METAL 2020 Conference Proeedings最新文献_第6页

Potential of thermal sprayed technologies for maintenance and repair of conventional and nuclear power plants components 热喷涂技术在维护和修理常规和核电站部件方面的潜力

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3541

Š. Houdková, Z. Česánek, P. Šulcová, A. Keslová, K. Lencová, J. Duliškovič

{"title":"Potential of thermal sprayed technologies for maintenance and repair of conventional and nuclear power plants components","authors":"Š. Houdková, Z. Česánek, P. Šulcová, A. Keslová, K. Lencová, J. Duliškovič","doi":"10.37904/metal.2020.3541","DOIUrl":"https://doi.org/10.37904/metal.2020.3541","url":null,"abstract":"The thermal spray technologies are versatile methods of deposition of thick coatings on the components surfaces. Based on spraying technology principle, various materials and coating thicknesses can be deposited. Some spraying technologies, as mobile systems, have the capability to be used directly on-site. Typically, the Twin Wire Arc Spraying systems (TWAS) are utilized to spray the large-scale constructions to protect them from corrosion. Also, one of the latest spraying technologies, Cold Spray, is nowadays being developed to serve as mobile system. Both technologies offer the possibility to spray coatings up to several millimeters thick, which makes them suitable for renovation of worn or corroded material in higher volumes. In the manuscript, the used methods and results achieved so far in the frame of National Center for Energy, are presented and compared with respect to the relationships between coatings microstructure, mechanical and functional properties. Both technologies proved its potential to deposit protective coatings, applied on conventional and nuclear power plants components.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"07 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80240232","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

THE USE OF THE PARETO-LORENZ DIAGRAM FOR QUAlitative ANALYSIS OF STEEL RIMS 利用帕累托-洛伦兹图对钢圈进行定性分析

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3660

R. Caban

{"title":"THE USE OF THE PARETO-LORENZ DIAGRAM FOR QUAlitative ANALYSIS OF STEEL RIMS","authors":"R. Caban","doi":"10.37904/metal.2020.3660","DOIUrl":"https://doi.org/10.37904/metal.2020.3660","url":null,"abstract":"One of the most commonly used methods of quality management in manufacturing and industrial enterprises is the Pareto-Lorenz analysis. This method is currently one of the most frequently used conventional tools for the improvement the product quality and processes. It is a very useful tool used in the analysis of a production or service processes that generate variables that can be categorized. The Pareto-Lorenz chart is a graphical representation of the frequency of the causes of the problem (graph in the form of a bar graph) and their cumulative values (Lorenz curve). The impact of Pareto analysis on product quality occurs mainly through the analysis of the frequency and significance of non-compliance, elimination of quality problems occurring in the enterprise most often and elimination of quality problems generating the highest costs. The purpose of the work was to analyse the quality of steel wheels manufactured by one of the companies in Poland. Steel wheels are standard equipment on cars. Their biggest advantage is durability, both mechanical and chemical. As a result of the analysis, three main causes of steel rims complaints were identified. These are edge bumps, damaged coating (splinters) and material defects. The identified causes represent a good starting point for works aimed to propose concrete preventive actions which, if implemented, should reduce the number of occurrences of certain types of defects without the need for expensive large-scale actions.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83662647","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: 1

Research of TRIP Steel Mechanical Properties under Conditions of Plane Shear Stress TRIP钢在平面剪切应力条件下的力学性能研究

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3495

David Koreček, P. Solfronk, J. Sobotka

引用次数: 0

MATERIAL SECURITY OF LOW CARBON WIRE SUPPLY CHAINS IN THE CZECH REPUBLIC IN SELECTED FIELDS OF METALLURGICAL PRODUCTION 捷克共和国在冶金生产选定领域的低碳电线供应链的材料安全

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3646

Iveta Kuchtíčková, Václav Nétek, J. Drápala, T. Němec, Nikola Němcová

引用次数: 0

DEFORMATION OF BIMETALLIC WIRE DURING COMBINED ECAP-DRAWING 双金属丝在组合盖拉拔过程中的变形

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3469

I. Volokitina, A. Volokitin, A. Naizabekov, S. Lezhnev, Yevgeniy Panin

{"title":"DEFORMATION OF BIMETALLIC WIRE DURING COMBINED ECAP-DRAWING","authors":"I. Volokitina, A. Volokitin, A. Naizabekov, S. Lezhnev, Yevgeniy Panin","doi":"10.37904/metal.2020.3469","DOIUrl":"https://doi.org/10.37904/metal.2020.3469","url":null,"abstract":"In modern industry the most urgent problem is to increase the physical and mechanical properties of metal materials. One of the promising ways to improve such properties is to grind the elements of the grain structure to an ultrafine-grained (UFG) state. From all methods used to produce metal materials with ultrafine-grained structures, the most commonly severe plastic deformation (SPD) methods are used. Most of the currently existing methods of the SPD implementation have not been used in the real industrial sector due to the existing in this method of deformation of the disadvantage, which is the discreteness, i.e. the inability to process products of relatively long length and the need for a large number of processing cycles. And this determines the economic inexpediency of the introduction of this method in production. To solve these problems, technology of combined deformation “ECAP-drawing” have been developed. This work is aimed to investigation of bimetallic wire deformation during combined ECAP-drawing. Results of strain state study showed that layers of materials in the cross-section of wire have received different values of strain. Stress state of both materials is various in both deformation zones - in the ECAP matrix deformation area is divided for two sections (tension and compression) separated by diagonal. At all deformation stages the level of compressive stresses is much higher of tensile stresses.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78338464","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

