Pub Date : 2023-02-19DOI: 10.1080/03019233.2023.2169222
İ. Karaağaç, M. Kabakçı, Zübeyde Başdoğan
ABSTRACT In this study, the effects of local heat treatment using a low-power laser on the bending formability of DP800 sheet material were experimentally investigated. In the first step of the study, only the punch contact bending region of sheet metal was locally heated with a constant feed rate (1 mm s−1) and at different laser powers (50, 75, and 100% Watt). In the next step, the sheet material was transferred to the bending die for bending without any cooling process, and into the last stage, the sheet material was formed in different angled V-bending dies (30°, 60°, and 90°). It was observed that in heating up to 75-W power, the hardness decreased to 237 HV due to the dissolution of the martensite in the microstructure of DP material, and the springback value decreased by 39.285% due to the decrease in hardness.
摘要本研究通过实验研究了低功率激光局部热处理对DP800板材弯曲成形性能的影响。在研究的第一步中，在不同的激光功率(50、75和100%瓦特)下，以恒定的进给速率(1 mm s−1)对金属板的冲压接触弯曲区域进行局部加热。下一步，将板料不经任何冷却工序转移到弯曲模进行弯曲，进入最后一步，将板料在不同角度的v型弯曲模(30°、60°和90°)上成形。结果表明，当加热功率达到75-W时，由于马氏体在DP材料显微组织中的溶解，硬度下降到237 HV，回弹值下降了39.285%。
{"title":"The effects of laser-assisted heat treatment on warm formability of dual-phase materials","authors":"İ. Karaağaç, M. Kabakçı, Zübeyde Başdoğan","doi":"10.1080/03019233.2023.2169222","DOIUrl":"https://doi.org/10.1080/03019233.2023.2169222","url":null,"abstract":"ABSTRACT In this study, the effects of local heat treatment using a low-power laser on the bending formability of DP800 sheet material were experimentally investigated. In the first step of the study, only the punch contact bending region of sheet metal was locally heated with a constant feed rate (1 mm s−1) and at different laser powers (50, 75, and 100% Watt). In the next step, the sheet material was transferred to the bending die for bending without any cooling process, and into the last stage, the sheet material was formed in different angled V-bending dies (30°, 60°, and 90°). It was observed that in heating up to 75-W power, the hardness decreased to 237 HV due to the dissolution of the martensite in the microstructure of DP material, and the springback value decreased by 39.285% due to the decrease in hardness.","PeriodicalId":14753,"journal":{"name":"Ironmaking & Steelmaking","volume":"50 1","pages":"984 - 990"},"PeriodicalIF":2.1,"publicationDate":"2023-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48612960","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}
Pub Date : 2023-02-11DOI: 10.1080/03019233.2022.2150804
Kan Yu, Y. Zhang, Shuai Zhang, M. Gao, Cheng Zhou
ABSTRACT The influence of Al2O3/TiO2/Na2O component in steelmaking slag on the corrosion rate and mechanism of MgO refractories is significant for promoting the development of non-fluorine fluxes in steelmaking processes. In this study, static method was used to analyze the effects of Al2O3/TiO2/Na2O components on the corrosion rate of MgO refractory, which was characterized by measuring the MgO content in the final slag after the same reaction time. The results showed the corrosion rate of the MgO refractory was controlled by the diffusion of FetO in the slag to the crucible and the chemical reaction of MgO with FetO. When the amount of each oxide was less than 15%, the ability of the slags to corrode the MgO refractory material were as follows: Na2O
{"title":"Effect of Al2O3/TiO2/Na2O component in steelmaking slag on the corrosion of MgO refractories","authors":"Kan Yu, Y. Zhang, Shuai Zhang, M. Gao, Cheng Zhou","doi":"10.1080/03019233.2022.2150804","DOIUrl":"https://doi.org/10.1080/03019233.2022.2150804","url":null,"abstract":"ABSTRACT The influence of Al2O3/TiO2/Na2O component in steelmaking slag on the corrosion rate and mechanism of MgO refractories is significant for promoting the development of non-fluorine fluxes in steelmaking processes. In this study, static method was used to analyze the effects of Al2O3/TiO2/Na2O components on the corrosion rate of MgO refractory, which was characterized by measuring the MgO content in the final slag after the same reaction time. The results showed the corrosion rate of the MgO refractory was controlled by the diffusion of FetO in the slag to the crucible and the chemical reaction of MgO with FetO. When the amount of each oxide was less than 15%, the ability of the slags to corrode the MgO refractory material were as follows: Na2O","PeriodicalId":14753,"journal":{"name":"Ironmaking & Steelmaking","volume":"50 1","pages":"648 - 657"},"PeriodicalIF":2.1,"publicationDate":"2023-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43938702","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}
