steel research international最新文献_第10页

New Insights on the Corrosion Behavior of a Cr–W–V–Mo-Rich Stainless Steel Containing Cr7C3–Cr23C6 Core–Shell Carbides: A Comparative Study 对含有 Cr7C3-Cr23C6 核壳碳化物的 Cr-W-V-Mo-Rich 不锈钢腐蚀行为的新认识：比较研究

IF 1.9 3区材料科学

steel research international Pub Date : 2024-08-01 DOI: 10.1002/srin.202400233

Majdouline Maher, Itziar Iraola-Arregui, Mohammed Lasri, Rachid Idouhli, Hicham Ben Youcef, Benaissa Rhouta, Vera Trabadelo

{"title":"New Insights on the Corrosion Behavior of a Cr–W–V–Mo-Rich Stainless Steel Containing Cr7C3–Cr23C6 Core–Shell Carbides: A Comparative Study","authors":"Majdouline Maher, Itziar Iraola-Arregui, Mohammed Lasri, Rachid Idouhli, Hicham Ben Youcef, Benaissa Rhouta, Vera Trabadelo","doi":"10.1002/srin.202400233","DOIUrl":"10.1002/srin.202400233","url":null,"abstract":"\u0000The goal of this study is to provide new insights into the corrosion mechanism of core-shell carbides containing steels. The corrosion behavior of two heat-treated Cr–W–V–Mo-rich stainless steels is evaluated using electrochemical techniques. The studied steels have different carbides microstructure, the first has core–shell carbides (Cr7C3–Cr23C6) in a ferritic matrix, while the second has conventional Cr23C6 carbides in a duplex matrix. The open-circuit potential results show a nobler behavior of the duplex sample; it is noticed in the potentiodynamic polarization curves where the core–shell carbides containing steel have an oxidation peak at −0.37 V versus saturated calomel electrode with a current density of 0.19 mA cm−2, contrary to the duplex steel that shows a passive behavior. Electrochemical impedance spectroscopy demonstrates the presence of two degradation mechanisms in the core–shell carbide steel, while the other steel is governed by charge transfer only. These findings are supported by scanning electron microscopy examination that shows the preferential corrosion of the shell while the core and the duplex matrix are kept intact. The passive film stability is evaluated using Mott–Schottky analysis and it shows the presence of a higher defect density on the passive film of the core–shell carbides containing steel.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141886348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction Model for Grain Growth During Austenitization Process of 1800 MPa Ultrahigh Strength Steel 1800 兆帕超高强度钢奥氏体化过程中晶粒长大的预测模型

IF 1.9 3区材料科学

steel research international Pub Date : 2024-08-01 DOI: 10.1002/srin.202400221

Shuang Liu, Fan Yang, Jun Peng, Fang Zhang, Yongbin Wang, Hongtao Chang, Shengli An

{"title":"Prediction Model for Grain Growth During Austenitization Process of 1800 MPa Ultrahigh Strength Steel","authors":"Shuang Liu, Fan Yang, Jun Peng, Fang Zhang, Yongbin Wang, Hongtao Chang, Shengli An","doi":"10.1002/srin.202400221","DOIUrl":"10.1002/srin.202400221","url":null,"abstract":"\u0000This article focuses on the influences of austenitizing temperature and holding time on the grain sizes of 1800 MPa ultrahigh strength steel (UHS-1800). When the austenitizing temperature increases from 900 to 990 °C and the holding time is 5 min, the austenite grain size increases from 12.60 to 20.88 μm. When the austenitizing temperature is 930 °C and the holding time increases from 3 to 9 min, the grain size increases from 13.52 to 17.22 μm. When the austenitizing temperature increases from 900 to 990 °C and the holding time is 5 min, the radiuses of the second-phase particles increase from 15.23 to 25.36 nm. When the austenitizing temperature is 930 °C and the holding time increases from 3 to 9 min, the radius of the second-phase particle increases from 15.72 to 20.50 nm. On this basis, a prediction model for austenite grain growth suitable for UHS-1800 hot stamping process is proposed. The growth model of the austenite grain can accurately predict the grain growth behavior during the hot stamping process, with a maximum error of 5.35% compared to experiments.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141886347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Influence of Particle Swarm Optimization-Back Propagation Neural Network Hyperparameter Selection on the Prediction Accuracy of Converter Endpoint Temperature 粒子群优化-反向传播神经网络超参数选择对变流器端点温度预测精度的影响

