Journal of Iron and Steel Research International最新文献_第2页

Effect of Ni interlayer on microstructures and mechanical properties of 2205 duplex stainless steel joint by laser oscillating welding 镍中间膜对激光振荡焊接 2205 双相不锈钢接头微观结构和机械性能的影响

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-09-14 DOI: 10.1007/s42243-024-01328-w

Jing-wei Yang, Xu-yang Liu, Tao Li, Lai-cai Chen, Kai Yang, Zong-ye Ding, Jie Zhang, Jian Qiao

{"title":"Effect of Ni interlayer on microstructures and mechanical properties of 2205 duplex stainless steel joint by laser oscillating welding","authors":"Jing-wei Yang, Xu-yang Liu, Tao Li, Lai-cai Chen, Kai Yang, Zong-ye Ding, Jie Zhang, Jian Qiao","doi":"10.1007/s42243-024-01328-w","DOIUrl":"https://doi.org/10.1007/s42243-024-01328-w","url":null,"abstract":"Laser oscillating welding of 2205 duplex stainless steel was performed using Ni interlayer as filler material. The influence of stirring effect caused by laser oscillating and Ni addition in the behavior of molten pool and the microstructure evolution was investigated. The results shows that Ni addition decreased the ratio of chromium equivalent and nickel equivalent in the molten pool and accelerated the austenitic transformation. The austenite/ferrite ratio was regulated, and the precipitation of nitrides was suppressed in the weld seam. The stirring effect caused by the oscillating beam facilitated the uniform distribution of Ni elements within the molten pool, promoting the formation of the homogeneous microstructures in the weld seam. With increasing the thickness of Ni interlayer, both the dimension and the peak temperature of molten pool decrease, further increasing the cooling rate and refining the grain size. When the thickness of Ni interlayer was 50 μm, the austenite/ferrite ratio in the weld seam was close to 1:1, and the grain size reached the minimum value. The tensile strength and ductility of the welded joint using Ni interlayer with thickness were 774 MPa and 25%, respectively, significantly improving the mechanical properties of 2205 duplex stainless steel joint welded without Ni addition.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"74 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Corrosion and passive behavior of SLM and wrought TA15 titanium alloys in hydrochloric acid solutions SLM 和锻造 TA15 钛合金在盐酸溶液中的腐蚀和被动行为

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-09-14 DOI: 10.1007/s42243-024-01316-0

Xing-xing Li, Li-yi Chen, Wen-bin Hu, Shan Wan, Long-fei Song, Yi-peng Wang, Bo-kai Liao, Xing-peng Guo

{"title":"Corrosion and passive behavior of SLM and wrought TA15 titanium alloys in hydrochloric acid solutions","authors":"Xing-xing Li, Li-yi Chen, Wen-bin Hu, Shan Wan, Long-fei Song, Yi-peng Wang, Bo-kai Liao, Xing-peng Guo","doi":"10.1007/s42243-024-01316-0","DOIUrl":"https://doi.org/10.1007/s42243-024-01316-0","url":null,"abstract":"The corrosion behavior of Ti–6Al–2Zr–1Mo–1V (TA15) alloy fabricated through selective laser melting (SLM) technology and traditional wrought technology in hydrochloric acid solutions was investigated using electrochemical testing and surface characterizations, including electron backscattered diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy analyses. The results showed that both types of TA15 alloy underwent spontaneous passivation reactions in HCl solution, and with the increase in HCl concentration, the surface of SLM-TA15 sample exhibited larger and deeper pits. In comparison to SLM-TA15 sample, the pits on the wrought-TA15 sample were shallower and the surface was more uniform. Analysis of the passive current density, breakdown potential, and electrochemical impedance revealed that the corrosion resistance of both alloys decreased as the concentration of HCl increased, and SLM sample exhibited poorer corrosion resistance compared with the wrought sample. Analysis of Mott–Schottky test curves and calculation of passive film thickness indicated that the passive film of wrought-TA15 sample was superior to that of SLM-TA15 sample.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"40 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effect of Nb on high-temperature oxidation of austenitic stainless steel at 850 °C 铌对奥氏体不锈钢在 850 °C 高温氧化的影响