Pub Date : 2023-02-05DOI: 10.1080/03019233.2023.2169486
Yanjiao Gao, Ran Liu, Chen-chen Lan, Shujun Chen, Yan Wang, Guangshi Yan, Qing Lyu
ABSTRACT The sulphide capacities of CaO-SiO2-Al2O3-MgO-TiO2-FetO slags with high titanium and FetO were measured by gas-slag equilibration technique to reveal the effect of slag composition and temperature on the sulphide capacities of slags. The results showed that sulphide capacities enhanced with the increase of temperature, basicity, FetO, and MgO contents, TiO2 content increased first and then decreased in the range of 10 wt-% to 20 wt-%; the influence became negligible as the TiO2 content exceeded 25 wt-%. MgO significantly increased the sulphide capacities of slag in the range of 6 wt-% to 8 wt-%, continued to increase the MgO content, and the increasing trend of Log CS became slowly; FetO content increased from 3 wt-% to 9 wt-%, sulphide capacities increased slowly, increased dramatically in the range of 9 wt-% to 15 wt-%. Meanwhile, comparing the optical basicity models found Zhang and Tsao’s models are close to the experimentally determined values.
{"title":"Sulphide capacity of CaO-SiO2-Al2O3-MgO-TiO2-FetO slag with high titanium and high FeO content based on HIsmelt process","authors":"Yanjiao Gao, Ran Liu, Chen-chen Lan, Shujun Chen, Yan Wang, Guangshi Yan, Qing Lyu","doi":"10.1080/03019233.2023.2169486","DOIUrl":"https://doi.org/10.1080/03019233.2023.2169486","url":null,"abstract":"ABSTRACT The sulphide capacities of CaO-SiO2-Al2O3-MgO-TiO2-FetO slags with high titanium and FetO were measured by gas-slag equilibration technique to reveal the effect of slag composition and temperature on the sulphide capacities of slags. The results showed that sulphide capacities enhanced with the increase of temperature, basicity, FetO, and MgO contents, TiO2 content increased first and then decreased in the range of 10 wt-% to 20 wt-%; the influence became negligible as the TiO2 content exceeded 25 wt-%. MgO significantly increased the sulphide capacities of slag in the range of 6 wt-% to 8 wt-%, continued to increase the MgO content, and the increasing trend of Log CS became slowly; FetO content increased from 3 wt-% to 9 wt-%, sulphide capacities increased slowly, increased dramatically in the range of 9 wt-% to 15 wt-%. Meanwhile, comparing the optical basicity models found Zhang and Tsao’s models are close to the experimentally determined values.","PeriodicalId":14753,"journal":{"name":"Ironmaking & Steelmaking","volume":"50 1","pages":"991 - 998"},"PeriodicalIF":2.1,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46005403","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}
Pub Date : 2023-02-05DOI: 10.1080/03019233.2023.2165520
W. Jiang, Liang Tian, S. Hao, He Bo, Tengfei Ma
ABSTRACT Aiming at the shortcomings of traditional slag use of height to represent melting temperature, the melting performance of desulfurization slag under different binary alkalinity is tested, and any time image in the melting process is binarized to obtain the realtime area of slag heating and melting process.The area change rate is obtained from the real-time area and the initial area, and the melting performance of the slag is evaluated by the area change rate. The results show that using the change of the whole area of the slag instead of the change of the height to evaluate the melting performance of the slag can comprehensively evaluate the melting process of the slag, which not only improves the accuracy and universality of the evaluation of the melting performance of the slag but also shows the change rule of the low-temperature slag expansion process.
