Metallurgical and Materials Transactions B最新文献_第10页

Numerical Analysis of Multiphase Flow and Post-Combustion Characteristics in a Top-Blown Converter with Various Operating Parameters 不同运行参数下顶吹式转换器中多相流和燃烧后特性的数值分析

Metallurgical and Materials Transactions B Pub Date : 2024-06-17 DOI: 10.1007/s11663-024-03173-4

Shuguo Zheng, Pengyuan Dong, Miaoyong Zhu

{"title":"Numerical Analysis of Multiphase Flow and Post-Combustion Characteristics in a Top-Blown Converter with Various Operating Parameters","authors":"Shuguo Zheng, Pengyuan Dong, Miaoyong Zhu","doi":"10.1007/s11663-024-03173-4","DOIUrl":"https://doi.org/10.1007/s11663-024-03173-4","url":null,"abstract":"To describe the characteristics of multiphase flow and post-combustion in the converter, two separate 3D models are established in present work. The first model, known as the jet-cavity model, focuses on the interaction between oxygen jet and liquid bath, and discusses the effects of different operating parameters (lance height and operating pressure) on gas-slag-metal behavior. The results show that the impact of oxygen jet on bath surface produces rough surface waves, cavities and some metal sheets on the slag surface. Decreasing lance height or increasing operating pressure may enhance the impact of oxygen jet on molten bath. With the decrease of lance height, the penetration depth increases, while the impact diameter decreases. Increasing the operating pressure increases the penetration depth, but it has little effect on the impact diameter. The second model is called the post-combustion model, which is to describe post-combustion of CO in converter space. It is based on the cavity size (impact diameter and penetration depth) obtained by the above jet-cavity model, and analyzes the post-combustion characteristics with the single-flow post-combustion lance (SF-PCL) under different operating parameters. The results indicate that high-temperature zones and CO2 produced by post-combustion reaction are mainly located in the jet boundaries and the regions among multiple jets. Increasing lance height or operating pressure helps to burn more CO. The post-combustion ratio of converter at the lance height of 1.6 m is 1.08 and 1.04 times than that of H = 1.2 m and H = 1.4 m, respectively. When the operating pressure is 0.89 MPa, it is 1.05 and 1.03 times than that of P = 0.69 MPa and P = 0.79 MPa, respectively.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141516368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hot Tearing of Fe-18Mn-0.6C-2.6Al High Manganese Steel 热撕裂 Fe-18Mn-0.6C-2.6Al 高锰钢

Metallurgical and Materials Transactions B Pub Date : 2024-06-17 DOI: 10.1007/s11663-024-03153-8

Qingtao Guo, Yu Zhao, Zenghuang Lin, Tianyu Li, Shen Sun, Honggang Zhong, Qijie Zhai

{"title":"Hot Tearing of Fe-18Mn-0.6C-2.6Al High Manganese Steel","authors":"Qingtao Guo, Yu Zhao, Zenghuang Lin, Tianyu Li, Shen Sun, Honggang Zhong, Qijie Zhai","doi":"10.1007/s11663-024-03153-8","DOIUrl":"https://doi.org/10.1007/s11663-024-03153-8","url":null,"abstract":"Fe-Mn-C-Al high manganese steel has a large tendency to hot tearing, making it difficult to continuously cast and even leading to steel leakage accidents. In this paper, the effects of cooling rate and strain rate on the hot tearing behavior of Fe-18Mn-0.6C-2.6Al (18Mn) steel are investigated. The results show that 18Mn steel is prone to forming multiple cracks. When cracks propagate at higher temperatures, the stress rapidly decreases and exhibits brittle fracture characteristics. However, when the crack propagation temperature is lower, the rate of stress reduction significantly decreases, exhibiting ductile fracture characteristics. The temperature range of hot tearing of 18Mn steel is 1364 °C to 1344 °C, corresponding to the solid fraction of 0.88 to 0.99, and the initial crack propagation stress was 10.73 to 20.03 MPa. It indicates that, with the increase of the strain rate or the decrease of the cooling rate, the cracking temperature increases, and the peak stress decreases. In addition, when the propagation temperature is lower than the solidus, the cracks are no longer called hot tearing, but it will still cause damage in production. This study is valuable for the prediction of hot tearing and process design of continuous casting of Fe-Mn-C-Al high manganese steel.<h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"226 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141516372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing Rapid and Deep Removal of Trace Impurities from Tellurium by an Immersion Rotational Segregation Purification Process 通过浸入式旋转分离纯化工艺提高碲中痕量杂质的快速深度去除能力

