Article
Engineering, Mechanical
Chun-Peng Liu, Guan-Zhen Zhang, Peng-Tao Liu, Chun-Huan Chen, Rui-Ming Ren
Summary: In the process of rolling contact fatigue (RCF), plastic strain and stress field contribute to grain refinement, leading to the generation of dislocations and subboundaries that evolve into high-angle grain boundaries, accelerating the propagation of RCF cracks.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Metallurgy & Metallurgical Engineering
Mukund Manish, Pranav Kumar Tripathi, Thayappa Hosahali, D. Satish Kumar, Ravishekar Konangi
Summary: JSW Steel's Vijayanagar works operates a 44 T, eight-strand billet caster for continuous casting. The large differences between the central and the end strands from the shroud affect the cleanliness and solidification between different strands. Water modelling studies were conducted to improve steel cleanliness in central strands, and a combination of wedge and V-shaped dams resulted in increased residence time without affecting flow behavior. Plant trials confirmed a 21% reduction in inclusion area percentage, demonstrating improved steel cleanliness in central strands.
IRONMAKING & STEELMAKING
(2023)
Article
Materials Science, Multidisciplinary
Zhaozhen Cai, Jiazhi An, Biao Cheng, Miaoyong Zhu
Summary: Austenitic grain size is an important factor affecting the hot ductility of steel slabs during continuous casting. The increase in austenite grain size decreases the volume fraction of film-like proeutectoid ferrite and the average diameter of Nb(C, N) precipitates, leading to strain concentration and a decrease in hot ductility.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Engineering, Chemical
Jun Hua, Jinzhi Pan, Pengtao Liu, Guanzhen Zhang, Si Wu, Chong Su, Chunhuan Chen, Xiujuan Zhao, Ruiming Ren
Summary: This study utilized scanning electron microscopy with an electron backscatter diffraction system to investigate the refinement mechanism of proeutectoid ferrite and eutectoid ferrite in a D2 wheel steel under rolling contact conditions. The results showed that as the shear strain increased, the grain size of ferrite decreased and the dislocation density decreased gradually.
Article
Metallurgy & Metallurgical Engineering
Fengkang Wang, Hang He, Wanlin Wang, Kun Dou, Jie Zeng, Deng Luo
Summary: The mechanism of crack propagation during the hot-rolling process of a medium-carbon 40Cr alloy steel was investigated. It was found that the depth of cracks can reach 2.5 mm, with lengths up to 2000-3000 mm along the rolling direction. Thermodynamic calculations showed that low oxygen content was beneficial for the selective oxidation of Si, Mn, and Cr elements. In addition, in situ experiments revealed that submicron Cr-Mn-Si-O particles can refine austenite grains and induce the precipitation of chain proeutectoid ferrite, leading to the propagation of surface cracks during hot-rolling.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Wen-bin Xin, Yu-yu Liang, Jing Zhang, Qing-yang Meng, Jun Peng, Yong-chun Deng, Yin-ju Jiang
Summary: The effect of As content on the hot ductility of steel with 0.17 wt.% Cu was investigated. Increasing the As content from 0 to 0.15 wt.% widened the hot ductility trough and pushed it into the high-temperature regime. However, when the As content exceeded 0.10 wt.%, significant hot ductility deterioration was observed.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Masato Enomoto, Koutarou Hayashi
Summary: The temporal evolution of grain size distribution in Fe-0.1C and Fe-0.1C-3Mn alloys was observed using EBSD IPF maps. The spatial GSD was predicted using the Saltykov method and compared with the grain growth simulation by the A-L model. The mobility of grain boundaries in the Fe-0.1C alloy was lower than that of high-purity Fe ferrite grain boundaries, while the spatial GSD and average grain radius in the Fe-0.1C-3Mn alloy were compared with the A-L model incorporating solute drag caused by carbon and Mn segregation.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Jeferson L. Klug, Samuel L. S. Medeiros, Kelley T. Matos, Carlos A. Azevedo, Edson A. Maranhao, Jose A. C. Ferreira
Summary: A new mould flux was designed to control the crystallization kinetics and decrease the longitudinal cracking index in continuous casting of hypo-peritectic steel slabs.