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-09-14 DOI: 10.1007/s42243-024-01297-0

Fan Wang, Gui-zhi Xiao, De-ning Zou, Kai-xin Zhang, Xiao-ming Zhang, Yang Li, Li-bo Tong, Yi-cheng Jiang, Bo Song

{"title":"Effect of Nb on high-temperature oxidation of austenitic stainless steel at 850 °C","authors":"Fan Wang, Gui-zhi Xiao, De-ning Zou, Kai-xin Zhang, Xiao-ming Zhang, Yang Li, Li-bo Tong, Yi-cheng Jiang, Bo Song","doi":"10.1007/s42243-024-01297-0","DOIUrl":"https://doi.org/10.1007/s42243-024-01297-0","url":null,"abstract":"The effects of niobium on the high-temperature oxidation resistance of austenitic stainless steel were systematically investigated. Two austenitic stainless steels with different Nb contents were prepared and exposed to air at 850 °C for 200 h. Results show that Nb positively affects the high-temperature oxidation resistance of austenitic stainless steels. The matrix organization of austenitic stainless steels with added niobium does not change, while the austenitic grain size is significantly refined, and it also promoted the release of internal stresses in the oxide film, which in turn improved the integrity of the oxide film and adhesion to the substrate. In addition, with the addition of Nb element, a large number of Nb(C, N) particles are diffusely distributed in the matrix. Nb(C, N) phase distributed in the matrix and the niobium-rich layer formed by the diffusion of niobium into the interface between the metal matrix and the oxide film during the high-temperature oxidation process effectively prevents the diffusion of iron into the outer layer and enhances the oxidation resistance at high temperatures.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"21 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A new insight into iron ore oxidized pellets prepared by steel belt roasting process 钢带焙烧工艺制备铁矿石氧化球团的新见解

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-09-14 DOI: 10.1007/s42243-024-01336-w

Tao Jing, Hao Lv, Min Gan, Xiao-hui Fan, Jing Li, You-xun Dai, Zhuo-qi Liu, Shi-xian Li

{"title":"A new insight into iron ore oxidized pellets prepared by steel belt roasting process","authors":"Tao Jing, Hao Lv, Min Gan, Xiao-hui Fan, Jing Li, You-xun Dai, Zhuo-qi Liu, Shi-xian Li","doi":"10.1007/s42243-024-01336-w","DOIUrl":"https://doi.org/10.1007/s42243-024-01336-w","url":null,"abstract":"The steel belt roasting process has the advantages of low cost, small footprint, and high thermal efficiency, making it widely used in the smelting of ferroalloys such as ferrochrome, ferromanganese, and ferroniobium. However, its application in preparing iron ore oxidized pellets has not been sufficiently explored. The optimal thermal process conditions for magnesium-containing oxidized pellet preparation by steel belt roasting machine were investigated based on the roasting properties of high-magnesium iron concentrate and typical iron concentrate. The results indicate that, for the blending scheme of 70 wt.% high-magnesium iron concentrate and 30 wt.% typical iron concentrate, the appropriate preheating temperature for pellets is 950–975 °C and the suitable roasting temperature is 1250–1275 °C, during which the compressive strength of pellets can exceed 2500 N pellet−1. During the steel belt roasting process, SO2 is primarily released in the preheating zone, and the maximum exhaust gas temperature in the roasting zone can reach 637 °C. High-temperature sulfur-containing exhaust gas causes oxidation corrosion, sulfide corrosion, and deformation of the steel belt. To enhance the steel belt longevity, it is recommended to appropriately reduce the wind velocity in the preheating zone and roasting zone, while also decreasing the ratio of pellet bed height to hearth layer height. By adopting the system of “low wind velocity, thin pellet bed, fast steel belt speed,” the exhaust gas temperature can be reduced to 463 °C. The prepared pellet maintains a compressive strength of 2607 N pellet−1 and exhibits excellent metallurgical properties.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"45 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Microstructure–property correlation and strain partitioning behavior in medium-carbon carbide-free bainitic steel 中碳无碳化物贝氏体钢的显微组织-性能相关性和应变分配行为

