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Effect of Methyl Silicone Oil to Moisture Resistance of Sodium Silicate Sands by Microwave Hardening 甲基硅油对微波硬化硅酸钠砂耐湿性的影响
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2022.140215
{"title":"Effect of Methyl Silicone Oil to Moisture Resistance of Sodium Silicate Sands by Microwave Hardening","authors":"","doi":"10.24425/afe.2022.140215","DOIUrl":"https://doi.org/10.24425/afe.2022.140215","url":null,"abstract":"The sodium silicate sands hardened by microwave have the advantages of high strength, fast hardening speed and low residual strength with the lower addition of sodium silicate. However, the sodium ion in the sands will absorb moisture from the atmosphere, which would lead to lower storing strength, so the protection of a bonding bridge of sodium silicate between the sands is crucial. Methyl silicone oil is a cheap hydrophobic industrial raw material. The influence of the addition amount of methyl silicone oil modifier on compressive strength and moisture absorption of sodium silicate sands was studied in this work. The microscopic analysis of modified before and after sodium silicate sands has been carried on employing scanning electron microscopy(SEM) and energy spectrum analysis(EDS). The results showed that the strength of modified sodium silicate sands was significantly higher than that of unmodified sodium silicate sands, and the best addition of methyl silicone oil in the quantity of sodium silicate was 15%. It was also found that the bonding bridge of modified sodium silicate sands was the density and the adhesive film was smooth, and the methyl silicone oil was completely covered on the surface of the sodium silicate bonding bridge to protect it.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"409 2‐3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135636576","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
Improvement of Operating Performance of a Cast-Iron Heat Exchanger by Application of a Copper Alloy Coating 应用铜合金涂层改善铸铁换热器的运行性能
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2019.127144
M. Mróz, A.W. Orłowicz, M. Tupaj, M. Jacek-Burek, M. Radoń, M. Kawiński
{"title":"Improvement of Operating Performance of a Cast-Iron Heat Exchanger by Application of a Copper Alloy Coating","authors":"M. Mróz, A.W. Orłowicz, M. Tupaj, M. Jacek-Burek, M. Radoń, M. Kawiński","doi":"10.24425/afe.2019.127144","DOIUrl":"https://doi.org/10.24425/afe.2019.127144","url":null,"abstract":"The paper deals with possibility to improve operating performance of cast-iron heat exchangers by providing them with a copper alloy (CuTi2Cr) with the use of the flame spraying method. A test exchanger was cast of a gray cast iron with vermicular graphite in ferritic-pearlitic matrix obtained in production conditions at KAW-MET Iron Foundry with the wire method used to vermicularize the material. The test samples were two plates cast in sand molds, of which one was given a flame-sprayed CuTi2Cr coat on one side. The operating performance of such model cast-iron heat exchangers, with and without CuTi2Cr coating, was tested on a set-up for determining the heat flow rate (thermal power) transferred by the heat exchanger to environment. The obtained results indicate that the value of the heat flow rate characterizing the CuTi2Cr-coated cast-iron heat exchanger was by 10% higher compared to the flow rate of heat conveyed to environment by the heat exchanger without coating.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"1973 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135636761","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
Tribological Characterization of Aluminum/Babbitt Composites and Their Application to Sliding Bearing 铝/巴氏合金复合材料的摩擦学特性及其在滑动轴承上的应用
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2020.133326
{"title":"Tribological Characterization of Aluminum/Babbitt Composites and Their Application to Sliding Bearing","authors":"","doi":"10.24425/afe.2020.133326","DOIUrl":"https://doi.org/10.24425/afe.2020.133326","url":null,"abstract":"The present work studies the tribological properties of new hybrid material composed from high porosity open cell aluminum alloy (AlSi10Mg) skeleton and B83 babbitt infiltrated into it. The porous skeleton is obtained by replication method applying salt (NaCl) as space holder. The reinforcing phase of the skeleton consists of Al 2 O 3 particles. The skeleton contains Al 2 O 3 particles as reinforcement. The microstructure of the obtained materials is observed and the tribological properties are determined. A comparison between tribological properties of nominally nonporous aluminum alloy, high porosity open cell skeleton, babbitt alloy and the hybrid material is presented. It is concluded that new hybrid material has high wear resistivity and is a promising material for sliding bearings and other machine elements with high wear resistivity.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"418 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135636820","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
Gas Blowing Ultrasonic Aluminium Degassing Assessment with the Reduced Pressure Test (RPT) Method 用减压试验(RPT)方法评价气吹超声铝脱气
IF 0.6
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/AFE.2020.131312
