Metallurgical Research & Technology最新文献_第8页

Optimization of argon injection into shroud of tundish during continuous casting: a numerical study 连铸中间包包壳喷氩优化的数值研究

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/metal/2021087

Fengjun Chang, Liangjun Li, R. Xu, Yufen Wang, Xudong Cui

引用次数: 0

Study on the phase evolution and element migration of vanadium oxide during the nitridation process 氮化过程中氧化钒的相演化及元素迁移研究

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/METAL/2021027

J. Diao, J. Lei, Yi-Yu Qiu, Deman Liu, Hong-Yi Li, B. Xie, Gang Li

{"title":"Study on the phase evolution and element migration of vanadium oxide during the nitridation process","authors":"J. Diao, J. Lei, Yi-Yu Qiu, Deman Liu, Hong-Yi Li, B. Xie, Gang Li","doi":"10.1051/METAL/2021027","DOIUrl":"https://doi.org/10.1051/METAL/2021027","url":null,"abstract":"In this paper, a series of nitriding experiments were carried out to investigate the phase evolution and element migration in the nitriding process. The results show that it undergoes a low temperature reducing stage firstly. High valent vanadium oxides are reduced to V2 O3 between room temperature and 770 °C. In Ar atmosphere, V2 O3 reacts with C to form VC in the temperature interval of 770 °C∼1080 °C. In N2 atmosphere, V2 O3 reacts directly with N2 and C to form VN in the interval of 670 °C∼1050 °C. During 1050 °C∼1270 °C, part of the VN obtained in the previous reaction stage will react with C to form VC. High temperature is beneficial to the removal of impurity element sulfur. The volatilization of alkali metal elements in the pellet mainly occurs between 670 °C and 1270 °C. However, there are about 20% of sodium and potassium remain in the nitriding product. The volatile alkali metal vapor would react with other gases at the furnace cover to form a white sediment and deposits on the cover. The sediment mainly consists of Na2 CO3 , K2 CO3 , Na2 SO4 , K2 SO4 , KCl, etc.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"63 1","pages":"309"},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85198875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 strain ratio on hydrogen permeability properties of low carbon enamel steel 应变比对低碳搪瓷钢渗氢性能的影响

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/metal/2021053

R. Uzun, Ü. Başkaya, Z. Çetin, Y. Kılıç, O. Gündüz, Adem Bakkaloğlu

引用次数: 0

Numerical simulation of the flow, solidification, and solute transport in a billet mold under electromagnetic stirring 电磁搅拌下钢坯结晶器内流动、凝固及溶质输运的数值模拟

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/METAL/2021015

Yaoguang Li, Yan-hui Sun, X. Bai

{"title":"Numerical simulation of the flow, solidification, and solute transport in a billet mold under electromagnetic stirring","authors":"Yaoguang Li, Yan-hui Sun, X. Bai","doi":"10.1051/METAL/2021015","DOIUrl":"https://doi.org/10.1051/METAL/2021015","url":null,"abstract":"In this study, a coupled three-dimensional model of the billet continuous casting mold process was developed to investigate the characteristics of the macroscopic transmission behaviors under different mold electromagnetic stirring (M-EMS) parameters. The mold curvature was also considered during the modeling of electromagnetic and flow fields. The results indicate that the macroscopic physical quantities had nonsymmetrical distributions in the mold because of the mold curvature. However, the influence of mold curvature on the electromagnetic force could be ignored. The horizontal swirling flow caused by the M-EMS became stronger as the current density increased, which enhanced the dissipation of the molten steel superheat and promoted the growth of the solidification shell. However, the flushing of the bias hot jet slowed the growth of the local solidified shell. Meanwhile, the washing effect of the melt flow on the solidification front caused the solute element content near the billet surface to fluctuate. In addition, the distribution of the solute element content became more uneven in the strand transverse direction as the current density increased.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"67 1","pages":"221"},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80658911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 3

A novel Mg-Sn-Zn-Al-Mn magnesium alloy with superior corrosion properties 一种具有优异腐蚀性能的新型Mg-Sn-Zn-Al-Mn镁合金