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-09-09 DOI: 10.1007/s42243-024-01310-6

Ru Su, Xiong-wei Zheng, Jie Kang, Da-yong Wu, Hai-kun Ma, Fu-cheng Zhang, Zhi-nan Yang, Qing Li

{"title":"Microstructure–property correlation and strain partitioning behavior in medium-carbon carbide-free bainitic steel","authors":"Ru Su, Xiong-wei Zheng, Jie Kang, Da-yong Wu, Hai-kun Ma, Fu-cheng Zhang, Zhi-nan Yang, Qing Li","doi":"10.1007/s42243-024-01310-6","DOIUrl":"https://doi.org/10.1007/s42243-024-01310-6","url":null,"abstract":"The correlation between the microstructure, properties, and strain partitioning behavior in a medium-carbon carbide-free bainitic steel was investigated through a combination of experiments and representative volume element simulations. The results reveal that as the austempering temperature increases from low to intermediate, the optimal balance of properties shifts from strength–toughness to plasticity–toughness. The formation of fine bainitic ferrite plates and bainite sheaves under low austempering temperature (270 °C) enhances both strength and toughness. Conversely, the wide size and shape distribution of the retained austenite (RA) obtained through austempering at intermediate temperature (350 °C) contribute to increased work-hardening capacity, resulting in enhanced plasticity. The volume fraction of the ductile film-like RA plays a crucial role in enhancing impact toughness under relatively higher austempering temperatures. In the simulations of tensile deformation, the concentration of equivalent plastic strain predominantly manifests in the bainitic ferrite neighboring the martensite, whereas the equivalent plastic strain evenly spreads between the thin film-like retained austenite and bainitic ferrite. It is predicted that the cracks will occur at the interface between martensite and bainitic ferrite where the strain is concentrated, and eventually propagate along the strain failure zone.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"31 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Influence of microalloying element vanadium on microstructure and mechanical properties of anchor steel 微合金化元素钒对锚固钢微观结构和机械性能的影响

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-09-09 DOI: 10.1007/s42243-024-01319-x

Zhen Zhang, Hang Liu, Chao-yun Yang, Zhen Zhang, Xiao-wei Chu, Yi-kun Luan, Xing Li, Lu-han Hao, Xing-zhong Zhang

{"title":"Influence of microalloying element vanadium on microstructure and mechanical properties of anchor steel","authors":"Zhen Zhang, Hang Liu, Chao-yun Yang, Zhen Zhang, Xiao-wei Chu, Yi-kun Luan, Xing Li, Lu-han Hao, Xing-zhong Zhang","doi":"10.1007/s42243-024-01319-x","DOIUrl":"https://doi.org/10.1007/s42243-024-01319-x","url":null,"abstract":"The effect of vanadium (V) element on the microstructure and mechanical properties of anchor steel was explored by microstructural characterization and mechanical property tests of anchor steels with different V contents. The results indicated that the trace addition of V element can generate dispersed VC nanoparticles in the anchor steel and then refine microstructure by inhibiting austenite grain growth. The increase in V content leads to the formation of a larger amount of smaller VC nanoparticles and more refined microstructure. Moreover, the increasing V content in anchor steel causes the volume fraction of ferrite to increase and that of pearlite to decrease continuously, and even leads to the formation of bainite. Accompanied by the microstructure change, the V-treated anchor steels exhibit higher strength compared with the anchor steel without V addition. However, the increased hardness difference between ferrite and pearlite results in poor coordination of deformation between them, leading to a decrease in their plasticity. The impact toughness of anchor steel first increases but then significantly decreases with the increase in V content. The improvement in impact toughness of trace V-treated anchor steel benefits from the enhancement in the band structure after hot rolling, which consumes more energy during the vertical crack propagation process. However, when the V content further increases, the hard and brittle bainite in the anchor steel can facilitate crack initiation and propagation, ultimately resulting in a reduced toughness.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"14 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 existence state and deterioration mechanism of coke in a blast furnace hearth 高炉炉膛中焦炭的存在状态和劣化机理分析

