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Investigation of Basicity on Compressive Strength and Oxidation Induration Mechanism of Vanadium–Titanium Magnetite Pellets 碱度对钒钛磁铁矿球团抗压强度和氧化硬化机理的影响研究
IF 2.2 3区 材料科学
steel research international Pub Date : 2024-08-05 DOI: 10.1002/srin.202400461
Song Zhang, Yanbing Zong, Yun Huang, Xiangyou Gui, Dian Lei, Jianliang Zhang, Xian Gan, Zhenyang Wang, Shushi Zhang, Peiyuan Lu
{"title":"Investigation of Basicity on Compressive Strength and Oxidation Induration Mechanism of Vanadium–Titanium Magnetite Pellets","authors":"Song Zhang, Yanbing Zong, Yun Huang, Xiangyou Gui, Dian Lei, Jianliang Zhang, Xian Gan, Zhenyang Wang, Shushi Zhang, Peiyuan Lu","doi":"10.1002/srin.202400461","DOIUrl":"https://doi.org/10.1002/srin.202400461","url":null,"abstract":"Currently, the typical charge structure for blast furnace smelting of vanadium–titanium magnetite (VTM) is the addition of acidic pellets, high‐basicity sinters, and lumps. To increase the percentage of pellets entering the blast furnace, it is necessary to transfer the basicity burden to the pellets. In this study, the effect of basicity on the phase transition and oxidation hardening mechanism of VTM pellets is investigated. In the results, it is indicated that when the preheating temperature is 950 °C, the preheating time is 15 min, the roasting temperature is 1260 °C, and the roasting time is 15 min, with the basicity (CaO/SiO<jats:sub>2</jats:sub>) increasing from 0.08 to 1.3, the compressive strength of pellets shows a trend of “increasing first and then decreasing,” with the highest value reaching 3159 N pellet<jats:sup>−1</jats:sup> at basicity of 0.5. As the basicity increases, calcium ferrate can be generated by CaO in the liquid phase with Fe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> in addition to silicate with SiO<jats:sub>2</jats:sub>, which will increase the amount of the liquid phase. With the increase of basicity, the oxide‐bonded induration is gradually weakened, and the slag‐bonded induration is gradually enhanced. A moderate amount of liquid phase can play the role of bonding and filling, thereby improving compressive strength.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934332","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
Experimental Study on the Characteristics and High‐Temperature Heat Transfer of Secondary Cooling Nozzle for High‐Efficiency Slab Continuous Casting Process 高效板坯连铸工艺二次冷却喷嘴的特性和高温传热实验研究
IF 2.2 3区 材料科学
steel research international Pub Date : 2024-08-05 DOI: 10.1002/srin.202400357
Jia‐kun Li, Rong‐jun Xu, Ming Lv, Xiong‐bo Sun, Qi Gao, Zhong‐ze Du, Zhao‐hui Zhang
{"title":"Experimental Study on the Characteristics and High‐Temperature Heat Transfer of Secondary Cooling Nozzle for High‐Efficiency Slab Continuous Casting Process","authors":"Jia‐kun Li, Rong‐jun Xu, Ming Lv, Xiong‐bo Sun, Qi Gao, Zhong‐ze Du, Zhao‐hui Zhang","doi":"10.1002/srin.202400357","DOIUrl":"https://doi.org/10.1002/srin.202400357","url":null,"abstract":"In the continuous casting process, the heat transfer effect of secondary cooling plays an important role in the quality of the slab. The cooling intensity and cooling uniformity of the secondary cooling nozzle need more efficient spray cooling to achieve. Herein, the cold characteristics of different types of nozzles were compared. It is found that the second type of air mist nozzles have more uniform water density and striking force. On this basis, high‐temperature heat transfer experiments for casting billets were carried out to study the heat transfer coefficients of different air mist nozzles in the secondary cooling zone of continuous casting. It is found that the heat transfer coefficient increases as the distance of the temperature measurement point from the nozzle directly below increases. The heat transfer coefficients of the casting billet in both the jet and non‐jet zones are decreasing to varying degrees. When the temperature drops to 600 °C, the second type of air mist nozzle shows a faster temperature drop at the point of measurement, a smaller difference in time taken for temperature drop between jet and non‐jet zones, and faster and more uniform spraying, leading to a more significant trend of increasing heat transfer coefficient.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934333","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
Analysis of the Influence of Additions of Flux, SiO2, and Al2O3, on the Desulfurization Efficiency of Hot Metal Using Global Desulfurization Factor 利用全局脱硫因子分析添加助熔剂、SiO2 和 Al2O3 对热金属脱硫效率的影响
IF 2.2 3区 材料科学
steel research international Pub Date : 2024-08-04 DOI: 10.1002/srin.202400214
Silas Gambarine Soares, Simão Vervloet Ramos, Thiago Barreto da Silva Amaral, Mateus Costa Corona, Raphael Mariano de Souza, Eduardo Junca, Jose Roberto de Oliveira
