Revue De Metallurgie-cahiers D Informations Techniques最新文献_第4页

MODELING of static recrystallization IN alloyed austenite with account of recovery 考虑恢复的IN合金奥氏体静态再结晶建模

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3511

A. Vasilyev, S. Sokolov, D. Sokolov, A. Zisman

引用次数: 0

The importance of ore raw materials basicity in terms of their comprehensive quality evaluation 矿石原料碱度在其综合质量评价中的重要性

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3644

P. Besta, L. Luzar

{"title":"The importance of ore raw materials basicity in terms of their comprehensive quality evaluation","authors":"P. Besta, L. Luzar","doi":"10.37904/metal.2020.3644","DOIUrl":"https://doi.org/10.37904/metal.2020.3644","url":null,"abstract":"Basicity is one of the key chemical criteria in evaluating the properties of ore raw materials. The alkaline character of the blast furnace charge affects the efficiency of the iron production process in the blast furnace. The basicity of the raw ore material also affects the cost of the process, which may require additional basic additives. However, raw ore materials can be evaluated according to a range of criteria, which may be physical, chemical, economic or technological in character. In each category, many other criteria can be identified. Metallurgical companies have long endured problems in selecting suitable raw ore types and other input sources. Complications generally arise because of the wide spectrum of criteria, but also their varying character, which is difficult to uniformly assess. The range of criteria can be evaluated in categorically different units, which is then difficult to compare at an overall level. The significance and influence of basicity in relation to other key criteria in assessing ores was experimentally assessed in this research. The overall quality of the selected ores was also assessed under this task. Ore quality was analysed according to key criteria, which vary in character. Research was conducted at the company TŘINECKÉ ŽELEZÁRNY, a.s. The article discusses the results of research on the significance of basicity in the assessment criteria structure for ores and demonstrates the possibility of assessing ores using mathematical tools.","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":"85474197","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

INFLUENCE OF MODIFICATION ON MICROSTRUCTURE DEGRADATION OF AlSi12 ALLOY EXPOSED TO THE CORROSION ENVIRONMENT 改性对腐蚀环境下AlSi12合金组织退化的影响

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3596

Franjo Kozina, Zdenka Zovko Brodarac

{"title":"INFLUENCE OF MODIFICATION ON MICROSTRUCTURE DEGRADATION OF AlSi12 ALLOY EXPOSED TO THE CORROSION ENVIRONMENT","authors":"Franjo Kozina, Zdenka Zovko Brodarac","doi":"10.37904/metal.2020.3596","DOIUrl":"https://doi.org/10.37904/metal.2020.3596","url":null,"abstract":"The corrosion resistance of aluminum-silicon (Al-Si) foundry alloys is a result of microstructure development influenced by melt treatment and solidification. As a part of the main eutectic (αAl + βSi), βSi particles are cathodic with respect to the αAl matrix enabling micro-galvanic couple formation and localized corrosion. Despite its high polarization and low current density, increase in the eutectic (αAl + βSi) will contribute to the microstructure degradation of an alloy in corrosive environment. The research was performed in order to estimate the influence of eutectic βSi particles size on the microstructure degradation of AlSi12 alloy with mixed morphology of eutectic (αAl + βSi). The results of light microscopy indicated preferred initiation and progress of cavities involving modified eutectic (αAl + βSi) with eutectic βSi particles of smaller average particle size. The unmodified eutectic (αAl + βSi) with lamellar morphology and dendrites of primary αAl phase were not visually affected by degradation. The average cavity size and pH value of the solution increase with the increasing exposure time, while microstructure degradation rate decreases.","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":"80525215","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

Influence of quasi-continuous ECAP with various channel intersection angles on the structure formation, mechanical and functional properties of Ti-Ni shape memory alloys 不同通道交会角准连续ECAP对Ti-Ni形状记忆合金结构形成、力学和功能性能的影响