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-09-02 DOI: 10.1007/s42243-024-01327-x

Wen-quan Niu, Jing-song Wang, Guang Wang, Hai-bin Zuo, Xue-feng She, Qing-guo Xue

{"title":"Analysis of existence state and deterioration mechanism of coke in a blast furnace hearth","authors":"Wen-quan Niu, Jing-song Wang, Guang Wang, Hai-bin Zuo, Xue-feng She, Qing-guo Xue","doi":"10.1007/s42243-024-01327-x","DOIUrl":"https://doi.org/10.1007/s42243-024-01327-x","url":null,"abstract":"Pursuing green, low-carbon ironmaking technology primarily aims to reduce fuel ratios, especially coke ratios. Simultaneously, the reduction in coke ratios causes the coke layer in the blast furnace (BF) to become thinner, deteriorating the gas and liquid permeability of the burden column. This exacerbates coke degradation, significantly impacting the smelting process and increasing the demand for high-quality coke. To investigate the existence state of coke in the hearth, a 2500 m3 BF in China was taken as the research object, and three sets of samples at different heights of the hearth were obtained during planned outage. The results indicate that coke undergoes a significant degradation upon reaching the hearth. The proportion of coke particles smaller than 50 mm ranges from 81.22% to 89.50%. The proportion of coke particles larger than 20 mm decreases as the distance from the centerline of the tuyere increases, while the proportion of particles smaller than 10 mm increases with this distance. Additionally, the closer the bottom of the furnace is, the smaller the coke particle size becomes. The composition of slag filling the coke pores is similar to that of the final slag in the blast furnace, and the graphitization of coke is comparable to that of the final slag. The graphitization of coke starts from the surface of coke and leads to the formation of coke fines, and the graphitization degree of − 74 μm coke fines is the highest. The temperature has an effect on the reaction rate of coke solution loss, and the higher the temperature is, the faster the reaction rate is.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"45 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Cross wedge rolling deformation law and bonding mechanism of 304 stainless steel/Q235 carbon steel bimetallic shaft 304 不锈钢/Q235 碳钢双金属轴的交叉楔形轧制变形规律和结合机理

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-08-30 DOI: 10.1007/s42243-024-01300-8

Le Zhu, Chao-yang Sun, Bao-yu Wang, Jing Zhou

{"title":"Cross wedge rolling deformation law and bonding mechanism of 304 stainless steel/Q235 carbon steel bimetallic shaft","authors":"Le Zhu, Chao-yang Sun, Bao-yu Wang, Jing Zhou","doi":"10.1007/s42243-024-01300-8","DOIUrl":"https://doi.org/10.1007/s42243-024-01300-8","url":null,"abstract":"304 stainless steel (SS)/Q235 carbon steel (CS) bimetallic composite shafts were prepared by the cross wedge rolling (CWR). The bonding interface welding mechanism was investigated through CWR rolling experiments and finite element simulation, as well as element diffusion, microstructure analysis, and mechanical property tests. According to simulation studies, the bonding interface is primarily subjected to three-directional compressive stresses at the tool–workpiece contact zone. As compression ratio increases from 0.25 to 0.35, the interface of the stress penetration area increases, while the diameter and wall thickness of CS/SS bimetallic shaft decrease, and hence, thickness-to-diameter ratio remains unchanged, which is conducive to the coordinated deformation of inner and outer metals and the interface of welded joints. The microstructure analysis of the interface shows that there are no obvious defects and cracks in the attachment, and that the microstructure on CS side is dominated by ferrite and martensite phases. Caused by the decarburization effect, Q235 steel microstructure features coarse ferrite, accompanied by a carburized layer with a thickness of about 20 μm on SS side near the interface where grains are refined. As radial compression ratio increases, the diffusion distance of Cr, Ni, and other elements increases, the average thickness of the decarburized layer decreases, the interfacial bonding strength increases from 450 to 490 MPa, and metallurgical bonding at the interface is thus improved. The study demonstrates that it is feasible to use 304 SS and Q235 CS for cross wedge rolling composite shafts.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"155 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Influence of typical elements and heat treatment parameters on hardenability in steel: a review 典型元素和热处理参数对钢淬透性的影响：综述