{"title":"Analysis of the Influence of Additions of Flux, SiO2, and Al2O3, on the Desulfurization Efficiency of Hot Metal Using Global Desulfurization Factor","authors":"Silas Gambarine Soares, Simão Vervloet Ramos, Thiago Barreto da Silva Amaral, Mateus Costa Corona, Raphael Mariano de Souza, Eduardo Junca, Jose Roberto de Oliveira","doi":"10.1002/srin.202400214","DOIUrl":"https://doi.org/10.1002/srin.202400214","url":null,"abstract":"The formation of the solid phases CaS, 3CaO.SiO<jats:sub>2</jats:sub> and CaO.Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> around the lime particle decreases the efficiency of desulfurization by the kanbara reactor (KR) process. The addition of fluxes reduces the formation of these phases. The addition of Al and Si can also have this effect, depending on the added levels. In this study, different mixtures based on CaO with different levels of fluorspar, sodalite (Nepheline Syenite), and SiO<jats:sub>2</jats:sub> and Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> content were studied and used in the desulfurization process of hot metal. These mixtures were added to a bath of liquid hot metal at 1400 °C. All experiments were performed with mechanical agitation. Samples were taken at times of 5, 10, 15, and 20 min, and analyses were performed to evaluate the variation of sulfur over time. The Thermo‐Calc software was used to determine the formed phases, solid fraction, and liquid fraction of the different mixtures. With this data, different values of the Global Desulfurization Factor (FG<jats:sub>DeS</jats:sub>) were calculated, which was developed to evaluate and predict the efficiency of hot metal desulfurizing mixtures by the KR process. The results of showed that fluorspar was more efficient than sodalite. The FG<jats:sub>DeS</jats:sub> had a correlation factor (R<jats:sup>2</jats:sup>) above 0.9 with the desulfurization efficiency.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934375","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
New Approach for Plasma Nitrocarburizing of Stainless Steels by a Modified Reactor Configuration Using a Plasma‐Activated Solid Carbon Precursor 利用等离子体活化固体碳前驱体的改良反应器配置对不锈钢进行等离子体渗氮的新方法
IF 2.2 3区 材料科学
steel research international Pub Date : 2024-08-04 DOI: 10.1002/srin.202400247
Saeed M. Jafarpour, Anke Dalke, Horst Biermann
{"title":"New Approach for Plasma Nitrocarburizing of Stainless Steels by a Modified Reactor Configuration Using a Plasma‐Activated Solid Carbon Precursor","authors":"Saeed M. Jafarpour, Anke Dalke, Horst Biermann","doi":"10.1002/srin.202400247","DOIUrl":"https://doi.org/10.1002/srin.202400247","url":null,"abstract":"Stainless steel surfaces can be modified using plasma‐assisted thermochemical treatments to improve properties like hardness, wear, and pitting corrosion resistance. To specifically adjust the desired properties, a precise control of the produced treatment‐relevant gas species with regard to their type and concentration is essential. This requires the adjustment of the parameters for the generation of the gas species, being independent from heating parameters, as well as their real‐time measurement. Therefore, this study presents the use of a plasma‐activated solid carbon precursor in a cold‐wall reactor using active screen technology and in a modified hot‐wall reactor during plasma nitrocarburizing of austenitic stainless steel. In addition, the modified hot‐wall reactor combined with a compact laser‐based absorption spectroscopy sensor for real‐time monitoring and concentration evaluation of in‐site generated gas species. It is shown that implementing a plasma‐activated solid carbon precursor in a modified hot‐wall reactor enables adjustable generation of C‐containing gas species, particularly HCN, with high production yield by an independent power management. Therefore, HCN is produced independent from heating while the limitations arising during active screen technology using a carbon screen are avoided. The presented technological development thus opens up new possibilities for better control of the plasma nitrocarburizing treatments of steels.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934378","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
Oxidation Behavior of MgO‐C Refractories Containing Metallic Aluminum, Calcium Magnesium Aluminate Aggregates, and Carbores P 含金属铝、铝酸钙镁骨料和碳酸钙的氧化镁-C 耐火材料的氧化行为 P
IF 2.2 3区 材料科学
steel research international Pub Date : 2024-08-04 DOI: 10.1002/srin.202400260
Anton Yehorov, Xingwen Wei, Sofia Mazepa, Anastasiia Sherstneva, Olena Volkova