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3624

R. Karelin, I. Khmelevskaya, V. Komarov, V. Andreev, M. Perkas, V. Yusupov, S. Prokoshkin

{"title":"Influence of quasi-continuous ECAP with various channel intersection angles on the structure formation, mechanical and functional properties of Ti-Ni shape memory alloys","authors":"R. Karelin, I. Khmelevskaya, V. Komarov, V. Andreev, M. Perkas, V. Yusupov, S. Prokoshkin","doi":"10.37904/metal.2020.3624","DOIUrl":"https://doi.org/10.37904/metal.2020.3624","url":null,"abstract":"Influence of quasi-continuous ECAP with channel intersection angles of 110 and 120° on the structure formation and properties of Ti-50.1 at% Ni shape memory alloy was studied and compared. The structure was studied using X-ray diffraction analyses and transmission electron microscopy. The mechanical properties were determined by the uniaxial tensile and hardness tests. The maximum completely recoverable strain and temperatures of reverse martensitic transformation were estimated by a thermomechanical method using a bending mode for strain inducing. After ECAP with channel intersection angle of 120° for 3 passes at 400 °C a mixed ultrafine-grained structure with high density of free dislocations and incompletely equiaxed structural elements size of about 130-150 nm is formed. In comparison, after ECAP with channel intersection angle of 110° an ultrafine-grained structure with deformation bands elongated in the direction perpendicular to the sample axis, consisting of the less uniform equiaxed and ellipsoid structural elements with the size of about 50-150 nm is obtained. After both studied ECAP regimes samples have relatively high values of hardness (220 HV) and strength characteristics (σy = 850/1000 MPa, σB = 1040/1020 MPa, 120/110°). Maximum completely recoverable strain of 7.1 % is obtained after ECAP with channel intersection angle of 110°, and post-deformation annealing at 400 °C, 1 h.","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":"83145152","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

In-situ synthesis Ni-Ti alloy by laser cladding 激光熔覆原位合成ni -钛合金

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3519

S. Igoshin, D. Masaylo, A. Kim, A. Popovich

引用次数: 1

IMPROVEMENT OF STEEL SHEETS’ CORROSION RESISTANCE BY APPLICATION OF NEW GENERATION COATINGS 应用新一代涂料提高钢板的耐蚀性

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3546

E. Evin, M. Tomáš, J. Kepič

引用次数: 1

Resistance spot weldability of TBF steel sheets with dissimilar thickness 不同厚度TBF钢板的电阻点焊性

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.1051/metal/2020071

Imren Ozturk Yilmaz, Abdullah Yasin Bilici, H. Aydın

{"title":"Resistance spot weldability of TBF steel sheets with dissimilar thickness","authors":"Imren Ozturk Yilmaz, Abdullah Yasin Bilici, H. Aydın","doi":"10.1051/metal/2020071","DOIUrl":"https://doi.org/10.1051/metal/2020071","url":null,"abstract":"This paper presents an experimental study on weldability of TBF steel sheets with dissimilar thickness. Nominal thickness of TBF sheets were 0.95 and 1.55 mm. Optical microscope was used to observe the cracks formed in the weld zone. The indentation depths were determined by ultrasonic technique. Tensile shear tests were applied to the welded specimens in order to determine the mechanical properties. Higher weld current and time resulted in higher nugget size and indentation depth. This increase in nugget size and indentation depth with increasing of weld current and weld time was almost linearly. The liquid metal embrittlement crack sensitivity in the HAZ was very high on TBF spot welds. The liquid metal embrittlement cracks were much deeper and wider along the weld periphery regions compared to the nugget regions. These cracks were occurred easily with a higher heat input and the crack depth increased almost linearly with increasing of heat input. Weld strength of the specimens was governed by crack formation in the HAZ. Lower weld currents and weld times resulted in higher tensile shear properties. The highest tensile shear load (18.50 kN) and energy absorption (37.5 J) were achieved at 6 kA for 20 cycles. This weld exhibited interfacial failure mode.","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":"82830303","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

Effect of holding time at stabilization annealing on properties of 08CH18N10T austenitic stainless steel 稳定化退火保温时间对08CH18N10T奥氏体不锈钢性能的影响