IF 1.9 3区材料科学

steel research international Pub Date : 2024-07-31 DOI: 10.1002/srin.202400329

Tongze Xin, Min Wang, Yihong Li

{"title":"The Influence of Particle Swarm Optimization-Back Propagation Neural Network Hyperparameter Selection on the Prediction Accuracy of Converter Endpoint Temperature","authors":"Tongze Xin, Min Wang, Yihong Li","doi":"10.1002/srin.202400329","DOIUrl":"10.1002/srin.202400329","url":null,"abstract":"The converter is a complex, high temperature, high pressure reactor with limited internal moitoring. At present, data-driven models mainly focus on the prediction differences between algorithms, and there is relatively little analysis of the impact of different hyperparameters on prediction accuracy. Taking a 120 t converter in a Chinese steel plant as an example, this paper explores the application of particle swarm optimization-back propagation neural network (PSO-BP) in converter temperature prediction. First, the Pauta criterion or Box plot method was used to preprocess the data by prescreening. Subsequently, the influence of the activation function, learning rate, and number of hidden layer nodes of BP on the prediction accuracy of the endpoint temperature were explored. Then we investigated the influence of PSO parameters on the optimal result of BP initial value. Comparing the temperature prediction hit rate before and after optimization, the BP model has hit rates of 63.64%, 79.22%, and 87.45% within ±10, ±15, and ±20 °C, respectively, and the PSO-BP model has hit rates of 68.40%, 84.85%, and 94.81%, respectively. In comparison, PSO-BP extracts data features more accurately, has higher stability, and has better accuracy in predicting the endpoint temperature of the converter.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141871465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contents: steel research int. 8/2024 内容：国际钢铁研究协会8/2024

IF 1.9 3区材料科学

steel research international Pub Date : 2024-07-31 DOI: 10.1002/srin.202470083

引用次数: 0

Impact of Permanent Magnet Stirring on Inclusion Evolution, Solidification Structure and Mechanical Properties of AH32 Shipbuilding Steel 永磁搅拌对 AH32 造船钢的夹杂物演化、凝固结构和力学性能的影响

IF 1.9 3区材料科学

steel research international Pub Date : 2024-07-31 DOI: 10.1002/srin.202400154

Xiangwei Liao, Ji Yang, Duo Wu, Chunlin Peng, Xiaolei Zhu, Jianfei Peng, Jie Zeng

{"title":"Impact of Permanent Magnet Stirring on Inclusion Evolution, Solidification Structure and Mechanical Properties of AH32 Shipbuilding Steel","authors":"Xiangwei Liao, Ji Yang, Duo Wu, Chunlin Peng, Xiaolei Zhu, Jianfei Peng, Jie Zeng","doi":"10.1002/srin.202400154","DOIUrl":"10.1002/srin.202400154","url":null,"abstract":"An experimental investigation has been conducted with respect to the effect of permanent magnet stirring (PMS) under different rotation speeds (0, 60, 180 rpm) on the solidification of AH32 shipbuilding steel by analyzing the inclusion evolution, solidification structure, and mechanical properties. As the rotation speed increased from 0 to 180 rpm, the mean size of inclusions (Al2O3, MnS, and Al2O3–MnS) reduced significantly from 6.23 to 2.92 μm, their number increased from 49 to 82 n mm−2 and the ratio of complex inclusions increased from 30.6% to 75.6% in the AH32 steel ingot. Besides, the increasing number of small complex inclusion promotes the formation of acicular ferrite in steel, resulting in an elevation of the area ratio from 10.5% to 27.8%. Furthermore, under a rotation speed of 180 rpm, the mean grain size decreased to 99.4 μm and the frequency of high-angle grain boundaries (HAGBs) increased to 86.1%. In addition, the as-cast AH32 steel exhibited an optimized ultimate tensile strength of 532.0 MPa and an improved elongation of 24.2% after an enhanced PMS, which was attributed to more acicular ferrite, higher HAGBs ratio, and refined grain size.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141871467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of Vortex Slag Entrainment during Ladle Teeming Process in the Continuous Casting of Automobile Outer Panel 汽车外板连铸中钢包浇注过程中涡流夹渣的优化设计