{"title":"Oxidation Behavior of MgO‐C Refractories Containing Metallic Aluminum, Calcium Magnesium Aluminate Aggregates, and Carbores P","authors":"Anton Yehorov, Xingwen Wei, Sofia Mazepa, Anastasiia Sherstneva, Olena Volkova","doi":"10.1002/srin.202400260","DOIUrl":"https://doi.org/10.1002/srin.202400260","url":null,"abstract":"The current investigation delves into the oxidation resistance of magnesia‐carbon‐bonded (MgO‐C) refractory enhanced with calcium magnesium aluminate (CMA) cement, metallic aluminum, and Carbores P across a broad temperature spectrum from 800 to 1600 °C. The results demonstrate that the modification with CMA up to a temperature threshold of 1200 °C does not compromise the material's inherent oxidation resistance. However, above this temperature, a decrement in oxidation resistance is observed. The impact of grain size variation in CMA on the oxidation resistance of MgO‐C refractories is notable, and the finer grains show a superior performance. MgO‐C sample with Carbores P has excellent oxidation resistance up to 1000 °C, while above 1200 °C, its oxidation resistance strongly deteriorates. The metallic aluminum addition exhibits a remarkable oxidation resistance throughout the evaluated temperature range, indicated by a slight oxidation.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141968784","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
Crystallization Behavior of the CaO–SiO2–Al2O3–MgO System Inclusions CaO-SiO2-Al2O3-MgO 系统包裹体的结晶行为
IF 2.2 3区 材料科学
steel research international Pub Date : 2024-08-04 DOI: 10.1002/srin.202400253
Yong Wang, Sohei Sukenaga, Masanori Tashiro, Hua Zhang, Hongwei Ni, Hiroyuki Shibata
{"title":"Crystallization Behavior of the CaO–SiO2–Al2O3–MgO System Inclusions","authors":"Yong Wang, Sohei Sukenaga, Masanori Tashiro, Hua Zhang, Hongwei Ni, Hiroyuki Shibata","doi":"10.1002/srin.202400253","DOIUrl":"https://doi.org/10.1002/srin.202400253","url":null,"abstract":"The crystallization process of low melting point CaO–SiO<jats:sub>2</jats:sub>–Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>–MgO system inclusions during the continuous casting and hot rolling process greatly affects the deformability of inclusions. The effect of Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> and MgO contents on the crystallization characteristics of CaO–SiO<jats:sub>2</jats:sub>–Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>–MgO system melts representing the typical oxide inclusions in Si–Mn deoxidized steels is systematically investigated. The continuous cooling transformation and time–temperature transformation experiments are carried out. The results reveal that the increase of Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> contents restrains the crystallization process of the melt, whereas the crystallization tendency of the melt is promoted with the increase of MgO contents. The precipitated phases are predominately 2CaO·MgO·2SiO<jats:sub>2</jats:sub> and 3CaO·MgO·2SiO<jats:sub>2</jats:sub>, and the primary crystalline phase is unaffected by the changes of Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> and MgO contents. To obtain low melting point plasticized inclusions with limited crystallization ability, it is recommended to control the Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> and MgO contents greater than 15 wt% and below 5 wt%, respectively. The isothermal treatment is suggested to be controlled within a proper temperature range (1175–1250 °C) to decrease the crystallization kinetics. The oxide system's viscosity change is the limiting kinetic factor in the crystallization process, and it can be utilized to predict the system's crystallization tendency.","PeriodicalId":21929,"journal":{"name":"steel research international","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141968785","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
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 2.2 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":"https://doi.org/10.1002/srin.202400233","url":null,"abstract":"The 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 (Cr<jats:sub>7</jats:sub>C<jats:sub>3</jats:sub>–Cr<jats:sub>23</jats:sub>C<jats:sub>6</jats:sub>) in a ferritic matrix, while the second has conventional Cr<jats:sub>23</jats:sub>C<jats:sub>6</jats:sub> 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<jats:sup>−2</jats:sup>, 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":2.2,"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 2.2 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":"https://doi.org/10.1002/srin.202400221","url":null,"abstract":"This 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":2.2,"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 2.2 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":"https://doi.org/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":2.2,"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
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 2.2 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":"https://doi.org/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 (Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>, MnS, and Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>–MnS) reduced significantly from 6.23 to 2.92 μm, their number increased from 49 to 82 n mm<jats:sup>−2</jats:sup> 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":2.2,"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
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