The effects of the alloying elements of Cr, Mn and the cooling rates after hot deformation on the microstructures and mechanical properties of pearlite steels were studied. Results show that increasing Cr and decreasing Mn significantly increase the eutectoid transformation temperature of steel. The grain sizes of prior austenite of the steels after hot deformation are ∼12 µm. However, the high-Cr–low-Mn steel exhibits a finer interlamellar spacing and some better mechanical properties than that of the high-Mn–low-Cr steel. A full pearlite microstructure with an interlamellar spacing of 97 nm was obtained on the former steel, which exhibits a hardness of HRC49, a tensile strength of 1700 MPa and an elongation of 19%.
RidleyN. A review of the data on the interlamellar spacing of pearlite. Metall Mater Trans A. 1984;15:1019–1036. doi: 10.1007/BF02644694
2.
ZenerC. Kinetics of the decomposition of austenite. Trans AIME. 1946;167:550–595.
3.
WuKM, BhadeshiaHHDH. Extremely fine pearlite by continuous cooling transformation. Scripta Mater. 2012;67:53–56. doi: 10.1016/j.scriptamat.2012.03.019
4.
YahyaouiH, SidhomH, BrahamC, Effect of interlamellar spacing on the elastoplastic behavior of C70 pearlitic steel: experimental results and self-consistent modeling. Mater Des. 2014;55:888–897. doi: 10.1016/j.matdes.2013.10.062
5.
ElwazriAM, WanjaraP, YueS. The effect of microstructural characteristics of pearlite on the mechanical properties of hypereutectoid steel. Mater Sci Eng A. 2005;404:91–98. doi: 10.1016/j.msea.2005.05.051
6.
ToribioJ, GonzálezB, MatosJC, Role of the microstructure on the mechanical properties of fully Pearlitic eutectoid steels. Frattura Ed Integrità Strutturale. 2014;30:424–430.
7.
Garcia-MateoC, CaballeroFG, BhadeshiaHHDH. Acceleration of low-temperature bainite. ISIJ Inter. 2003;43:285–288.
8.
JaramilloRA, BabuSS, LudtkaGM, Effect of 30 T magnetic field on transformations in a novel bainitic steel. Scripta Mater. 2005;52:461–466. doi: 10.1016/j.scriptamat.2004.11.015
9.
HonjoM, KimuraT, HaseH. Effect of Cr on lamellar spacing and high-temperature stability in eutectoid steels. Tetsu-to-Hagane. 2015;101:221–227. doi: 10.2355/tetsutohagane.101.221
10.
ZhangH, PradeepKG, MandalS, Enhanced superplasticity in an Al-alloyed multicomponent Mn–Si–Cr–C steel. Acta Mater. 2014;63:232–244. doi: 10.1016/j.actamat.2013.10.034
11.
JangYS, PhanirajMP, KiDI, Effect of aluminum content on the microstructure and mechanical properties of hypereutectoid steels. Metall Mater Trans A. 2010;41:2078–2084. doi: 10.1007/s11661-010-0233-3
12.
HawboltEB, ChauB, BrimacombeJK. Kinetics of austenite-pearlite transformation in eutectoid carbon steel. Metall Mater Trans A. 1983;14:1803–1815. doi: 10.1007/BF02645550
13.
CaballeroFG, AndrésCGD, CapdevilaC. Characterization and morphological analysis of pearlite in a eutectoid steel. Mater Charact. 2000;45:111–116. doi: 10.1016/S1044-5803(00)00056-5
14.
BaeCM, NamWJ, ChongSL. Effect of microstructural features on ductility in hypo-eutectoid steels. Scripta Mater. 1999;41:605–610. doi: 10.1016/S1359-6462(99)00200-6
15.
ModiOP, DeshmukhN, MondalDP, Effect of interlamellar spacing on the mechanical properties of 0.65% C steel. Mater Charact. 2001;46:347–352. doi: 10.1016/S1044-5803(00)00113-3
16.
PorterDA, EasterlingKE, SmithGDW. Dynamic studies of the tensile deformation and fracture of pearlite. Acta Metall. 1978;26:1405–1422. doi: 10.1016/0001-6160(78)90156-6
17.
RastegariH, KermanpurA, NajafizadehA. Effect of initial microstructure on the work hardening behavior of plain eutectoid steel. Mater Sci Eng A. 2015;632:103–109. doi: 10.1016/j.msea.2015.02.040
18.
NakadaN, KogaN, TanakaY, Strengthening of pearlitic steel by ferrite/cementite elastic misfit strain. ISIJ Inter. 2015;55:2036–2038. doi: 10.2355/isijinternational.ISIJINT-2015-102
19.
TomotaY, WatanabeO, KanieA, Effect of carbon concentration on tensile behaviour of pearlitic steels. Mater Sci Technol. 2003;19:1715–1720. doi: 10.1179/026708303225008310
20.
UmemotoM, LiuZG, MasuyamaK, Influence of alloy additions on production and properties of bulk cementite. Scripta Mater. 2001;45:391–397. doi: 10.1016/S1359-6462(01)01016-8
21.
SongHR, KangEG, BaeCM, The effect of a Cr addition and transformation temperature on the mechanical properties of cold drawn hyper-eutectoid steel wires. Met Mater Int. 2006;12:239–243. doi: 10.1007/BF03027537
22.
ZengD, LuL, GongY, Optimization of strength and toughness of railway wheel steel by alloy design. Mater Des. 2016;92:998–1006. doi: 10.1016/j.matdes.2015.12.096
23.
LiS, YipTH, RamanujanRV, In situ TEM studies of the mechanisms of crack nucleation and propagation in fully lamellar microstructures. Mater Sci Technol. 2003;19:902–906. doi: 10.1179/026708303225004378