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-08-29 DOI: 10.1007/s42243-024-01307-1

Bin-bin Wang, De-xin Zhu, Chao-lei Zhang, Xiao-ye Zhou, Hong-hui Wu, Shui-ze Wang, Gui-lin Wu, Jun-heng Gao, Hai-tao Zhao, Xin-ping Mao

{"title":"Influence of typical elements and heat treatment parameters on hardenability in steel: a review","authors":"Bin-bin Wang, De-xin Zhu, Chao-lei Zhang, Xiao-ye Zhou, Hong-hui Wu, Shui-ze Wang, Gui-lin Wu, Jun-heng Gao, Hai-tao Zhao, Xin-ping Mao","doi":"10.1007/s42243-024-01307-1","DOIUrl":"https://doi.org/10.1007/s42243-024-01307-1","url":null,"abstract":"The hardenability of steel is crucial for its durability and performance in engineering applications, significantly influencing mechanical properties such as hardness, strength, and wear resistance. As the engineering field continuously demands higher-performance steel materials, a deep understanding of the key influencing factors on hardenability is crucial for developing quality steel that meets stringent application requirements. The effects of some specific elements, including carbon (C), vanadium (V), molybdenum (Mo), and boron (B), as well as heat treatment process parameters such as austenitizing temperature, austenitizing holding time, and cooling rate, were examined. It aims to elucidate the interactions among these factors and their influence on steel hardenability. For each influencing factor, the heat treatment procedure, characteristic microstructure resulting from it, and corresponding Jominy end quench curves were discussed. Furthermore, based on the continuous development of big data technology in the field of materials, the use of machine learning to predict the hardenability of steel and guide the design of steel material was also introduced.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"39 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Denitrification characteristics and reaction mechanism of Ce-doped Fe-based catalysts from modified metallurgical dust containing iron 改性含铁冶金粉尘中掺杂 Ce 的铁基催化剂的脱氮特性和反应机理

IF 2.5 2区材料科学

Journal of Iron and Steel Research International Pub Date : 2024-08-29 DOI: 10.1007/s42243-024-01293-4

Zhi-fang Gao, Hong-ming Long, Xiang-peng Gao, Hao Zhang

{"title":"Denitrification characteristics and reaction mechanism of Ce-doped Fe-based catalysts from modified metallurgical dust containing iron","authors":"Zhi-fang Gao, Hong-ming Long, Xiang-peng Gao, Hao Zhang","doi":"10.1007/s42243-024-01293-4","DOIUrl":"https://doi.org/10.1007/s42243-024-01293-4","url":null,"abstract":"Metallurgical dust (MD) was used as raw material to prepare rare earth Ce-doped Fe-based catalysts. The results show that the Ce0.1/AMD-300 °C catalyst prepared from acid-modified diatomite (AMD) with mCe/mMD = 0.1 (mCe and mMD are the mass of Ce and MD, respectively) after being roasted at 300 °C can reach 99% NOx removal rate in the wide temperature range of 230–430 °C and exhibits excellent SO2 and H2O resistance. The MD effectively removes alkali metal elements by the modification process, increases the specific surface area and optimizes the pore structure of MD. The doping of Ce element makes Fe-based catalysts have more surface adsorbed oxygen Oα and a higher Ce3+/Ce4+ ratio. Through ammonia temperature-programmed desorption and hydrogen temperature-programmed reduction, it was found that the strong interaction between cerium and iron promotes the formation of more oxygen cavities in the catalyst, thereby generating more active and easily reducible oxygen species and promoting the transformation of Brønsted acid site to Lewis acid site. The research results provide a theoretical basis for the preparation of efficient and inexpensive Fe-based catalysts from MD.","PeriodicalId":16151,"journal":{"name":"Journal of Iron and Steel Research International","volume":"24 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142185729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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