The influence of zirconium on the mechanical properties and phase transformation was investigated in low carbon steel. First, the steels are subjected to a special thermomechanical regime, and the hot rolled plates were used to characterise the tensile properties and impact toughness. Second, the phase transformation behaviour of the steels with various Zr contents was evaluated by both dilatometry and metallography. Finally, to confirm the existence of Zr containing precipitates in the Zr added steels, transmission electron microscopy and energy dispersive spectroscopy were used. It was verified that plenty of fine spherical (Nb,Ti,Zr)C, which is identified to be nearly 10 nm, can be formed when the concentration of Zr is in the range of 0.015–0.030. The effects of zirconium on the phase transformation, including proeutectoid ferrite and pearlite transformation, and mechanical properties evolution were also identified and discussed.
BhattacharyaD.: ‘Effect of sulfur and zirconium on the machinability and mechanical properties of AISI 1045 steels’, Metall. Trans. A, 1981, 12A, 973–985. doi: 10.1007/BF02643478
2.
HeK. J. and BakerT. N.: ‘Effect of zirconium additions on austenite grain coarsening of C-Mn and microalloy steels’, Mater. Sci. Eng. A, 1998, A256, 111–119. doi: 10.1016/S0921-5093(98)00804-1
3.
HeK. J. and BakerT. N.: ‘Zr-containing precipitates in a Ti-Nb microalloyed HSLA steel containing 0.016wtZr addition’, Mater. Sci. Eng. A, 1996, A215, (1/2), 57–65.
4.
CavazosJ. L.: ‘Characterization of precipitates formed in a ferritic stainless steel stabilized with Zr and Ti additions’, Mater. Charact., 2006, 56, 96–101. doi: 10.1016/j.matchar.2005.05.006
5.
WangH. R., WangW. and GaoJ. Q.: ‘Precipitates in two Zr-bearing HSLA steel plates’, Mater. Lett., 2010, 64, 219–222. doi: 10.1016/j.matlet.2009.10.053
6.
SakataK. and SuitoH.: ‘Grain-growth-inhibiting effects of primary inclusion particles of ZrO2 and MgO in Fe-10massNi alloy’, Metall. Mater. Trans. A, 2000, 31A, 1213–1223. doi: 10.1007/s11661-000-0117-z
7.
KarasevV. and SuitoH.: ‘Effect of particle size distribution on austenite grain growth in Fe-0.05massC alloy deoxidized with Mn-Si’, Ti, Mg, Zr and Ce, ISIJ Int., 2006, 46, 718–727. doi: 10.2355/isijinternational.46.718
8.
TitovV., InoueR. and SuitoH.: ‘Grain-growth-inhibiting effects of TiC and ZrC precipitates in Fe-0.150.30massC alloy’, ISIJ Int., 2008, 48, 301–309.
9.
ZhengL., YuanZ. X., SongS. H., XiT. H. and WangQ.: ‘Austenite grain growth in heat affected zone of Zr-Ti bearing microalloyed steel’, J. Iron Steel Res. Int., 2012, 19, 73–78. doi: 10.1016/S1006-706X(12)60063-6
10.
ChenY. T., ChenX., DingQ. F. and ZengJ.: ‘Microstructure and inclusion characterization in the simulated coarse-grain heat affected zone with large heat input of a Ti-Zr microalloyed HSLA steel’, Acta Metall. Sinica, 2005, 18, 96–106.
11.
GuoA. M., LiS. R., GuoJ., LiP. H., DingQ. F., WuK. M. and HeX. L.: ‘Effect of zirconium addition on the impact toughness of the heat affected zone in a high strength low alloy pipeline steel’, Mater. Charact., 2008, 59, 134–139. doi: 10.1016/j.matchar.2006.11.028
12.
JiangM., HuZ. Y., WangX. H. and PakJ. J.: ‘Characterization of microstructure and non-metallic inclusions in Zr-Al deoxidized low carbon steel’, ISIJ Int., 2013, 53, 1386–1391. doi: 10.2355/isijinternational.53.1386
13.
ShiM. H., ZhangP. Y. and ZhuF. X.: ‘Toughness and microstructure of coarse grain heat affected zone with high heat input welding in Zr-bearing low carbon steel’, ISIJ Int., 2014, 54, 188–192. doi: 10.2355/isijinternational.54.188
14.
ShiM. H., ZhangP. Y., WangC. and ZhuF. X.: ‘Effect of high heat input on toughness and microstructure of coarse grain heat affected zone in Zr bearing low carbon steel’, ISIJ Int., 2014, 54, 932–937. doi: 10.2355/isijinternational.54.932
15.
WangC., MisraR. D. K., ShiM. H., ZhangP. Y., WangZ. D., ZhuF. X. and WangG. D.: ‘Transformation behavior of a Ti-Zr deoxidized steel: microstructure and toughness of simulated coarse grain heat affected zone’, Mater. Sci. Eng. A, 2014, A594, 218–228. doi: 10.1016/j.msea.2013.11.028
16.
