Revue De Metallurgie-cahiers D Informations Techniques最新文献

Preparation and performance analysis of gas-quenched steel slag beads 气淬钢渣微珠的制备及性能分析

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-12-01 DOI: 10.1051/metal/2019073

Hui Wang, Zhang Wei, Chao Liu, Hongwei Xing, Guo Chen, Yuzhu Zhang

{"title":"Preparation and performance analysis of gas-quenched steel slag beads","authors":"Hui Wang, Zhang Wei, Chao Liu, Hongwei Xing, Guo Chen, Yuzhu Zhang","doi":"10.1051/metal/2019073","DOIUrl":"https://doi.org/10.1051/metal/2019073","url":null,"abstract":"The low utilization rate of steel slag in China has exposed serious environmental and social problems. In the present work, the basic oxygen furnace (BOF) slag was modified by blast furnace (BF) slag and then beaded by the means of gas quenching. The gas-quenching rate, bead formation rate, physical properties, microscopic characteristics and free lime (f-CaO) of gas-quenched slag beads were analyzed to broaden the utilization of BOF slag. The results show that the more BF slag is added, the higher the gas-quenching rate is, and the lower the bead formation rate becomes. When no BF slag is added, the beads are mainly composed of magnetite, limonite and melilite. After BF slag is added, a large amount of glass phase and a little amount of Ca2 SiO4 and MgO are found in beads. The content of f-CaO beads decreases after the modified slag is gas quenched at high temperature. Moreover, the more BF slag is added, the higher the elimination rate of f-CaO becomes. Considering the industry standard of steel slag sand in China as well as the gas-quenching rate, physical and chemical properties, the gas-quenched steel slag beads with 5 and 15% BF slag better meet the medium sand standard, which can be used as fine aggregate.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79910782","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: 4

Abnormal toughness characteristics and fracture model in simulated welding HAZ of 5%Ni Steel 5%Ni钢模拟焊接热影响区异常韧性特征及断裂模式

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-06-01 DOI: 10.1051/metal/2020037

D. Min

引用次数: 0

Measurement of the steady state tearing in thin sheets using the contactless system 用非接触式系统测量薄板的稳态撕裂

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-05-01 DOI: 10.1051/metal/2020032

Ľ. Ambriško, L. Pešek

引用次数: 2

Evaluation of carbothermic processing for mixed discarded lithium-ion batteries 混合废弃锂离子电池碳热处理评价

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-04-01 DOI: 10.1051/metal/2020025

Sanjay Pindar, N. Dhawan

{"title":"Evaluation of carbothermic processing for mixed discarded lithium-ion batteries","authors":"Sanjay Pindar, N. Dhawan","doi":"10.1051/metal/2020025","DOIUrl":"https://doi.org/10.1051/metal/2020025","url":null,"abstract":"The limited life span and huge demand for lithium-ion batteries, environment concerns, and the consumption of rare metals such as lithium and cobalt are the key facts for the worldwide recycling efforts. In this study, the cathode material of discarded lithium-ion batteries was carbothermally reduced using recovered graphite. A comparative evaluation of reduction behavior of single-phase (LiCoO2 ) and mixed-phase (LiCoO2 .LiNi0.5 Mn1.5 O4 .LiMn2 O4 ) cathode materials was investigated under an ambient and inert atmosphere. Processing of single-phase cathode material in inert atmosphere yielded pure metallic cobalt, whereas, higher metallic recoveries and metal purity were obtained by processing of mixed cathode material in ambient conditions. The excellent product obtained under ambient conditions comprises 68% Co, 21% Mn, 2.5% Ni with saturation magnetization: 106 emu/g, and a precursor for the synthesis of cathode material. The process yield is 46.2% and lithium extraction 83%. In terms of metal purity and recovery, graphite was found to be better for reduction than activated charcoal. The process followed is simple, adaptable, and cost-effective for metals recovery from discarded lithium-ion batteries.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74653116","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: 3

Influence of Nb2O5 and basicity on the viscosity and structure of CaO-SiO2-Nb2O5-CeO2-CaF2 slag system Nb2O5和碱度对CaO-SiO2-Nb2O5-CeO2-CaF2渣体系粘度和结构的影响

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-04-01 DOI: 10.1051/metal/2020023

Zhuang Ma, Zengwu Zhao, Wentao Guo, Z. Wang

引用次数: 4

Application of integral method for investigating the boriding kinetics of AISI 316 steel 应用积分法研究AISI 316钢渗硼动力学

