正火工艺对冷轧态低合金低温钢组织及拉伸性能的影响

doi:10.11896/j.issn.1005-023X.2017.06.020

Abstract
Figure/Table
References
Related Citation (15)

Download:

Full Text ( PDF ) (2447KB)
Export: BibTeX | EndNote (RIS)

Abstract The effect of normalizing process on evolution of microstructures and tensile properties of cold-rolled low-alloy cryogenic steel plate was investigated by tensile test, microhardness test, OM, SEM and TEM. The results showed that the cold-rolled samples were in recovery when the heat treatment temperature was 700 ℃,and the dislocations in ferrite matrix featured severe tangles configuration or grid structure. As the normalizing temperature increased to 750 ℃ and 800 ℃, recrystallization and phase transformation processes occurred simultaneously, and formed granular structure characterized by M/A islands. The microstructure of 860 ℃ normalized sample was composed of equiaxed ferrite and dispersed pearlite, and dislocations were sparse dislocation wall configuration. The ferrite grain size of cold-rolled sample with 23% reduction rate after 860 ℃ normalizing was refined to 10.2 μm, while that of cold-rolled sample with 10% reduction rate was 12.0 μm. The optimal combination of strength and ductility was obtained at the normalizing temperature of 860 ℃, and the product of strength and ductility were 20 007 MPa% and 17 850 MPa% for the cold-rolled samples with 10% and 23% reduction rate, respectively. Compared with that of 700 ℃ normalized sample, the number of microvoids near tensile fracture and necking zone in 860 ℃ normalized sample reduced significantly, indicating the improvement of tensile deformation ability.

Key words： low-alloy cryogenic steel cold rolling normalizing process microstructure evolution tensile deformation

Published: 25 March 2017 Online: 2018-05-02

CLC number:

TG142.1

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHOU Shuangshuang
	LIU Xiqin
	LIU Zili
	HOU Zhiguo
	TIAN Qingchao

Cite this article:

ZHOU Shuangshuang,LIU Xiqin,LIU Zili, et al. Effect of Normalizing Process on Microstructure Evolution and Tensile
Properties of Cold-rolled Low-alloy Cryogenic Steel[J]. Materials Reports, 2017, 31(6): 98-104.

URL:

https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.06.020 OR https://www.mater-rep.com/EN/Y2017/V31/I6/98