IF 1.9 3区材料科学

steel research international Pub Date : 2024-07-29 DOI: 10.1002/srin.202400322

Haichen Zhou, Haibo Li, Xiaoxuan Deng, Baisong Liu, Chenxi Ji, Bin Chen, Chong Wang, Changliang Zhao

{"title":"Optimization of Vortex Slag Entrainment during Ladle Teeming Process in the Continuous Casting of Automobile Outer Panel","authors":"Haichen Zhou, Haibo Li, Xiaoxuan Deng, Baisong Liu, Chenxi Ji, Bin Chen, Chong Wang, Changliang Zhao","doi":"10.1002/srin.202400322","DOIUrl":"10.1002/srin.202400322","url":null,"abstract":"\u0000With the thinner of the automobile panel, the press crack defects caused by the large-size calcium aluminate inclusions at the automakers become obvious. Herein, in order to stabilize the control of calcium aluminate inclusions in the molten steel, the vortex slag entrainment (VSE) of a 300 ton ladle is investigated by the numerical simulation. The effects of the steel throughput, cofferdam height close to the nozzle, and ladle bottom structure on the VSE are analyzed. Results demonstrate that the residual molten steel (RMS) in the ladle and the critical height of the vortex increase with the increasing of the steel throughput. The RMS increases with the increasing of the cofferdam height when the VSE occurs. When the cofferdam height is 50, 100, and 150 mm, the RMS are 4.71, 7.19, and 9.62 t at the initial time of the VSE with a 7.5 ton min−1 steel throughput. In addition, the industrial trial of transforming the flat bottom ladle into the slope bottom ladle is carried out to control the VSE and reduce the RMS. The average weight of the RMS after pouring 25 heats of the slope ladle bottom ladle is 1.85 t less than that of the flat bottom ladle.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141871731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Observation of Initial Interfacial Reaction between High Aluminum Molten Steel and CaO–Al2O3 Inclusion at 1873 K Using Laser Confocal Scanning Microscopy and Micro‐Computerized Tomography 利用激光共聚焦扫描显微镜和微型计算机断层成像技术观察 1873 K 时高铝熔融钢与 CaO-Al2O3 包裹体之间的初始界面反应

IF 2.2 3区材料科学

steel research international Pub Date : 2024-07-29 DOI: 10.1002/srin.202300803

Weijian Wang, Yuan Gao, Ying Ren, Lifeng Zhang

{"title":"Observation of Initial Interfacial Reaction between High Aluminum Molten Steel and CaO–Al2O3 Inclusion at 1873 K Using Laser Confocal Scanning Microscopy and Micro‐Computerized Tomography","authors":"Weijian Wang, Yuan Gao, Ying Ren, Lifeng Zhang","doi":"10.1002/srin.202300803","DOIUrl":"https://doi.org/10.1002/srin.202300803","url":null,"abstract":"A new method is proposed to investigate the transient reaction between the CaO–Al2O3 inclusion from slag entrainment and the high aluminum molten steel. The confocal laser scanning microscopy, the X‐ray computerized tomography technology, and the scanning electron microscope‐energy dispersive spectrometer are combined to observe the variation of the size, shape, and composition of the entrained slag inclusion with time. The CaO in the inclusion is reduced by the dissolved aluminum in the molten steel. With the increase of the dissolved aluminum content from 0.02 to 5.73 wt%, the CaO in inclusions under equilibrium state decreased from 55 to 35 wt%. The reaction between the dissolved aluminum in the steel and the CaO in the calcium aluminate inclusion at 1873 K is discussed through thermodynamic and kinetic calculations, which are consistent with experimental results. It is indicated that the mass transfer coefficient of the CaO in the inclusion is 2.95 × 10−5 m s−1.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141871466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Harmful Effects, Origin, and Control of Banded Structures in Electroplated Fasteners of High-Carbon Steel 高碳钢电镀紧固件带状结构的有害影响、起源和控制