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3498

H. Jirková, T. Janda, J. Růžička, J. Mach, J. Volkmannová

{"title":"Effect of holding time at stabilization annealing on properties of 08CH18N10T austenitic stainless steel","authors":"H. Jirková, T. Janda, J. Růžička, J. Mach, J. Volkmannová","doi":"10.37904/metal.2020.3498","DOIUrl":"https://doi.org/10.37904/metal.2020.3498","url":null,"abstract":"Titanium-stabilized austenitic stainless steel 08Ch18N10T is often used in nuclear power facilities due to its favourable properties. Many parts of the primary circuit of VVER 440 and VVER 1000-type nuclear power plants are manufactured of this steel. This means that the material must possess very good corrosion resistance and thermal stability of structure. Yield strength of at least 177 MPa at 350 °C is required. Heat treatment of this steel comprises several important stages which affect the resulting mechanical properties. In particular, the solution and stabilization annealing after forging or rolling are time and energy consuming. Therefore, various ways to optimize these processes are being sought. A combination of solution annealing at 1020 °C for 15 and 30 minutes and stabilization annealing at 720 °C with dwell of 2.5 hours to 15 hours was tested on 08Ch18N10 steel samples. The aim was to establish the effects of stabilization annealing and solution annealing times on mechanical properties. Longer solution annealing has a pronounced effect on the reduction of scatter in mechanical properties. All annealing routes led to yield strengths at 350 °C higher than 200 MPa and tensile strengths of more than 380 MPa.","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":"90950230","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

DEVELOPMENT OF TECHNICAL SOLUTIONS FOR PREVENTING DISCHARGE OF LIQUID TECHNOGENIC WASTE AT ENTERPRISES USING SURVIVAL PROCESSING PROCESSES 开发企业生存处理工艺防止工艺废水排放的技术解决方案

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3589

A. Kolesnikov, T. V. Davydkova

引用次数: 0

Research on flow rate engineering calculation model of U-pipes for fabricating transverse variable profiled (TVP) strips by simulation and experiment 通过仿真和实验研究了制造横向变型带用u型管的流量工程计算模型

Revue De Metallurgie-cahiers D Informations Techniques Pub Date : 2020-01-01 DOI: 10.1051/metal/2020057

Ce Ji, Hua-gui Huang, Yifeng Sun, C. Zhang, G. Lin, Zhang Shangbin

{"title":"Research on flow rate engineering calculation model of U-pipes for fabricating transverse variable profiled (TVP) strips by simulation and experiment","authors":"Ce Ji, Hua-gui Huang, Yifeng Sun, C. Zhang, G. Lin, Zhang Shangbin","doi":"10.1051/metal/2020057","DOIUrl":"https://doi.org/10.1051/metal/2020057","url":null,"abstract":"Transverse variable profiled (TVP) strips have significant lightweight and functional characteristics due to the nonuniform section, but need to be cooled nonuniformly in order to obtain the uniform microstructure and performance. Hence, it has become the consensus of the industry to develop new on-line cooling equipment that can adjust and control the cooling capacity along the width direction (WD). Therefore, a multi-functional test platform was designed based on the U-pipes used in the industrial runout table cooling process. A steady-state Computational Fluid Dynamics (CFD) model was built based on the Fluent software, and the influence of the main pipe inlet pressure, U-pipe inner diameter, restrictor ring thickness, and restrictor ring inner diameter was analyzed. The results indicate that the flow rate increases as the U-pipe inner diameter increase when there is no restrictor ring, and the result is contrary when there is a restrictor ring. The influence of main pipe inlet pressure, restrictor ring thickness, and restrictor ring inner diameter on the flow rate is monotonic. Besides, the restrictor ring inner diameter has a wide flow rate adjusting range and has little impact on the equipment structure, which helps to reduce the reconstruction cost. Finally, considering the influence of geometric parameters, the flow rate engineering calculation models of the U-pipe were derived and verified, which lays the theoretical foundation to customize the flow rate distribution along the WD at the design stage.","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":"89994466","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