Grain refinement in hypereutectoid steel by semi-solid processing followed by mechanical working 半固态加工后机械加工对过共析钢的晶粒细化

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3473

K. Rubešová, M. Peković, H. Jirková, D. Hradil

{"title":"Grain refinement in hypereutectoid steel by semi-solid processing followed by mechanical working","authors":"K. Rubešová, M. Peković, H. Jirková, D. Hradil","doi":"10.37904/metal.2020.3473","DOIUrl":"https://doi.org/10.37904/metal.2020.3473","url":null,"abstract":"Research into new forming methods has yielded new techniques of altering the microstructure in hypereutectoid steels. An innovative approach to processing can lead to improved mechanical properties thanks to elimination of problematic and undesirable sharp-edged carbides which are very difficult to dissolve. This paper explores an unconventional method of refining the grain in and removing primary sharp-edged chromium carbides from X210Cr12 hypereutectoid tool steel. The process route applied to input stock comprised semi-solid processing followed by forming below the solidus temperature. The goal of the study was to determine the impact of the applied strain on microstructural evolution and grain refinement. In these experiments, the material was heated to above the solidus temperature and then either cooled without any other intervention or cooled to a forming temperature and then formed using five to ten deformation steps. Higher number of deformation steps led to much finer microstructure and higher hardness which increased from the initial 673 HV10 to 873 HV10. This procedure produced a very fine microstructure with grains of approximately 1 µm and a fine dispersion of chromium carbides. Since the resulting material was very hard and brittle, it had to be tempered. Tempering was performed once at 300°C for 1 hour or twice at 530°C, for 1 hour in each operation.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"1 2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78495030","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

Resilient Metallurgical supplier management – research and practice gap 弹性冶金供应商管理——研究与实践差距

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3664

Eva Donociková, R. Lenort

引用次数: 0

The influence of technological parameters as the handling and sintering process on the structure of iron based powders 研究了处理、烧结等工艺参数对铁基粉末结构的影响

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3626

A. Stanula, W. Pilarczyk, Mark Jager, T. Wilk

引用次数: 0

INFLUENCE OF PLASMA ELECTROLYTIC HARDENING ON THE STRUCTURE AND PROPERTIES OF 20Cr2Ni4A STEEL 等离子体电解硬化对20Cr2Ni4A钢组织和性能的影响

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3508

B. Rakhadilov, Z. Satbayeva, Zhuldyz Sagdoldina, R. Kozhanova

引用次数: 0

EFFECT OF NaNO3, NaClO3 AND TiO2 ON MECHANICAL PROPERTIES AlSi7Mg ALLOY NaNO3、NaClO3和TiO2对AlSi7Mg合金力学性能的影响

METAL 2020 Conference Proeedings Pub Date : 2020-01-01 DOI: 10.37904/metal.2020.3627

T. Lipiński, D. Karpisz

{"title":"EFFECT OF NaNO3, NaClO3 AND TiO2 ON MECHANICAL PROPERTIES AlSi7Mg ALLOY","authors":"T. Lipiński, D. Karpisz","doi":"10.37904/metal.2020.3627","DOIUrl":"https://doi.org/10.37904/metal.2020.3627","url":null,"abstract":"Hypo-eutectic silumins are used in a wide range of industrial applications, but their properties are continuously studied to improve the quality of cast products. The initial structure of AlSi9Mg alloy is composed of granular and acicular β phase, with α phase as matrix. The hard, irregular, often pointed β phase is responsible for the poor mechanical properties of said alloy. This composition is responsible for the alloy's low strength parameters, and it limits the extent of practical applications. The properties of alloys may not only depend on the chemical composition, modifiers, but may also depend on the conditions of the modification effect. Chemical elements and compounds, both added to the alloy and formed as a result of exothermic reactions, “pass” into the alloy, changing the course of its crystallization. Selection of the mixture components allows – to a degree – to decide about the starting moment of crystallization and change the range of alloy solidification or its individual phases. In the present study, the microstructure and technological properties of silumins were improved through modification with the use a chemical mixture as an exothermic modification. It was found that the exothermic modifier containing NaNO 3 NaClO 3 and TiO 2 exerted the strongest multidirectional refining effect on the studied alloys.","PeriodicalId":18449,"journal":{"name":"METAL 2020 Conference Proeedings","volume":"729 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81847100","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