Metallurgical and Materials Transactions B Pub Date : 2024-06-17 DOI: 10.1007/s11663-024-03167-2

Houyuan Zhang, Guoyu Qian, Jiachen Pang, Zhi Wang

引用次数: 0

Phase Equilibria of Ti-Bearing Electric Furnace Slags in Air at 1400 °C in CaO–MgO–SiO2–13 wt pct Al2O3–50 wt pct TiO2 System 1400 ℃ 空气中 CaO-MgO-SiO2-13 wt pct Al2O3-50 wt pct TiO2 体系中含钛电炉炉渣的相平衡

Metallurgical and Materials Transactions B Pub Date : 2024-06-17 DOI: 10.1007/s11663-024-03161-8

Jian-Fa Jing, Shuai Wang, Yu-Feng Guo, Feng Chen, Ling-Zhi Yang

{"title":"Phase Equilibria of Ti-Bearing Electric Furnace Slags in Air at 1400 °C in CaO–MgO–SiO2–13 wt pct Al2O3–50 wt pct TiO2 System","authors":"Jian-Fa Jing, Shuai Wang, Yu-Feng Guo, Feng Chen, Ling-Zhi Yang","doi":"10.1007/s11663-024-03161-8","DOIUrl":"https://doi.org/10.1007/s11663-024-03161-8","url":null,"abstract":"Phase equilibria for the CaO–MgO–SiO2–13 wt pct Al2O3–50 wt pct TiO2 system were experimentally investigated at 1400 °C in air atmosphere, employing the high-temperature equilibration and quenching method. Seven distinct phases were identified, encompassing a liquid phase, a liquid phase with perovskite (CaTiO3), a liquid phase with rutile (TiO2), a liquid phase with anosovite (M3O5), a liquid phase with anosovite and rutile, a liquid phase with anosovite and spinel, and a liquid phase with perovskite and spinel. Additionally, an experimentally verified isotherm at 1400 °C was obtained and conducted a comparative analysis with predictions generated using FactSage software. Overall, the FactSage 8.1 software exhibited a notable tendency to overestimated the liquidus temperatures in the M3O5 and spinel phases regions when compared to the experimentally determined values. This disparity may be attributed to limitations in the FactSage 8.1 software database which lack of Al2TiO5 in the “FToxid-PSEU” solution species, as it indicated a large liquid phase region in the CaO–MgO–SiO2–13 wt pct Al2O3–50 wt pct TiO2 system at 1400 °C than what we experimentally determined.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"226 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141516367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement Mechanisms of Hydrogen on Metallothermic Reduction of TiO2 and Anti-oxidation of Titanium Hydride 氢气对 TiO2 金属热还原和氢化钛抗氧化的促进机制

Metallurgical and Materials Transactions B Pub Date : 2024-06-14 DOI: 10.1007/s11663-024-03150-x

Zhuo Wang, Yonggang Wei, Yongxing Zheng, Shiwei Zhou, Bo Li, Haoyuan Xu

引用次数: 0

Microstructure and Mechanical Property of Al 7075/Mg EW75 Composite Prepared by Asymmetric Co-extrusion with Symmetric Die 用对称模具非对称共挤制备的铝 7075/Mg EW75 复合材料的微观结构和力学性能

Metallurgical and Materials Transactions B Pub Date : 2024-06-14 DOI: 10.1007/s11663-024-03157-4