H. Galarraga, M. G. Cortázar, E. Arregi, A. Artola, J. L. Oncala, Mikel Merchán-Zubieta
{"title":"Gas Blowing Ultrasonic Aluminium Degassing Assessment with the Reduced Pressure Test (RPT) Method","authors":"H. Galarraga, M. G. Cortázar, E. Arregi, A. Artola, J. L. Oncala, Mikel Merchán-Zubieta","doi":"10.24425/AFE.2020.131312","DOIUrl":"https://doi.org/10.24425/AFE.2020.131312","url":null,"abstract":"This work has been done within the AL-STRUC project supported by the ELKARTEK program of the Basque Government under Grant KK-2017/00020.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68944439","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
Ferrous Metallurgy Production in Russia: How Will the COVID-19 Pandemic Affect? 俄罗斯黑色冶金生产：新冠肺炎疫情将如何影响？
IF 0.6
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2021.138667
S. Golubev, V. Sekerin, A. Gorokhova, D. Shevchenko, A. Gusov
{"title":"Ferrous Metallurgy Production in Russia: How Will the COVID-19 Pandemic Affect?","authors":"S. Golubev, V. Sekerin, A. Gorokhova, D. Shevchenko, A. Gusov","doi":"10.24425/afe.2021.138667","DOIUrl":"https://doi.org/10.24425/afe.2021.138667","url":null,"abstract":"Metallurgy is one of the key industries both in Russia and in the world. It has a significant influence on the situation in related industries. Therefore, the current state analysis of ferrous metallurgy production and its formation based on the short-term technological forecast is essential. Based on the foregoing, the research was aimed at analyzing the current state of ferrous metallurgy production in Russia and the impact of the COVID-19 pandemic on the prospects for industry development in the short term. The research studies the state of the ferrous metallurgy production in Russia and abroad before the COVID-19 pandemic, as well as the volume of industrial production in ferrous metallurgy and the industry structure. The COVID-19 pandemic has triggered a serious global recession, necessitating an analysis of the forecast for the development of the ferrous metallurgy industry. The research concludes that the Russian ferrous metals market is so far affected to a lesser extent compared to the European one.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"21 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68944557","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 silica sand on surface casting quality 硅砂对表面铸件质量的影响
IF 0.6
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/AFE.2019.127107
J. Beňo, Kristina Adamusová, V. Merta, T. Bajer
{"title":"Influence of silica sand on surface casting quality","authors":"J. Beňo, Kristina Adamusová, V. Merta, T. Bajer","doi":"10.24425/AFE.2019.127107","DOIUrl":"https://doi.org/10.24425/AFE.2019.127107","url":null,"abstract":"The current casting production of castings brings increased demands for surface and internal quality of the castings. Important factors, that influence the quality of casted components, are the materials used for the manufacture of moulds and cores. For the preparation and production of moulds and cores, in order to achieve a low level of casting defects, then it used a high quality input materials, including various types of sands, modified binders, additives, etc. However, even the most expensive raw materials are not a guarantee to achieve the quality of production. It is always necessary to choose the appropriate combination of input material together with an appropriate proposal for the way of the production, the metallurgical treatment of cast alloy, etc. The aim of this paper is to establish the basic principles for the selection of the base core mixtures components – sands to eliminate defects from the tension, specifically veining. Various silica sand, which are commonly used in foundries of Middle Europe region, were selected and tested.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68944580","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
Dispersion of Al-Si Alloy Structure by Intensive Pulsed Electron Beam 强脉冲电子束对Al-Si合金结构色散的影响
IF 0.6
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/AFE.2019.127120
S. Konovalov, V. Gromov, D. Zaguliyaev, Y. Ivanov, A. Semin, J. Rubannikova
{"title":"Dispersion of Al-Si Alloy Structure by Intensive Pulsed Electron Beam","authors":"S. Konovalov, V. Gromov, D. Zaguliyaev, Y. Ivanov, A. Semin, J. Rubannikova","doi":"10.24425/AFE.2019.127120","DOIUrl":"https://doi.org/10.24425/AFE.2019.127120","url":null,"abstract":"By the method of modern physical material science (optic microscopy scanning and transmission electron microscopy) the analysis of structural phase states, the morphology of the second phase inclusions and defect substructure of Al-Si alloy (silumin) of hypoeutectic composition, subjected to electron beam processing was done with the following parameters: energy density 25-35 J/cm, beam length 150 μs, pulse number – 3, pulse repetition rate – 0.3 Hz, pressure of residual gas (argon) 0.02 Pa. The surface irradiation results in the melting of the surface layer, the dissolution of boundary inclusions, the stricture formation of high speed cellular crystallization of submicron sizes, the repeated precipitation of the second phase nanodimentional particles. With the increased distance from the irradiation surface the layer containing the second phase inclusions of quasi-equilibrium shape along with the crystallization cells was revealed. It is indicative of the processes of Al-Si alloy structure globalization on electron beam processing.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68944699","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