{"title":"A new method for evaluating the melting performance of the slag","authors":"W. Jiang, Liang Tian, S. Hao, He Bo, Tengfei Ma","doi":"10.1080/03019233.2023.2165520","DOIUrl":"https://doi.org/10.1080/03019233.2023.2165520","url":null,"abstract":"ABSTRACT Aiming at the shortcomings of traditional slag use of height to represent melting temperature, the melting performance of desulfurization slag under different binary alkalinity is tested, and any time image in the melting process is binarized to obtain the realtime area of slag heating and melting process.The area change rate is obtained from the real-time area and the initial area, and the melting performance of the slag is evaluated by the area change rate. The results show that using the change of the whole area of the slag instead of the change of the height to evaluate the melting performance of the slag can comprehensively evaluate the melting process of the slag, which not only improves the accuracy and universality of the evaluation of the melting performance of the slag but also shows the change rule of the low-temperature slag expansion process.","PeriodicalId":14753,"journal":{"name":"Ironmaking & Steelmaking","volume":"50 1","pages":"775 - 781"},"PeriodicalIF":2.1,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47393309","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}
Pub Date : 2023-02-05DOI: 10.1080/03019233.2022.2163532
C. Biswas, Arnab Swarnakar, A. Majumder
ABSTRACT Exploiting low-grade resources and raw material fines is a challenge for metallurgists developing new technologies. Iron-bearing and carbonaceous by-products are generated by ironmaking and steelmaking units and fed into the sinter plant. These by-products, which have varying proportions of ultra-fines, balling properties, moisture retention capacities, and so on, have a significant impact on sinter quality when used in sinter green mixtures. This study investigates the use of micro-fines and how it affects sinter quality while keeping operational factors such as moisture addition, balling index, and bed permeability in mind. In addition, the ideal moisture addition is investigated using higher micro-fines bearing dusts/sludges of various iron-bearing materials. The presence of columnar SFCA (Silico-ferrite of Calcium and Aluminium) is revealed by microscopic examination of the sinter produced with higher micro fines and good permeability, which improves the Reduction Degradation Index. It was also demonstrated that using more micro-fines in the blend and maintaining consistent moisture addition reduced the amount of return sinter produced.
{"title":"Utilization of micro-fines in sinter making and its implications on bed permeability and sinter quality","authors":"C. Biswas, Arnab Swarnakar, A. Majumder","doi":"10.1080/03019233.2022.2163532","DOIUrl":"https://doi.org/10.1080/03019233.2022.2163532","url":null,"abstract":"ABSTRACT Exploiting low-grade resources and raw material fines is a challenge for metallurgists developing new technologies. Iron-bearing and carbonaceous by-products are generated by ironmaking and steelmaking units and fed into the sinter plant. These by-products, which have varying proportions of ultra-fines, balling properties, moisture retention capacities, and so on, have a significant impact on sinter quality when used in sinter green mixtures. This study investigates the use of micro-fines and how it affects sinter quality while keeping operational factors such as moisture addition, balling index, and bed permeability in mind. In addition, the ideal moisture addition is investigated using higher micro-fines bearing dusts/sludges of various iron-bearing materials. The presence of columnar SFCA (Silico-ferrite of Calcium and Aluminium) is revealed by microscopic examination of the sinter produced with higher micro fines and good permeability, which improves the Reduction Degradation Index. It was also demonstrated that using more micro-fines in the blend and maintaining consistent moisture addition reduced the amount of return sinter produced.","PeriodicalId":14753,"journal":{"name":"Ironmaking & Steelmaking","volume":"50 1","pages":"734 - 743"},"PeriodicalIF":2.1,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45703280","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}
