METAL 2021 Conference Proeedings最新文献_第5页

THE ASSESSMENT OF EFFECTIVENESS OF BLAST FURNACE USING PAMCO METHOD 用pamco法评价高炉的有效性

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4304

E. Kardas, Andrzej Skowronek

引用次数: 0

IMPROVING THE PRODUCTIVITY OF OPERATION OF ROTARY FURNACES USING THE TPM METHOD 运用TPM方法提高转炉的生产效率

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4293

E. Michlowicz, Tomasz Korfel

引用次数: 0

Effects of heat treatment on microstructure and properties of selective laser melted titanium aluminide alloy 热处理对选择性激光熔化钛铝合金组织和性能的影响

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4076

I. Polozov, Artem Kantyukov, K. Starikov, A. Gracheva, V. Popovich, A. Popovich

引用次数: 1

Application of digital microscope for prediction of surface quality of castings 数码显微镜在铸件表面质量预测中的应用

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4200

T. Obzina, J. Beňo, V. Merta, P. Lichý, Klára Drobikova

引用次数: 0

Comparative study of fluoride conversion coating structure on two types of bulk magnesium materials 两种块状镁材料氟化物转化涂层结构的比较研究

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4201

R. Brescher, M. Březina, Juliána Dziková, J. Wasserbauer, Ján Staněk

{"title":"Comparative study of fluoride conversion coating structure on two types of bulk magnesium materials","authors":"R. Brescher, M. Březina, Juliána Dziková, J. Wasserbauer, Ján Staněk","doi":"10.37904/metal.2021.4201","DOIUrl":"https://doi.org/10.37904/metal.2021.4201","url":null,"abstract":"This paper deals with the structural and composition differences of two types of fluoride conversion coatings on two types of bulk magnesium materials. The bulk magnesium materials used were powder metallurgy cold compacted magnesium and sintered magnesium materials. One type of coating was prepared by dipping the magnesium samples in hydrofluoric acid and the second one by immersing the samples in Na[BF 4 ] molten salt. Microstructure and elemental composition were examined by scanning electron microscope equipped with an EDS analyzer. The phase composition was analyzed using an XRD. The fluoride conversion coating prepared from Na[BF 4 ] molten salt grew significantly deeper into the cold compacted magnesium than to the sintered material. Also, traces of fluorine were found inside the bulk of cold compacted material, while no fluorine traces were found inside the sintered material. The coating prepared from hydrofluoric acid appeared the same in both magnesium materials, with similar depth and fluorine traces found inside the bulk of both of the materials. Furthermore, the coating prepared from Na[BF 4 ] molten salt grew deeper into the material than the coating prepared from hydrofluoric acid. The differences between the two coatings in creation depth, structures, and layout of fluorine inside the material suggest a difference in the creation mechanism of the two coatings.","PeriodicalId":266696,"journal":{"name":"METAL 2021 Conference Proeedings","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132969211","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 Structure on Formability of Stainless Steels used at Production of Exhaust Components 结构对排气部件用不锈钢成形性能的影响

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4107

J. Sobotka, P. Solfronk, M. Švec, David Koreček

{"title":"Influence of Structure on Formability of Stainless Steels used at Production of Exhaust Components","authors":"J. Sobotka, P. Solfronk, M. Švec, David Koreček","doi":"10.37904/metal.2021.4107","DOIUrl":"https://doi.org/10.37904/metal.2021.4107","url":null,"abstract":"Stainless steels are nowadays used in a wide range of industrial products. One example of their utilization in the industrial practice represents production of the exhaust systems components in the automotive industry. Corrosion-resistant materials intended to be processed by the forming technologies generally reveal very good deformation properties and high mechanical values as well. These properties are given mainly due to the high content of alloying elements, stability of the chemical composition and production technology. The submitted paper evaluates the influence of structure on the formability of two stainless steels 1.4301 (designation acc. to EN 10028-7-2016) used for production the exhaust system components. Each of the tested stainless steels is supplied by a different manufacturer. Despite the declared identical chemical composition and the same mechanical properties, one of the tested materials showed quite high level of scrap production. As a critical point of the production there was identified the cutting operation in combination with the subsequent expansion of the cut hole. During this operation, a massive crack occurred in one of the tested materials in the circumferential part of flange. Moreover, the crack always occurred in the identical location of the product. Own formability evaluation was assessed by means of a static tensile test and structural analysis performed on a TESCAN MIRA 3 electron microscope. In addition to these tests, a hole expansion test with different adjustment of cutting clearance was also performed. Based upon the measured data, there were formulated conclusions regarding the causes of cracking in the case of one tested corrosion-resistant material designed for production the exhaust components.","PeriodicalId":266696,"journal":{"name":"METAL 2021 Conference Proeedings","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131885345","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