New Use of Instruments for More Accurate Wax Pattern Blade Segment Production 新型仪器用于更精确的蜡模叶片分段生产
IF 0.6
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/AFE.2019.127124
A. Herman, I. Kubelková, O. Vrátný
{"title":"New Use of Instruments for More Accurate Wax Pattern Blade Segment Production","authors":"A. Herman, I. Kubelková, O. Vrátný","doi":"10.24425/AFE.2019.127124","DOIUrl":"https://doi.org/10.24425/AFE.2019.127124","url":null,"abstract":"Precision casting is currently motivated by high demand especially for castings for the aerospace, automotive and gas turbine industries. High demands on precision of this parts pressure foundries to search for the new tools which can help them to improve the production. One of these tools is the numerical simulation of injection process, whereas such software especially for investment casting wax injection, process does not exist yet and for this case must be the existing software, for alloys or plastic, modified. This paper focuses on the use of numerical simulations to predict the behavior of injected models of gas turbine blades segments. The properties of wax mixtures, which were imported into the Cadmould simulation software as a material model, were found. The results of the simulations were verified using the results of 3D scanning measurements of wax models. As a supporting technology for verifying the results was used the Infrared Thermography.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68944757","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
Evaluation of Collapsibility of Selected Core Systems 选定核心系统的可折叠性评价
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2022.140216
{"title":"Evaluation of Collapsibility of Selected Core Systems","authors":"","doi":"10.24425/afe.2022.140216","DOIUrl":"https://doi.org/10.24425/afe.2022.140216","url":null,"abstract":"There are mainly two different ways of producing sand cores in the industry. The most used is the shooting moulding process. A mixture of sand and binder is injected by compressed air into a cavity (core), where it is then thermally or chemically cured. Another relatively new method of manufacturing cores is the use of 3D printing. The principle is based on the method of local curing of the sand bed. The ability to destroy sand cores after casting can be evaluated by means of tests that are carried out directly on the test core. In most cases, the core is thermally degraded and the mechanical properties before and after thermal exposure are measured. Another possible way to determine the collapsibility of core mixtures can be performed on test castings, where a specific casting is designed for different binder systems. The residual strength is measured by subsequent shake-out or knock-out tests. In this paper, attention will be paid to the collapsibility of core mixtures in aluminium castings","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"12 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135634468","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
Application of Natural and Artificial Ageing on Multiply Remelted AlSi9Cu3 Alloy 自然时效和人工时效在多次重熔AlSi9Cu3合金中的应用
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2019.127117
M. Matejka, D. Bolibruchová
{"title":"Application of Natural and Artificial Ageing on Multiply Remelted AlSi9Cu3 Alloy","authors":"M. Matejka, D. Bolibruchová","doi":"10.24425/afe.2019.127117","DOIUrl":"https://doi.org/10.24425/afe.2019.127117","url":null,"abstract":"This article focuses on the study of the influence of remelting and subsequent natural and artificial ageing on the structure of recycled AlSi9Cu3 alloy with increased iron content. The assessed changes in eutectic silicon and iron-based intermetallic phases were carried out using optical and scanning electron microscopy. The degradation of the eutectic silicon morphology due to remelting occurred only at the highest numbers of remelting. The effect of remelting the investigated alloy, which is accompanied by a gradual increase in wt. % Fe, began to manifest significantly through a change in the length of the ferric phases after the fourth remelting. As expected, the artificial ageing process has proven to be more effective than natural ageing. It has led to a change in the eutectic silicon morphology and has been beneficial in reducing the lengths of adverse ferric phases. The use of alloys with higher numbers of remelting, or with greater “contamination”, for the manufacture of shape-challenging castings is possible when using a suitable method of eliminating the negative factors of the remelting process. The results of our investigation show a suitable method of the above elimination the application of heat treatment T5 – via artificial ageing.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"1986 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135635568","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
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