Pub Date : 2023-02-03DOI: 10.1080/03019233.2023.2168929
Song Liu, Zhen Zhang, Jun Zhao, Xiaojie Liu, Jiongming Zhang, Ran Liu, Fumin Li, Qing Lyu
ABSTRACT Stable production processes, high efficiency and good product quality are the main objectives of the sintering industry. Taking the whole sintering production process as the research object, cutting-edge intelligent algorithms and classical sintering theories are applied to establish a sintering batch optimization model, a sinter layer permeability prediction model, a sintering end point optimization control model and a sinter quality prediction and evaluation model respectively, supported by a large amount of historical data, so that the model has reasonably accurate results as well as strong practicality. At the same time, a sintering whole process intelligent manufacturing system based on the above four models is constructed using Java and Python programming languages. The system realizes the functions of real-time analysis of key parameters, intelligent early warning, decision optimization and fault tracing, which provides reasonable line optimization suggestions for field operators, and significantly improves the intelligence and production efficiency of sintering process. GRAPHICAL ABSTRACT
{"title":"Research and application of the sintering whole process intelligent manufacturing system","authors":"Song Liu, Zhen Zhang, Jun Zhao, Xiaojie Liu, Jiongming Zhang, Ran Liu, Fumin Li, Qing Lyu","doi":"10.1080/03019233.2023.2168929","DOIUrl":"https://doi.org/10.1080/03019233.2023.2168929","url":null,"abstract":"ABSTRACT Stable production processes, high efficiency and good product quality are the main objectives of the sintering industry. Taking the whole sintering production process as the research object, cutting-edge intelligent algorithms and classical sintering theories are applied to establish a sintering batch optimization model, a sinter layer permeability prediction model, a sintering end point optimization control model and a sinter quality prediction and evaluation model respectively, supported by a large amount of historical data, so that the model has reasonably accurate results as well as strong practicality. At the same time, a sintering whole process intelligent manufacturing system based on the above four models is constructed using Java and Python programming languages. The system realizes the functions of real-time analysis of key parameters, intelligent early warning, decision optimization and fault tracing, which provides reasonable line optimization suggestions for field operators, and significantly improves the intelligence and production efficiency of sintering process. GRAPHICAL ABSTRACT","PeriodicalId":14753,"journal":{"name":"Ironmaking & Steelmaking","volume":"50 1","pages":"969 - 983"},"PeriodicalIF":2.1,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49162635","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}
Pub Date : 2023-01-29DOI: 10.1080/03019233.2023.2166264
Xiaobao Ma, Baoxu Ma, Jiangjiang Li, P. Chen, Yongheng Peng, Z. Ren
ABSTRACT The cross-sectional profile of hot-rolled silicon steel strips has a great impact on the transverse thickness difference of cold-rolled strips. The genetic algorithm - Levenberg Marquardt - backpropagation neural network model was developed for the analysis of heredity effect of the cross-sectional profile of hot-rolled strip. The feature importance was analysed based on random forest and extreme gradient boosting methods. Furthermore, the influence law was analysed by data visualization. The coupling term of the strip crown and thickness , the edge drop and the coupling term of the strip wedge and thickness are recommended as key indexes of the hot-rolled silicon steel strip. As the transverse thickness difference must be controlled below 7 μm, the corresponding , , should be controlled no more than 60, between -10∼10 μm and no more than 7.5 , respectively. Meanwhile, the requirement for the cross-sectional profile indexes is synchronous.