Cong Wang

引用次数: 0

Elucidation of Solidification Behavior of Ti–6Al–4V under Convection and a Temperature Gradient Using Levitation Methods 利用悬浮方法阐明对流和温度梯度条件下 Ti-6Al-4V 的凝固行为

Metallurgical and Materials Transactions B Pub Date : 2024-06-14 DOI: 10.1007/s11663-024-03148-5

Chihiro Hanada, Yuji Mabuchi, Koei Kadoi, Yuto Ueda, Yuta Kushiya, Hirokazu Aoki, Ryosei Saguchi, Motoko Yamada, Hisashi Sato, Yoshimi Watanabe, Yuma Harada, S. Ozawa, Shizuka Nakano, Hirohisa Oda, Chihiro Koyama, Takehiko Ishikawa, Y. Watanabe, Shinsuke Suzuki

引用次数: 0

Effect of SEN Asymmetric Clogging on Mold Level Fluctuation and Mold Slag Distribution During Continuous Casting SEN 不对称堵塞对连铸过程中模位波动和熔渣分布的影响

Metallurgical and Materials Transactions B Pub Date : 2024-06-14 DOI: 10.1007/s11663-024-03156-5

Zhendong Wang, Jinrui Liu, Heng Cui, Hao Sun, Yunzheng Wang

引用次数: 0

Suppression of Free-Surface Vortex in Tundish by Rotating Stopper-Rod and Its Impact on Multiphase Flow in Mold 旋转塞杆抑制盆底自由面涡流及其对模具中多相流的影响

Metallurgical and Materials Transactions B Pub Date : 2024-06-14 DOI: 10.1007/s11663-024-03160-9

Kejie Huang, Hua Zhang, Pengsheng Lu, Fei Gao, Jiahui Wang, Qing Fang, Hongwei Ni

{"title":"Suppression of Free-Surface Vortex in Tundish by Rotating Stopper-Rod and Its Impact on Multiphase Flow in Mold","authors":"Kejie Huang, Hua Zhang, Pengsheng Lu, Fei Gao, Jiahui Wang, Qing Fang, Hongwei Ni","doi":"10.1007/s11663-024-03160-9","DOIUrl":"https://doi.org/10.1007/s11663-024-03160-9","url":null,"abstract":"The free-surface vortex at the end of tundish casting sequence induces slag carryover into the mold, which can induce reduction in metal yield, deterioration in billet quality, and disruption to production. In this paper, the results of multiphase flow behavior in both tundish and mold during the formation process of free-surface vortex calculated by large eddy simulation (LES) model the RNG k-ɛ model were firstly compared, then the effect of rotating speed of stopper-rod on vortex and mold was numerically investigated based on the LES model. The results showed that the LES model offers a more precise simulation of multiphase flow, providing a better representation of tundish swirl evolution, fluctuations at the steel/slag interface, and slag phase motion. When the rotating speed of stopper-rod is 60 r/min, the fluctuation of mold flux is minimized, with a maximum surface velocity of 0.12 m/s, a slag carryover velocity of 0.122 kg/s at the moment of vortex penetration, and the amount of residual steel is reduced by about 600 kg, the critical height of the 1st and 2nd strands is reduced by 13.5 mm and 15.5 mm, respectively, which performs clear advantage over the schemes of 0, 30, and 90 r/min. The present study can offer theoretical guidance on suppressing free-surface vortex in tundish on the premise of improving the multiphase flow in mold.","PeriodicalId":18613,"journal":{"name":"Metallurgical and Materials Transactions B","volume":"2012 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141516373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrothermal Synthesis of CuBi2O4 Nanosheets as Electrodes for Enhanced Performance in Aqueous Zn-Ion Battery and Supercapacitor 水热法合成 CuBi2O4 纳米片作为电极以提高锌离子水电池和超级电容器的性能

Metallurgical and Materials Transactions B Pub Date : 2024-06-12 DOI: 10.1007/s11663-024-03155-6

Xin Wang, Cuixia Cheng

引用次数: 0