IRONMAKING & STEELMAKING
(2023)
Article
Materials Science, Multidisciplinary
Seong Mook Cho, Brian G. Thomas, Jong-Yeon Hwang, Jong-Geun Bang, Il-Sin Bae
Summary: The research focuses on particle capture mechanisms in continuous steel casting and analyzes the process in slab casters using computational modeling. The model predictions are validated with plant measurements, revealing the distribution patterns of large particle captures.
Article
Materials Science, Multidisciplinary
Somayeh Khani, Heinz Palkowski, Klaus Schwerdtfeger
Summary: In this study, open channel hydraulics was used to calculate the water pool height between the roll and strand in continuous slab casting. The results showed that the hydraulic theory could predict water profiles in the nip of continuous casting rolls accurately.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Engineering, Mechanical
Ali Keramatian, Abbas Bahrami, Amir Hossein Darougheh, Shahin Zare
Summary: This study investigates the root cause of unexpected brittle transverse cracking in a carbon steel slab, finding that the chemical composition of the failed slab exceeded standard ranges, leading to grain boundary de-cohesion and trans granular fracture as dominant features on the fracture surface.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Chemistry, Physical
Fan Zhao, Hao Hu, Xinhua Liu, Zhihao Zhang, Jianxin Xie
Summary: The study found that the ferrite-pearlite characteristics have little effect on the growth of austenite grains, while deformation significantly impacts the growth of austenite grains. Deformation can crush the as-cast grains, make the segregation bands fine and dispersed, further refining the austenite grains.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Qiyu Wang, Shenghu Chen, Xinliang Lv, Haichang Jiang, Lijian Rong
Summary: This study investigates the role of delta-ferrite in fatigue crack growth under solution treated and accelerated aged conditions. It is found that the fatigue crack growth resistance is higher in samples containing delta-ferrite under solution treated conditions. However, a significant deterioration of fatigue crack growth resistance is observed in the delta-ferrite containing samples after accelerated aging treatment.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Rama Srinivas Varanasi, Motomichi Koyama, Yuki Shibayama, Eiji Akiyama
Summary: The present work investigates the fracture mechanisms in a dual-phase steel and reveals the dominant brittle fracture contrary to conventional wisdom. The crack initiation occurs via martensite cracking along the prior austenite grain boundaries, while the crack propagation in ferrite primarily occurs via brittle cleavage cracking. The study also clarifies the micro mechanisms associated with the sharp and blunt martensite cracks and occasional ductile ferrite fracture.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Green & Sustainable Science & Technology
Mahdi Hashemi Beni, Milad Morad Bazofti, Babak Golkar, Yadollah Saboohi, Hamid Mokhtari, Bahar Milani
Summary: The aim of this paper is to provide a solution to decrease water consumption in the slab-cooling unit of Mobarakeh Steel Complex in Iran. The proposed solution includes modeling the transient heat transfer process, designing and optimizing a hybrid cooling system using Genetic Algorithm, and reducing water consumption by 88.3% annually.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Jianhua Chu, Qiyao Yu, Kun Han, Lidong Xing, Yanping Bao, Wei (Alex) Wang
Article
Materials Science, Multidisciplinary
Lidong Xing, Jianlong Guo, Xin Li, Zefeng Zhang, Min Wang, Yanping Bao, Fanzheng Zeng, Botao Chen
MATERIALS TODAY COMMUNICATIONS
(2020)
Article
Metallurgy & Metallurgical Engineering
Lidong Xing, Zefeng Zhang, Yanping Bao, Botao Chen, Fanzheng Zheng, Min Wang
Summary: Despite advancements in continuous casting technology, small cracks can still occur during the production of special steel, with the main issue being excessive shrinkage in the corners due to uneven solidification, leading to the formation of air gaps between the billet and the mold, ultimately resulting in crack formation.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Lidong Xing, Xiaoyue Fan, Min Wang, Lihua Zhao, Yanping Bao
Summary: The study found that proeutectoid ferrite in medium-carbon sulfur-containing blooms is more developed compared to those with lower sulfur content, and sulfur is beneficial to the formation of ferrite. MnS inclusions serve as the core of proeutectoid ferrite, with the number of precipitated MnS inclusions positively correlated to the area fraction of proeutectoid ferrite. The Mn-depleted zone around MnS inclusions is identified as the direct inducing factor for proeutectoid ferrite formation in medium-carbon sulfur-containing blooms.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Lidong Xing, Chao Gu, Ziyu Lv, Yanping Bao
Summary: The oxidation behavior and mechanism near the crack of bloom were investigated by conducting high-temperature oxidation experiments on prefabricated cracks. It was found that the interface oxide layer composed of Fe2SiO4 and FeCr2O4 can prevent the oxidation of the steel matrix. However, as the temperature increases, the interface oxide layer enters a metastable state, leading to the rapid increase in thickness of the internal oxidation spot layer in the steel matrix.