1 Yi H L, Du L X, Wang G D, et al. Development of Nb-V-Ti hot-rolled high strength steel with fine ferrite and precipitation streng-thening[J]. J Iron Steel Res Int,2009,16(4):72.
2 Show B K, Veerababu R, Balamuralikrishnan R, et al. Effect of vanadium and titanium modification on the microstructure and mechanical properties of a microalloyed HSLA steel[J]. Mater Sci Eng A,2010,527(6):1595.
3 Zhao Z Z, Jin G C, Feng N, et al. Microstructure evolution and mechanical properties of 1 000 MPa cold rolled dual-phase steel[J]. Trans Nonferr Met Soc China,2009,19:s563.
4 Rocha R O, Melo T M F, Pereloma E V, et al. Microstructural evolution at the initial stages of continuous annealing of cold rolled dual-phase steel[J]. Mater Sci Eng A,2005,391(1):296.
5 Yang K, Gou H, Zhang B, et al. Microstructures and fracture features of cold-rolled low carbon steel sheet after annealing and mechanical stress concurrently loaded[J]. Mater Sci Eng A,2009,502(1):126.
6 Estay, Li C J, Purdy G R. Carbide dissolution and austenite growth in the intercritical annealing of Fe-C-Mn dual phase steels[J]. Can Metall Q,1984,23(1):121.
7 Chen J, Shen X J, Ji F Q, et al. Effect of annealing time on microstructure and mechanical properties of cold-rolled niobium and titanium bearing micro-alloyed steel strips[J]. J Iron Steel Res Int,2013,20(9):86.
8 Bo M A, Yan P, Bin J I A, et al. Static recrystallization kinetics model after hot deformation of low-alloy steel Q345B[J]. J Iron Steel Res Int,2010,17(8):61.
9 Li Z, Wang T S, Zhang X J, et al. Annealing softening behaviour of cold-rolled low-carbon steel with a dual-phase structure and the resulting tensile properties[J]. Mater Sci Eng A,2012,552:204.
10 Wang L M,Yang H, Wu J F, et al. Effect of heat-treatment on the micro-structure and drawing performance of the medium carbon steel wine[J]. Mater Rev,2011,25(S1):523(in Chinese).
王利明, 杨恒, 吴建峰, 等. 热处理工艺对中碳钢丝显微组织及其拉拔性能的影响[J]. 材料导报,2011,25(专辑Ⅻ):523.
11 Belyakov A, Wei F G, Tsuzaki K, et al. Incomplete recrystallization in cold worked steel containing TiC[J]. Mater Sci Eng A,2007,471(1):50.
12 Rollett A, Humphreys F J, Rohrer G S, et al. Recrystallization and related annealing phenomena[M]. NL:Elsevier,2004.
13 Shen B, Chen P L, Zhang H H, et al. Effect of normalizing process on banded structure in thick high strength ship plate [J]. Heat Treat,2012,27(2):19(in Chinese).
沈斌, 陈佩丽, 张恒华, 等. 正火工艺对高强度厚船板钢带状组织的影响[J]. 热处理,2012,27(2):19.
14 Vandeputte S, Vanderschhuern D, Claessens S, et al. Modern steel grades covering all needs of the automotive industry[C]//9th International Conference on Steel Sheet Metal. Leuven, Belgium,2001:405.
15 Najafi H, Rassizadehghani J, Asgari S. As-cast mechanical properties of vanadium/niobium microalloyed steels[J]. Mater Sci Eng A,2008,486(1):1.
16 Maropoulos S, Ridley N. Inclusions and fracture characteristics of HSLA steel forgings[J]. Mater Sci Eng A,2004,384(1):64.
17 Orown E. Symposium on internal stresses in metals and alloys[M].London: Institute of Metals,1948:451.
18 Luo Y, Peng J, Wang H, et al. Effect of tempering on microstructure and mechanical properties of a non-quenched bainitic steel[J]. Mater Sci Eng A,2010,527(15):3433.
19 Goods S H, Brown L M.Overview No. 1: The nucleation of cavities by plastic deformation[J]. Acta Metall,1979,27(1):1.
20 Humphreys F J. A unified theory of recovery, recrystallization and grain growth, based on the stability and growth of cellular microstructures-I. The basic model[J]. Acta Mater,1997,45(10):4231.
21 Ma J, Zhang X Y, Cheng S X, et al. Influence of partitioning temperature on microstructure and mechanical properties of (B+M/A) X80 high deformability pipeline steel[J]. Mater Rev: Res,2014,28(11):96(in Chinese).
马晶, 张骁勇, 程时遐, 等. 配分温度对 (B+ M/A) X80 大变形管线钢组织和性能的影响[J]. 材料导报:研究篇,2014,28(11):96.
22 Zhou Y, Jia T, Zhang X, et al. Investigation on tempering of granular bainite in an offshore platform steel[J]. Mater Sci Eng A,2015,626:352.
23 Zhou Y L, Xu Y, Chen J, et al. Experimental study of the impact fracture behavior of FH550 offshore platform steel [J]. Acta Metall Sin,2011,47(11):1382(in Chinese).
周砚磊, 徐洋, 陈俊, 等. FH550级海洋平台用钢冲击断裂行为实验研究[J]. 金属学报,2011,47(11):1382.
24 Lajtai E Z. A theoretical and experimental evaluation of the Griffith theory of brittle fracture[J]. Tectonophysics,1971,11(2):129.
25 Chen J, Tang S, Liu Z Y, et al. Microstructural characteristics with various cooling paths and the mechanism of embrittlement and toughening in low-carbon high performance bridge steel[J]. Mater Sci Eng A,2013,559:241.
26 Davis C L, King J E. Cleavage initiation in the intercritically reheated coarse-grained heat-affected zone: Part I. Fractographic evidence[J]. Metall Mater Trans A,1994,25(3):563.
27 Tang D, Dai H, Sun J Q, et al. Research of asymmetrical cold rol-ling and recrystallization annealing experiment of flange plate steel [J]. J Mater Eng,2011(5):81(in Chinese).
唐荻, 戴辉, 孙蓟泉,等. 翼缘板钢非对称冷轧及再结晶退火实验研究[J]. 材料工程,2011(5):81.