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/metal/2021064

Ali Erçetin

引用次数: 10

Research on the variation of the inclusion and sulfur content in Pipeline steel 管道钢中夹杂物和硫含量变化的研究

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/METAL/2021010

Tongsheng Zhang, Li Rensheng, Wanlin Wang, Shi-fan Dai, Peisheng Lv, Tiang-tang Yan

{"title":"Research on the variation of the inclusion and sulfur content in Pipeline steel","authors":"Tongsheng Zhang, Li Rensheng, Wanlin Wang, Shi-fan Dai, Peisheng Lv, Tiang-tang Yan","doi":"10.1051/METAL/2021010","DOIUrl":"https://doi.org/10.1051/METAL/2021010","url":null,"abstract":"Pipeline steel is widely used in various industries, and the sulfur content and inclusions in steel have a significant impact on performance, which determines whether the steel quality is qualified. The experiments were carried out to explore the sulfur content and inclusion evolution of pipeline steel which was deoxidized by Si–Mn–Al with “EAF-LF-VD-T-CC”. The samples of molten steel and slag were taken during the process of LF-VD-Tundish after EAF tapping. The kinetics model was established to simulate the desulfuration process of molten steel in actual production, obtaining a result which the error is within 3 ppm. It can be summarized that proper calcium treatment can transform the inclusion into a liquid inclusion, the value of [Ca] ranges from 25 to 45 ppm. Too high and lower calcium treatment can cause the compositions of inclusions to deviate from the liquid phase area, while too low calcium treatment will increase the overall size and density of the inclusions. In addition, the evolution of inclusion in steel at refining temperature and during solidification process was comprehensively calculated, considering all types of inclusions such as calcium oxide, magnesium oxide, aluminum oxide, calcium sulfide, spinel, calcium aluminate and liquid inclusion. The thermodynamic calculations are in good agreement with experimental results, which can predict the formation of the inclusions in Si–Mn–Al deoxidized pipeline steel.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"89 1","pages":"214"},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81232349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Influence of process temperature on fatigue crack growth rate of copper in equal channel angular pressing 工艺温度对铜等径角挤压疲劳裂纹扩展速率的影响

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/metal/2021062

Kaveh Abbasi, M. Vakili-Azghandi, A. Shirazi

{"title":"Influence of process temperature on fatigue crack growth rate of copper in equal channel angular pressing","authors":"Kaveh Abbasi, M. Vakili-Azghandi, A. Shirazi","doi":"10.1051/metal/2021062","DOIUrl":"https://doi.org/10.1051/metal/2021062","url":null,"abstract":"The mechanical properties including Vickers hardness, tensile properties and fatigue crack growth rate and also, the microstructure of pure copper severely deformed by the ECAP in different temperatures, were studied in the present work. The equal channel angular pressing (ECAP) is a process applied to make fine grains microstructure. On the other hand, high temperature provides an opportunity for recrystallization of materials and reduces required force for ECAP at the same time. In this paper we have tried to find optimized temperature to perform ECAP effectively and reduce required force. The results indicated that the grains size can reduce from 18.2 to 2.7 µm by ECAP process. This study shows that because of the recrystallization phenomenon and reducing the effect of stress concentration and increasing the number of grain boundaries, the fatigue crack growth rate can decrease significantly. Also, it was found that the major improvement in tensile properties in all the temperature conditions and due to the applied simple shear to the copper, all the ECAPed specimens have demonstrated an enhanced hardness and resistance to fatigue crack growth. Although, these improvements decrease when the temperature increases. Finally, the SEM images of the fatigue fraction sections revealed three areas including, crack initiation, stable crack growth, and final fracture zone. It seems that the final fracture appeared to be a ductile fracture in the ECAP copper sample.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"18 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81681869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Overview of metallurgical studies on weld deposited surface by plasma transferred arc technique 等离子转移电弧熔敷表面冶金研究综述

