU Y, ZHANG L, DUAN H, et al. Extraction, thermodynamic analysis and precipitation mechanism of MnS-TiN complex inclusions in low-sulfur steels[J]. Metallurgical and Materials Transactions A, 2016, 47(6): 3015.
|
[34] |
Ghosh A. Mathematical model for prediction of composition of inclusions formed during solidification of liquid steel[J]. ISIJ International, 2009, 49(12): 1819.
|
[35] |
高静娜. CSP薄板连铸坯二次冷却凝固过程的研究[D].秦皇岛:燕山大学,2006.
|
[36] |
ElBealy M, Thomas B G. Prediction of dendrite arm spacing for low alloy steel casting processes[J]. Metallurgical and Materials Transactions B, 1996, 27(4): 689.
|
[37] |
郭伟,龙木军,吴家璐,等.22MnB5钢溶质分配系数及TiN析出对微观偏析的影响[J].钢铁,2022,57(3):44.
|
[38] |
雍岐龙,吴宝榕,孙珍宝,等.二元微合金碳氮化物的化学组成及固溶度的理论计算[J].钢铁研究学报,1989,1(4):47.
|
[39] |
雍岐龙,孙新军,郑磊,等.钢铁材料中第二相的作用[J].科技创新导报,2009(8):2.
|
[40] |
马红旭,李友国.硅钢中析出物的尺寸分布以及体积分数的测定[J].材料科学与工程,2002,20(3):328.
|
[1] |
WU Xu-feng, ZHANG Cai-gui, WANG De-yong. Effect slag modification on vortex entrapment in ladle[J]. CONTINUOUS CASTING, 2022, 41(2): 41-46. |
[2] |
LI Wei, TAN Zheng-jun, CHENG Jin-jun, LIN Qian, ZHANG Li-qiang. Quality improvement and practice of high speed continuous casting of billet based on secondary cooling optimization[J]. CONTINUOUS CASTING, 2022, 41(2): 95-99. |
[3] |
YANG Yue-biao, LI Zong-qiang, DENG Shen, FAN Lei, LIU Qing-you, ZHAO Zheng-zhi. Low temperature impact toughness controlling for Ti-microalloyed high strength steel[J]. Iron and Steel, 2021, 56(3): 41-50. |
[4] |
ZHANG Lei, ZHAI Bing-yu, WANG Wan-lin. A review of thin slab casting and formation of slab surface defects[J]. CONTINUOUS CASTING, 2020, 39(4): 22-28. |
[5] |
ZHU Li-guang, ZHANG Li-min, XIAO Peng-cheng, ZHENG Ying-hui, JIANG Zhao-yang, ZHAO Jian-ping. Analysis and control of slag inclusion defects of low carbon steel slab[J]. CONTINUOUS CASTING, 2020, 39(2): 36-40. |
[6] |
AI Xingang,HAN Dong,LI Shengli,LIU Haixiao,. Production practice and prospect of external #br# liquid mold flux in continuous casting[J]. Iron and Steel, 2019, 54(8): 132-136. |
|
|
|
|