Article
Metallurgy & Metallurgical Engineering
Lidong Xing, Zefeng Zhang, Lihua Zhao, Yanping Bao
Summary: This article investigates the effect of sulfur content on the surface cracks of medium carbon steel. It reveals that sulfur-containing steel has more network cracks and a high proportion of proeutectoid ferrite near the cracks, which increases the crack sensitivity.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Lidong Xing, Zefeng Zhang, Yanping Bao
Summary: This study investigates the effect of sulfur content on the crack susceptibility or hot ductility of medium carbon alloy steel. The results show that sulfur content significantly affects the flow stress-strain curve, hot ductility, fracture morphology, and inclusions of the steel.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Metallurgy & Metallurgical Engineering
Fang Gao, Yan-ping Bao, Min Wang, Da-zhi Wang, Li-dong Xing, Chao Gu
Summary: This study quantitatively describes the migration and distribution of phosphorus in the smelting process, explores the influence of slag components and temperature on the dephosphorization capacity, explains the advantages of the slag-forming route with higher FeO content, and proposes a novel blowing control mode. The industrial tests demonstrate that the optimized smelting mode significantly reduces cost and improves efficiency.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Dazhi Wang, Yanping Bao, Fang Gao, Lidong Xing
Summary: A hybrid model is developed in this paper to predict the oxygen consumption in the converter during steelmaking process. The model combines mechanism model and statistical model to improve the prediction accuracy.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Lidong Xing, Yanping Bao, Min Wang, Jianhong Yang
Summary: By utilizing industrial CT equipment, the three-dimensional morphology, spatial distribution, and two-dimensional distribution of surface cracks in SAE1548 were thoroughly investigated. The analysis of the microstructure and inclusions around the cracks revealed that they originated from the mold and propagated along the austenite grain boundary due to the existence of large-size inclusions. Furthermore, the temperature range and cooling processes significantly influenced the formation of cracks.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Chemistry, Physical
Jianhua Chu, Qiyao Yu, Kun Han, Lidong Xing, Chao Gu, Ying Li, Yanping Bao, Wei (Alex) Wang
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Chemistry, Physical
Jianhua Chu, Wei (Alex) Wang, Qiyao Yu, Cheng-Yen Lao, Lin Zhang, Kai Xi, Kun Han, Lidong Xing, Lei Song, Min Wang, Yanping Bao
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Chemistry, Physical
Lidong Xing, Qiyao Yu, Yanping Bao, Jianhua Chu, Kun Han, Shaokun Chong, Cheng-Yen Lao, Feili Lai, Ping Li, Kai Xi, Wei (Alex) Wang
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
Article
Chemistry, Physical
Lidong Xing, Qiyao Yu, Bo Jiang, Jianhua Chu, Cheng-Yen Lao, Min Wang, Kun Han, Zhiwei Liu, Yanping Bao, Wei (Alex) Wang
JOURNAL OF MATERIALS CHEMISTRY A
(2019)