{"title":"Effect of strip profile of hot-rolled silicon steel on transverse thickness difference of cold-rolled strip","authors":"Xiaobao Ma, Baoxu Ma, Jiangjiang Li, P. Chen, Yongheng Peng, Z. Ren","doi":"10.1080/03019233.2023.2166264","DOIUrl":"https://doi.org/10.1080/03019233.2023.2166264","url":null,"abstract":"ABSTRACT The cross-sectional profile of hot-rolled silicon steel strips has a great impact on the transverse thickness difference of cold-rolled strips. The genetic algorithm - Levenberg Marquardt - backpropagation neural network model was developed for the analysis of heredity effect of the cross-sectional profile of hot-rolled strip. The feature importance was analysed based on random forest and extreme gradient boosting methods. Furthermore, the influence law was analysed by data visualization. The coupling term of the strip crown and thickness , the edge drop and the coupling term of the strip wedge and thickness are recommended as key indexes of the hot-rolled silicon steel strip. As the transverse thickness difference must be controlled below 7 μm, the corresponding , , should be controlled no more than 60, between -10∼10 μm and no more than 7.5 , respectively. Meanwhile, the requirement for the cross-sectional profile indexes is synchronous.","PeriodicalId":14753,"journal":{"name":"Ironmaking & Steelmaking","volume":"50 1","pages":"921 - 935"},"PeriodicalIF":2.1,"publicationDate":"2023-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42980058","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}
Pub Date : 2023-01-29DOI: 10.1080/03019233.2023.2167038
Changjun Guan, Haitao Ma, Y. You, Mengxiang Zheng
ABSTRACT During the smelting process of the AOD furnace, the unbalanced reaction of material will lead to the occurrence of splashing. It will not only damage the smelting equipment but also seriously injure the personnel. In this study, first, the information of liquid level, audio information and vibration information are detected by multiple sensors respectively. Then the fused information is used to forecast the splashing. Finally, the multitasking fuzzy controller is used to suppress splashing. The results show that the method of forecasting and suppressing splashing can accurately forecast and achieve rapid suppression. Thus the efficiency of smelting can be improved.
{"title":"Research on forecast and suppression splashing of AOD refining process","authors":"Changjun Guan, Haitao Ma, Y. You, Mengxiang Zheng","doi":"10.1080/03019233.2023.2167038","DOIUrl":"https://doi.org/10.1080/03019233.2023.2167038","url":null,"abstract":"ABSTRACT During the smelting process of the AOD furnace, the unbalanced reaction of material will lead to the occurrence of splashing. It will not only damage the smelting equipment but also seriously injure the personnel. In this study, first, the information of liquid level, audio information and vibration information are detected by multiple sensors respectively. Then the fused information is used to forecast the splashing. Finally, the multitasking fuzzy controller is used to suppress splashing. The results show that the method of forecasting and suppressing splashing can accurately forecast and achieve rapid suppression. Thus the efficiency of smelting can be improved.","PeriodicalId":14753,"journal":{"name":"Ironmaking & Steelmaking","volume":"50 1","pages":"936 - 943"},"PeriodicalIF":2.1,"publicationDate":"2023-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47774802","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}
Pub Date : 2023-01-29DOI: 10.1080/03019233.2023.2167368
Satyam Kumar, Achint Sarbajeet Bishoyi, R. Sarkar
ABSTRACT The effect of adding yttria (Y2O3) up to 2 wt.% on low cement high alumina castable is studied. Castable compositions with self-flowing and vibratable consistency (distribution coefficients, q = 0.21 and 0.29) are prepared using commercial raw materials and processed as per the conventional processing route, cured at 110°C, and fired at 1000 and 1550°C. An increase in yttria content is found to improve the physical and mechanical properties of castables for all temperatures. Phase analysis confirms the formation of the yttrium aluminate phase, and microstructural evaluation at 1550°C indicates enhanced bonding between the matrix and aggregate phase resulting in better density and strength properties.
