METAL 2021 Conference Proeedings最新文献_第4页

The effect of quality of aluminum casts on their mechanical properties 铝铸件质量对其力学性能的影响

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4216

K. Kreislová, L. Turek

引用次数: 0

INVESTIGATION OF THE MICROSTRUCTURE AND PROPERTIES OF THE AISI H13 TOOL STEEL TI-MODIFIED POWDER DURING LASER CLADDING PROCESS UNDER NITROGEN 氮激光熔覆aisi h13工具钢钛改性粉末的组织与性能研究

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4132

D. Masaylo, S. Igoshin, A. Popovich

{"title":"INVESTIGATION OF THE MICROSTRUCTURE AND PROPERTIES OF THE AISI H13 TOOL STEEL TI-MODIFIED POWDER DURING LASER CLADDING PROCESS UNDER NITROGEN","authors":"D. Masaylo, S. Igoshin, A. Popovich","doi":"10.37904/metal.2021.4132","DOIUrl":"https://doi.org/10.37904/metal.2021.4132","url":null,"abstract":"Laser cladding (LC) technology allows produce metal-matrix composites from discrete powder materials. Data analysis shows that use of such technology to obtain composite materials with enhanced functional properties is of heightened economical interest. The paper presents the results of research aimed at study the possibility synthesizing dispersion-strengthened steel by hard TiN particles formed during the interaction of elemental Ti powder with N 2 gas. It is added 5 % of VT1-0 titanium powder to the AISI H13 tool steel to form a mechanical mixture. Specimen was synthesized from this mixture on a substrate by laser cladding under nitrogen. Owing to the optical and electron microscopy, X-ray phase analysis as well as microhardness testing it was determined that as a result of synthesis, an alloy of steel with Ti with a lower hardness value is formed compared to the H13 steel deposited in pure form. Uniformly distributed nonmetallic inclusions were found, including titanium nitride in the form of dispersed particles. Thus, it can be concluded that before the titanium powder enters the melt pool, there is not enough temperature and time for diffusion processes with the formation of non-melting TiN particles in the steel matrix. Therefore, this phase is formed from the melt during crystallization. As a result, the high titanium in the form of an alloying element in steel does not lead to the targeted formation of a hardened metal-matrix composite but increases the plastic properties and reduces the quality of track formation during process.","PeriodicalId":266696,"journal":{"name":"METAL 2021 Conference Proeedings","volume":"111 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":"124255592","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 influence of graphite inoculants and wall thickness of the castings from nodular graphite cast iron on the structure and mechanical properties 研究了石墨孕育剂和壁厚对球墨铸铁铸件组织和力学性能的影响

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4074

J. Roučka, V. Kaňa, V. Pernica, Dominika Nyékyová, A. Zadera

引用次数: 0

Sheet metal forging process for thin-walled structures with crossed ribs: process design, simulation and a forming experiment 带交叉肋薄壁结构的钣金锻造工艺:工艺设计、仿真及成形试验

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4112

Bin Feng, J. He, Shu-hui Li, Binting Gu, Zhong-Min Lin

引用次数: 0

Corrosion of low-carbon steel in sodium chloride solution containing a water-soluble fraction of humic acid 低碳钢在含有腐植酸水溶性部分的氯化钠溶液中的腐蚀

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4180

L. Doskočil, Tomáš Horák, Jiří Honč

引用次数: 0

CAVITATION RESISTANT LAYERS FROM CORODUR 65 ALLOY DEPOSITED BY TIG WELDING ON DUPLEX STAINLESS STEEL 用tig焊法在双相不锈钢上沉积coodr 65合金的抗气蚀层

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4135

Daniel Mutașcu, I. Mitelea, I. Bordeasu, I. Uțu, C. Crăciunescu

引用次数: 0

Comparison of Hot Ductility Behavior of microAlloyed Steels with Different B-, Cr-, Ni- and Ti-content 不同B-、Cr-、Ni-和ti含量微合金钢的热塑性性能比较

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4140

M. Gontijo, C. Hoflehner, S. Ilie, J. Six, C. Sommitsch

{"title":"Comparison of Hot Ductility Behavior of microAlloyed Steels with Different B-, Cr-, Ni- and Ti-content","authors":"M. Gontijo, C. Hoflehner, S. Ilie, J. Six, C. Sommitsch","doi":"10.37904/metal.2021.4140","DOIUrl":"https://doi.org/10.37904/metal.2021.4140","url":null,"abstract":"The continuous casting process requires permanent investigation and innovative improvements due to its large application in steel production. A good hot ductility behavior is essential to avoid the formation of defects during slab casting. The behavior of two low alloyed steels, with different compositions in B-, Cr-, Ni- and Ti-content, was compared to understand the features that might bring improvements in hot ductility, and consequently reduce the occurrence of defects. The first alloy investigated presents a low content of all elements and the second has a composition with a higher fraction of the alloying elements referred to. Hot tensile tests after in situ melting of the samples were performed to reveal the hot ductility behavior of the each microalloyed steel. The results of final reduction of area showed a much better ductility of the second steel, alloyed with higher B, Cr, Ni and Ti-content, in comparison to the first. Initial microstructure analysis was performed as a means of better evaluating the effects of the temperatures and strain rate applied in both steels. Furthermore, precipitation kinetics of both steels were calculated using the MatCalc software, determining the expected mean radius, number density and phase fraction of the predicted precipitates. Possible reasons for the changes seen experimentally are discussed based on both, simulations and microstructure analysis.","PeriodicalId":266696,"journal":{"name":"METAL 2021 Conference Proeedings","volume":"39 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":"124670600","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