IF 1.9 3区材料科学

steel research international Pub Date : 2024-07-29 DOI: 10.1002/srin.202400112

Tao Zhang, Hu Long, Guoguang Cheng, Junyu Guo, Zhongyu Lei, Zhongzhong Xun

{"title":"Harmful Effects, Origin, and Control of Banded Structures in Electroplated Fasteners of High-Carbon Steel","authors":"Tao Zhang, Hu Long, Guoguang Cheng, Junyu Guo, Zhongyu Lei, Zhongzhong Xun","doi":"10.1002/srin.202400112","DOIUrl":"10.1002/srin.202400112","url":null,"abstract":"In this study, the harmful effects of a banded structure on the bending fracture of electroplated fasteners are investigated. The origins and ways to control these structures are also explored. The fracture surfaces of the fasteners exhibit stepwise cracks and numerous intergranular facets associated with ductile tearing, which is a characteristic of hydrogen embrittlement. The origin of these stepwise cracks can be traced to the internal banded structures. Therefore, the internal banded structures promote fracturing during the bending test. The internal banded structures in the fasteners can be traced back to the internal cracks in the bloom, and inappropriate soft-reduction processes lead to internal cracks. Notably, the carbon segregation at the internal cracks is severe. This is attributed to the proximity of the internal cracks to the center of the bloom, causing the enriched liquid in the interdendritic region to be sucked into these internal cracks. The optimal reduction position and amount are determined by employing heat-transfer and soft-reduction models. Fluctuations in superheat and casting speed significantly influence this optimal position and reduction amount.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141871727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanisms of Strengthening and Fracture in 17%Cr Martensite/Ferrite Dual-Phase Stainless Steels 17%Cr 马氏体/铁素体双相不锈钢的强化和断裂机制

IF 1.9 3区材料科学

steel research international Pub Date : 2024-07-29 DOI: 10.1002/srin.202400217

Ming-Tao Wang, Yong-Bo Liu, Xu Zhai, Nian-Wang Li, Jian-Feng Jin, Yong-Chao Yang, Yan-Zhong Tian

{"title":"Mechanisms of Strengthening and Fracture in 17%Cr Martensite/Ferrite Dual-Phase Stainless Steels","authors":"Ming-Tao Wang, Yong-Bo Liu, Xu Zhai, Nian-Wang Li, Jian-Feng Jin, Yong-Chao Yang, Yan-Zhong Tian","doi":"10.1002/srin.202400217","DOIUrl":"10.1002/srin.202400217","url":null,"abstract":"To clarify the strengthening mechanisms of medium-chromium stainless steels (SSs) with carbides, ferrite, and martensite, 17%Cr SSs with varying martensite contents have been prepared, and the influence of martensite on microstructure, mechanical properties, and fracture has been investigated. According to THERMOCALC calculations, 17%Cr SS undergo a reversible phase transition between austenite and ferrite + M23C6 through the diffusion of carbon in austenite and M23C6 in the temperature range of 850–1220 °C. As the martensite content increases, M23C6 decreases, the martensite grain size increases, and the ferrite grain size initially increases and then decreases. Meanwhile, the yield strength and ultimate tensile strength increase, while both the uniform and post-uniform elongation decrease. It is also found a decrease in work-hardening index and an increase in work-hardening rate with increasing martensite content. Under tensile loading, three types of voids are present in 17%Cr SS: type A only in the grain boundary (GB) area with M23C6 in martensite-free material and type B and C in ferrite grains close to martensite grains and at ferrite/martensite GBs, respectively. An increase in martensite content leads to more voids, indicating a reduction in material plasticity caused by martensite.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141871468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Titanium-Dependent Kinetics of Ferrite Single-Phase Recrystallization in Cold-Rolled Ultra-High-Strength Low-Alloy Steels During Annealing 冷轧超高强度低合金钢退火过程中铁素体单相再结晶的钛依赖动力学

IF 1.9 3区材料科学

steel research international Pub Date : 2024-07-29 DOI: 10.1002/srin.202300905

Sang Hun Shin, Jong Myeong Kim, Alexander Gramlich, Kwang Su Na

引用次数: 0