{"title":"Effect of Y2O3 additions on low cement high alumina refractory castable","authors":"Satyam Kumar, Achint Sarbajeet Bishoyi, R. Sarkar","doi":"10.1080/03019233.2023.2167368","DOIUrl":"https://doi.org/10.1080/03019233.2023.2167368","url":null,"abstract":"ABSTRACT The effect of adding yttria (Y2O3) up to 2 wt.% on low cement high alumina castable is studied. Castable compositions with self-flowing and vibratable consistency (distribution coefficients, q = 0.21 and 0.29) are prepared using commercial raw materials and processed as per the conventional processing route, cured at 110°C, and fired at 1000 and 1550°C. An increase in yttria content is found to improve the physical and mechanical properties of castables for all temperatures. Phase analysis confirms the formation of the yttrium aluminate phase, and microstructural evaluation at 1550°C indicates enhanced bonding between the matrix and aggregate phase resulting in better density and strength properties.","PeriodicalId":14753,"journal":{"name":"Ironmaking & Steelmaking","volume":"50 1","pages":"944 - 950"},"PeriodicalIF":2.1,"publicationDate":"2023-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46140346","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}
Pub Date : 2023-01-23DOI: 10.1080/03019233.2022.2164121
Fei Huang, Jing Li, R. Zang
ABSTRACT The effect of Ce on inclusion evolution in the Al-killed high-strength steel is investigated through experimental observations and thermodynamic calculations. The microstructures are analysed by scanning electron microscope (SEM), optical microscope (OM) and electron backscattered diffraction (EBSD) analysis. Mechanical properties tests are carried out to study the effect of Ce on the tensile and impact properties. The results show that after Ce treatment, the typical inclusions are modified from Al2O3 inclusions and Al2O3+MnS complex inclusions to Ce-O-S inclusions, and the inclusions are refined. The area fraction, size and length/width ratio of martensite-austenite (M-A) constituents decrease with the addition of Ce. In the Ce-containing steel, the grains are finer, and the proportion of high angle grain boundaries and low-Σ coincidence site lattice boundaries is higher. Ce can improve the plasticity and impact toughness of the steel while maintaining high strength.
通过实验观察和热力学计算，研究了Ce对铝渗高强钢中夹杂物演化的影响。采用扫描电镜(SEM)、光学显微镜(OM)和电子背散射衍射(EBSD)分析了材料的微观结构。通过力学性能试验研究了Ce对拉伸和冲击性能的影响。结果表明:经Ce处理后，典型夹杂物由Al2O3夹杂物和Al2O3+MnS复合夹杂物变质为Ce- o - s夹杂物，夹杂物得到细化;随着Ce的加入，马氏体-奥氏体(M-A)组分的面积分数、尺寸和长宽比均降低。在含铈钢中，晶粒更细，高角度晶界和低-Σ重合点晶格晶界的比例更高。Ce能在保持高强度的同时提高钢的塑性和冲击韧性。
{"title":"Effect of Ce on inclusion, microstructure and mechanical properties of Al-killed high-strength steel","authors":"Fei Huang, Jing Li, R. Zang","doi":"10.1080/03019233.2022.2164121","DOIUrl":"https://doi.org/10.1080/03019233.2022.2164121","url":null,"abstract":"ABSTRACT The effect of Ce on inclusion evolution in the Al-killed high-strength steel is investigated through experimental observations and thermodynamic calculations. The microstructures are analysed by scanning electron microscope (SEM), optical microscope (OM) and electron backscattered diffraction (EBSD) analysis. Mechanical properties tests are carried out to study the effect of Ce on the tensile and impact properties. The results show that after Ce treatment, the typical inclusions are modified from Al2O3 inclusions and Al2O3+MnS complex inclusions to Ce-O-S inclusions, and the inclusions are refined. The area fraction, size and length/width ratio of martensite-austenite (M-A) constituents decrease with the addition of Ce. In the Ce-containing steel, the grains are finer, and the proportion of high angle grain boundaries and low-Σ coincidence site lattice boundaries is higher. Ce can improve the plasticity and impact toughness of the steel while maintaining high strength.","PeriodicalId":14753,"journal":{"name":"Ironmaking & Steelmaking","volume":"50 1","pages":"744 - 756"},"PeriodicalIF":2.1,"publicationDate":"2023-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48700738","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}
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