Technical and economic model of metallurgical equipment for optimization of maintenance 冶金设备维修优化技术经济模型

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4294

H. Špačková, Ivana Barčáková, M. Mensík, Jaroslav Sláčala, J. David, P. Švec

{"title":"Technical and economic model of metallurgical equipment for optimization of maintenance","authors":"H. Špačková, Ivana Barčáková, M. Mensík, Jaroslav Sláčala, J. David, P. Švec","doi":"10.37904/metal.2021.4294","DOIUrl":"https://doi.org/10.37904/metal.2021.4294","url":null,"abstract":"The paper deals with the issue of decision support in maintenance management and its optimization. Today, there are many modern tools and methods to optimize operational operations and maintenance itself. The aim of the paper is to describe the creation of a technical and economic model of metallurgical equipment for the optimization of preventive maintenance. At present, attention is paid mainly to technical parameters, in contrast to economic indicators. Maintenance costs make up a large part of the operating costs of most manufacturing companies. Maintenance is often considered an economic burden, which only consumes considerable funds and does not create any on its own. Based on the reliability analysis of the data obtained in this way, a reliability model of the given production unit will be created, enabling in the on-line mode the prediction of the technical condition of the metallurgical equipment and possibly their defined machine nodes. The application of artificial intelligence methods will create software tools for computer support of organization and maintenance management, for operational production management in connection with systems for spare parts warehouse management, etc. The principle of the model will be demonstrated on the strategy of periodic preventive maintenance. The so-called combined approach will be applied for the solution of the model and the subsequent optimization of maintenance, which means that not only artificial intelligence methods are used to solve a certain problem, but a connection with some other method.","PeriodicalId":266696,"journal":{"name":"METAL 2021 Conference Proeedings","volume":"77 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":"128382082","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

aNTI BREAK – OUT systEm FOR CONTINOUSES CASTING MACHINE IN INDUSTRY 4.0 工业4.0中连铸机的防爆裂系统

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4279

Miroslav Klus, Ondrej Kozinski, Petra Svobodová, Antonin Tomecek

{"title":"aNTI BREAK – OUT systEm FOR CONTINOUSES CASTING MACHINE IN INDUSTRY 4.0","authors":"Miroslav Klus, Ondrej Kozinski, Petra Svobodová, Antonin Tomecek","doi":"10.37904/metal.2021.4279","DOIUrl":"https://doi.org/10.37904/metal.2021.4279","url":null,"abstract":"The changing face of industry is increasingly loading automation. The fourth industrial revolution is a sign for the current trend of modernization and automation of individual workplaces and equipment. As part of the modernization of the continuous casting machine No. 1 (ZPO1) of Třinecké železárny, a. s., (TŽ), the electromechanical oscillating mechanism has been recently replaced by a modern hydraulic oscillating mechanism from Danieli. However, due to the implemented modernization interventions, it was necessary to address other important aspects associated with the control of continuous casting technology, such as the functionality of anti-breakout system (so-called DGS) which was based in 2000 on the analysis of a digital signal from the cardan shaft to change the time shifts of the frequency of the oscillating mechanism. This signal, by switching to the new hydraulic cylinder drive technology, was no longer available for calculation in breakout prediction system, and therefore it was necessary to develop a new way of evaluating the breakout alarm called ABS. At the same time, however, new possibilities have emerged to further develop the continuous casting management process to meet the requirements of the Industry 4.0 concept. The new prediction system is currently based on friction force change in hydraulic cylinder. Friction coefficient is directly calculated, from analogue signals coming from hydraulic oscillation machine. The evaluation criteria are automatically set according to steel grades.","PeriodicalId":266696,"journal":{"name":"METAL 2021 Conference Proeedings","volume":"41 2 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":"128483246","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

Nitriding of Nimonic 80 A alloy for improving cavitation erosion resistance 提高Nimonic 80a合金抗空化蚀性能的渗氮研究

METAL 2021 Conference Proeedings Pub Date : 1900-01-01 DOI: 10.37904/metal.2021.4218

C. Belin, I. Mitelea, I. Bordeasu, I. Uțu, C. Crăciunescu

引用次数: 0