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/METAL/2020088

V. Kalyankar, H. Naik

{"title":"Overview of metallurgical studies on weld deposited surface by plasma transferred arc technique","authors":"V. Kalyankar, H. Naik","doi":"10.1051/METAL/2020088","DOIUrl":"https://doi.org/10.1051/METAL/2020088","url":null,"abstract":"Research on plasma transferred arc (PTA) coatings has increased contemplation due to its augmented appropriateness which results from the advanced materials used in applications like mining, petroleum and power plant sectors. This article further broadens the research scope of investigation, by influencing metallurgical and processing aspects in accordance with the significance of microstructural changes. Martensitic formation with coarser structure, carbide phase formation and fine interdendritic eutectic matrix are the significant metallurgical aspects for an improved surface characteristic. Welding current, powder feed rate and travel speed, are the significant processing variables to achieve the microstructural changes like uniform dendritic growth, finer grain size, etc. The addition of alloying elements and heat treatment are the most observed processing conditions for the formation of precipitates and carbide phases. A schematic summary, the significance of processing variables, processing conditions and process modelling and simulation on metallurgical aspects have been enumerated in this paper. Further, critical comments and findings from in-depth review have also been discussed for the future scope. Hence, this review will be helpful to ascertain the relation among the microstructural evolution, the applicability of microscopic tools and the mechanical properties for the forthcoming researchers and the industrial persons.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"25 1","pages":"111"},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85922265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 3

Preparation of high-strength biochar composite briquette for blast furnace ironmaking 高炉炼铁用高强度生物炭复合型煤的制备

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/METAL/2020083

Zi Yu, Zhu Liu, Huiqing Tang, Q. Xue

{"title":"Preparation of high-strength biochar composite briquette for blast furnace ironmaking","authors":"Zi Yu, Zhu Liu, Huiqing Tang, Q. Xue","doi":"10.1051/METAL/2020083","DOIUrl":"https://doi.org/10.1051/METAL/2020083","url":null,"abstract":"In this research, using iron-oxide fines (average size: 2.5 μm) and biochar fines (average size: 50.0 μm), the biochar composite briquette (BCB) for blast furnace (BF) application was prepared by cold briquetting followed by heat treatment. The preparing conditions were optimized regarding its cold crushing strength. Anti-pulverization capability, reaction development, and structure evolution of the optimally-designed BCB under simulated BF conditions were then examined. Results of optimizing BCB preparation conditions showed that a heating temperature of 1073 K was optimal for preparing the BCB. The optimally-designed BCB contained 11.10 wt.% carbon, 72.21 wt.% Fe3 O4 , 11.25 wt.% FeO, and 0.77 wt.% Fe, 6.44 wt.% gangue, and had a cold crushing strength of 1800 N/briquette. Results of BCB behavior under simulated BF conditions showed that the cold crushing strength after partial reaction of the BCB ranged from 1500 N/briquette to 5500 N/briquette and its maximum volume shrinkage degree was 0.45. The high anti-pulverization capability of the BCB was supported by the slag matrix or the iron network. Under the simulated BF conditions, the BCB underwent five stages of reduction by atmosphere, partial self-reduction and reduction by atmosphere, full self-reduction, partial self-reduction and gasification by atmosphere, and gasification by atmosphere. It is inferred from the experimental findings that, by charging the BCB in BF, an increase of top gas utilization efficiency could be realized, and a favorable influence on lowering the temperature level of the thermal reserve zone could be obtained.","PeriodicalId":18527,"journal":{"name":"Metallurgical Research & Technology","volume":"30 1","pages":"109"},"PeriodicalIF":1.1,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78785844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 4

Three-dimensional numerical simulation of velocity field distribution in an oxy-coal combustor-melter-separator furnace 氧煤燃烧室-熔体-分离器炉内速度场分布的三维数值模拟

IF 1.1 4区材料科学

Metallurgical Research & Technology Pub Date : 2021-01-01 DOI: 10.1051/metal/2021066

Yaou Shen, K. Zhao, Zheng Kong, Yu-zhu Zhang, Yan Shi, Y. Qi

引用次数: 0