BakerT. N.: ‘Role of zirconium in microalloyed steels: a review’, Mater. Sci. Technol., 2015, 31, 265–294. doi: 10.1179/1743284714Y.0000000549
17.
PaceyA. J., KayaliS. and KerrH. W.: ‘The effects of Mo, Zr and Ti additions on submerged ARC weld metal I. microstructure’, Can. Metall. Q., 1982, 21, 309–318. doi: 10.1179/cmq.1982.21.3.309
18.
AliakbarzadehH., TamizifarM., MirdamadiSh. and AbdolhosseiniA.: ‘Mechanical properties and microstructures of Zr-microalloyed cast steel’, ISIJ Int., 2005, 45, 1201–1204. doi: 10.2355/isijinternational.45.1201
19.
AliakbarzadehH., MirdamadiSh. and TamizifarM.: ‘Effect of low Zr addition on microalloyed cast steel’, Mater. Sci. Technol., 2010, 26, 1373–1376. doi: 10.1179/026708310X12798092639061
20.
GuoJ., ShangC. J., GuoA. M., GuoH., YangS. W. and HeX. L.: ‘Effect of micro-zirconium addition on the carbonitride precipitation and austenite grain coarsening in Mn-Mo-Cu-Nb-B structure steel’, J. Univ. Sci. Technol. Beijing, 2008, 30, 1236–1243.
21.
MoonJ., JangM. H., KangJ. Y. and LeeT. H.: ‘The negative effect of Zr addition on the high temperature strength in alumina-forming austenitic stainless steels’, Mater. Charact., 2014, 87, 12–18. doi: 10.1016/j.matchar.2013.10.029
22.
LiX. B., MinY., LiuC. J. and JiangM. F.: ‘Effect of Mg addition on the characterization of γ–α phase transformation during continuous cooling in low carbon steel’, Steel Res. Int., DOI 10/srin.2014005171002.
23.
LiX. B., MinY., LiuC. J. and JiangM. F.: ‘Study on the formation of intragranular acicular ferrite in a Zr–Mg–Al deoxidized low carbon steel’, Steel Res. Int., DOI 10/srin.2015001671002.
24.
CuiZ. Q. and TanY. C.: ‘Metal science and heat treatment’, 2008, Beijing, Machinery Industry Press.
25.
SarmaD. S., KarasevA. V. and JonssonP. G.: ‘On the role of non-metallic inclusions in the nucleation of acicular ferrite in steels’, ISIJ Int., 2009, 49, 1063–1074.
26.
Díaz-FuentesM., MadariagaI. and GutiérrezI.: ‘Acicular ferrite microstructures and mechanical properties in a low carbon wrought steel’, Mater. Sci. Forum, 1998, 284-286, 245–252. doi: 10.4028/www.scientific.net/MSF.284-286.245
27.
EdmondsD. V. and CochraneR. C.: ‘Structure-property relationships in bainitic steels’, Metall. Mater. Trans. A, 21A, 1990, 1527–1540. doi: 10.1007/BF02672567
28.
WangX. M., ShangC. J., YangS. W., HeX. L. and LiuX. Y.: ‘The refinement technology for bainite and its application’, Mater. Sci. Eng. A, 2006, A438-A440, 162–165.
29.
ChoiE., NamT. H., OhJ. T. and ChoB. S.: ‘An isolation bearing for highway bridges using shape memory alloys’, Mater. Sci. Eng. A, 2006, A438-A440, 1081–1084. doi: 10.1016/j.msea.2006.05.098
30.
YakubtsovA., PoruksP. and BoydJ. D.: ‘Microstructure and mechanical properties of bainitic low carbon high strength plate steels’, Mater. Sci. Eng. A, 2008, A480, 109–116. doi: 10.1016/j.msea.2007.06.069
31.
LiY. Q., ChenG. S., ZhangJ. F. and LiuJ. Y.: ‘Effect of trace elements on the grain boundaries in some superalloys’, Prog. Nat. Sci., 2000, 10, 331–341.
32.
ChenJ. X.: ‘Common use chart and thermodynamic data for steelmaking’, 2010, Beijing, Metallurgical Industry Press.
33.
LiuH. L., LiuC. J. and JiangM. F.: ‘Effect of rare earths on impact toughness of a low-carbon steel’, Mater. Des., 2012, 33, 306–312. doi: 10.1016/j.matdes.2011.06.042
34.
OffermanS. E., VandijkN. H., RekveldtM. T., SietsmaJ. and van der ZwaagS.: ‘Ferrite/pearlite band formation in hot rolled medium carbon steel’, Mater. Sci. Technol., 2002, 18, 297–303. doi: 10.1179/026708301225000752
35.
PollardB.: ‘Effect of manganese content on sulphide shape control by zirconium in steel’, Met. Technol., 1974, 1, 343–347. doi: 10.1179/030716974803287582
36.
HallE. O.: ‘The deformation and ageing of mild steel: III discussion of results’, Proc. Phys. Soc. B, 1951, 64B, 747–753. doi: 10.1088/0370-1301/64/9/303
37.
PetchN. J.: ‘The cleavage strength of polycrystals’, J. Iron Steel Inst., 1953, 174, 25–28.