On wetting of dense alumina substrate by low alloy steel containing oxygen 含氧低合金钢润湿致密氧化铝基体的研究

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4078

V. Novák, L. Řeháčková, S. Rosypalová, D. Matýsek, B. Smetana, M. Tkadlečková, M. Sniegoň, P. Váňová, K. Konečná, Ľ. Drozdová

{"title":"On wetting of dense alumina substrate by low alloy steel containing oxygen","authors":"V. Novák, L. Řeháčková, S. Rosypalová, D. Matýsek, B. Smetana, M. Tkadlečková, M. Sniegoň, P. Váňová, K. Konečná, Ľ. Drozdová","doi":"10.37904/metal.2021.4078","DOIUrl":"https://doi.org/10.37904/metal.2021.4078","url":null,"abstract":"This investigation was carried out to determine the wetting characteristics of low alloy steel grades that contained, among other elements, chromium around 5 wt.% and oxygen up to approximately 400 ppm. The tests were performed from the melting temperature to a temperature of 1,600 °C using a high-temperature observation furnace CLASIC operating under non-oxidizing conditions. The influence of oxygen on the examined steel's wetting behavior, i.e., the temperature dependence of surface tension and wetting angle, was found and verified by statistical analysis using the Kruskal-Wallis test. In addition, the phase transition temperatures, ascertained from DTA measurements, were in strong correlation with those theoretically calculated. To provide better insight into the wetting mechanism, SEM/EDX analyses of the wetted alumina surface and of the vertical cross-section of the steel/alumina interface were made using a scanning electron microscope (SEM) JEOL 6490 LV. Beyond the mentioned techniques, the study was accompanied by calculations performed in FactSage oxide database.","PeriodicalId":266696,"journal":{"name":"METAL 2021 Conference Proeedings","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126103393","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

Calculation of phase diagrams and the effect of lattice parameters on the high-entropy carbides single-phase solid solutions formation 相图计算及晶格参数对高熵碳化物单相固溶体形成的影响

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4270

T. Makhmutov, N. Razumov, A. Popovich

引用次数: 0

modelING iMPACT TOUGHNESS OF INDUSTRIAL HOT ROLLED HSLA STEELS 模拟工业热轧HSLA钢的冲击韧性

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4131

A. Vasilyev, Dmitry Sokolov, S. Sokolov

引用次数: 0

optimization Possibilities of properties of niti alloys used as traumatology implants 镍钛合金创伤植入材料性能的优化

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4271

M. Kopelent, M. Losertová, M. Štencek, K. Konečná, B. Smetana, J. Drápala

{"title":"optimization Possibilities of properties of niti alloys used as traumatology implants","authors":"M. Kopelent, M. Losertová, M. Štencek, K. Konečná, B. Smetana, J. Drápala","doi":"10.37904/metal.2021.4271","DOIUrl":"https://doi.org/10.37904/metal.2021.4271","url":null,"abstract":"Shape memory alloy represents metallic material that can return to its original forms, shapes, or sizes when subjected to a process of memorization between two transformation phases. The basic application of these materials is always simple, i.e. where the material can be easily deformed by an external force and will recover its original forms when heated at a certain temperature. NiTi alloy is mainly characterized by its special properties, namely the shape memory effect and superelastic behavior, as well as the excellent corrosion resistance, high strength, low modulus of elasticity and biocompatibility. Due to its superelasticity, NiTi resembles to some human rigid tissues, including bones and tendons that enables its using in implants or tools for many medical cases in orthopedics, neurology, cardiology, interventional radiology, endodontics, etc. In this work, the effect of thermal treatment on physical-metallurgical properties of NiTi alloy was studied. Flat samples of NiTi alloy with a composition of 50.6 at% Ni and 49.4 at% Ti were solution treated at 850 °C and subsequently aged at 450 °C. The microstructures in as-received, solution treated or solution treated and aged stages were examined by means of optical or scanning electron microscopies. The analysis of the heat treatment effect on the microstructure and transformation temperatures was completed by Vickers microhardness measurement and by differential scanning calorimetry.","PeriodicalId":266696,"journal":{"name":"METAL 2021 Conference Proeedings","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122900455","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