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-02-01 DOI: 10.1051/metal/2020011

Chaima Zouzou, M. Keddam

引用次数: 5

Enhancement of microstructure uniformity and grain refining efficiency of Al-5Ti-1B alloy via powder extrusion 粉末挤压提高Al-5Ti-1B合金组织均匀性和晶粒细化效率

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.1051/metal/2020069

Shun-cheng Wang, Huilan Huang, Zhibo Zhang, K. Zheng

引用次数: 0

Physical and numerical modeling of liquid slag entrainment in mould during slabs casting 板坯连铸过程中结晶器液渣夹带的物理和数值模拟

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.1051/metal/2020055

M. Bielnicki, J. Jowsa

{"title":"Physical and numerical modeling of liquid slag entrainment in mould during slabs casting","authors":"M. Bielnicki, J. Jowsa","doi":"10.1051/metal/2020055","DOIUrl":"https://doi.org/10.1051/metal/2020055","url":null,"abstract":"The paper presents results of physical and numerical modeling of liquid slag entrainment during continuous casting of steel slabs process. The main aim of this work was to determine the critical casting speed and also to specify, which entrainment mechanism is most responsible for transport of slag droplets into steel volume. Physical modeling was based on water-oil model of mould, made on reduced linear scale of Sl = 0.4. In mathematical modeling, Realizable k-e and LES WALE models were used to describe turbulent motion of water and oil, whereas Volume of Fluid model was used to take into account interactions between phases. It was found, that the main cause of slag entrainment is the formation of von Karman vortex in the vicinity of submerged entry nozzle. The results of laboratory experiments and numerical simulations were compared each other. Both method are a useful tools for modeling of slag entrainment. Great agreement was found between laboratory experiments and numerical simulation carried out using LES WALE model, regarding the shape of the oil and oil entrainment as a result of vortex structures formation. However, in the simulation case using Realizable k-e model, the oil entrainment hasn’t been modeled for the conditions under consideration.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75786944","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: 2

Hot forming limit curves for numerical press hardening simulation of AISI 420C AISI 420C数值压硬化模拟的热成形极限曲线

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3667

B. Behrens, J. Uhe, H. Wester, E. Stockburger

引用次数: 7

THE INFLUENCE OF LASER PROCESSING ON MICROSTRUCTURE AND SELECTED PROPERTIES OF THE DIFFUSION BORONIZED LAYERS PRODUCED ON TOOL STEEL FOR METAL FORMING 激光加工对金属成形用工具钢扩散渗硼层组织和性能的影响

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3481

A. Bartkowska, P. Jurči, M. Hudáková, D. Bartkowski, D. Przestacki, M. Kusý, M. Kuřík

{"title":"THE INFLUENCE OF LASER PROCESSING ON MICROSTRUCTURE AND SELECTED PROPERTIES OF THE DIFFUSION BORONIZED LAYERS PRODUCED ON TOOL STEEL FOR METAL FORMING","authors":"A. Bartkowska, P. Jurči, M. Hudáková, D. Bartkowski, D. Przestacki, M. Kusý, M. Kuřík","doi":"10.37904/metal.2020.3481","DOIUrl":"https://doi.org/10.37904/metal.2020.3481","url":null,"abstract":"The paper presents the study results of microstructure, phase composition, microhardness and wear resistance of Vanadis-6 tool steel after diffusion boriding and laser processing. In this study the diode laser device was used. As a result of diffusion boriding the obtained surface layers were characterized by needlelike microstructure with good cohesion with the substrate but in the subsurface area delamination and porosity could be observed. Therefore the diffusion boronized layer was processed using laser heat treatment. As a result of influence of the laser beam, three zones were obtained. The remelted zone near the surface, next the heat affected zone and finally steel substrate were observed. The newly created microstructure in the remelted zone consisted of boron-martensite eutectic. Microhardness of boronized layer after laser processing in comparison to the one without laser processing was slightly lower and was approx. from 1300 HV0.1 to 1100 HV0.1. It was found that additional advantage of laser processing of boronized layers was the presence of heat affected zone. This led to obtaining a mild microhardness gradient between the surface and the substrate. The boronized layer after laser processing was characterized by higher wear resistance in comparison to one not subjected to this kind of processing.","PeriodicalId":21337,"journal":{"name":"Revue De Metallurgie-cahiers D Informations Techniques","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72531959","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