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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
Research on the Characterization of Ti Inclusions and Their Precipitation Behavior in Tire Cord Steel 轮胎帘子线钢中Ti夹杂物的表征及其析出行为研究
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2019.127135
Jialiu Lei, Dongnan Zhao, Yongjun Fu, Xianfeng Xu
{"title":"Research on the Characterization of Ti Inclusions and Their Precipitation Behavior in Tire Cord Steel","authors":"Jialiu Lei, Dongnan Zhao, Yongjun Fu, Xianfeng Xu","doi":"10.24425/afe.2019.127135","DOIUrl":"https://doi.org/10.24425/afe.2019.127135","url":null,"abstract":"In the present investigation, the morphology of Ti inclusions in high strength tire cord steel was investigated and their precipitation behavior was discussed using a precipitation and growth model. The results show that Ti inclusions mainly exist in the form of TiN. The two-dimensional characterization of Ti inclusions is square-like with sharp edges and corners, while its three-dimensional shape exhibits a cubic or rectangular-prism morphology. The Ti inclusions do not precipitate when the solid fraction of tire cord during solidification is less than 0.987, and their final radius is closely related to the cooling rate and initial concentration product. The higher the cooling speed, the smaller the final radius, when the cooling speed is constant, the final radius of Ti inclusions is mainly determined by the initial concentration product, w[N]0×w[Ti]0. In order to retard the precipitation and growth of Ti inclusions in tire cord steel, the cooling rate and initial concentration product can be taken into consideration.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"1988 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135635833","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
Structural Characterization of Rapidly Solidified Al71Ni24Fe5 Alloy 快速凝固Al71Ni24Fe5合金的组织表征
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2021.138670
{"title":"Structural Characterization of Rapidly Solidified Al71Ni24Fe5 Alloy","authors":"","doi":"10.24425/afe.2021.138670","DOIUrl":"https://doi.org/10.24425/afe.2021.138670","url":null,"abstract":"0 -","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"609 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135636127","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 on the Influence of Vibratory Machining on Titanium Alloys Properties 振动加工对钛合金性能影响的研究
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2020.133329
{"title":"Research on the Influence of Vibratory Machining on Titanium Alloys Properties","authors":"","doi":"10.24425/afe.2020.133329","DOIUrl":"https://doi.org/10.24425/afe.2020.133329","url":null,"abstract":"This article proposes these of vibratory machining to Ti-6Al-4V titanium alloy as finishing treatment. Titanium alloy was used in the aerospace industry, military, metallurgical, automotive and medical processes, extreme sports and other. The three-level three-factor Box-Behnken experiment examined the influence of machining time of vibratory machining, the type of mass finishing media used and the initial state of the surface layer on the mass loss, geometric structure of the surface, micro hardness and the optimal process parameters were determined. Considerations were given the surfaces after milling, after cutting with a band saw and after the sanding process. The experiment used three types of mass finishing media: polyester, porcelain and metal. Duration of vibratory machining treatment was assumed to be 20, 40, 60 minutes. The form profiles before and after vibratory machining were determined with the Talysurf CCI Lite Taylor Hobson optical profiler. Future tests should concern research to carry out tests using abrasive pastes with a larger granulation of abrasive grains, to carry out tests for longer processing times and to determine the time after which the parameters of geometrical structure of the surface change is unnoticeable.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"667 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135636301","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
Fabrication Optimization of Al 7075/Expanded Glass Syntactic Foam by Cold Chamber Die Casting 铝7075/膨胀玻璃复合泡沫的冷室压铸工艺优化
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2020.133339
{"title":"Fabrication Optimization of Al 7075/Expanded Glass Syntactic Foam by Cold Chamber Die Casting","authors":"","doi":"10.24425/afe.2020.133339","DOIUrl":"https://doi.org/10.24425/afe.2020.133339","url":null,"abstract":"Recently, aluminum matrix syntactic foams (AMSFs) have become notably attractive for many different industrial areas like automotive, aerospace, construction and defense. Owing to their low density, good compression response and perfect energy absorption capacity, these advanced composite materials are also considered as strong alternatives to traditional particle reinforced composites and metal foams. This paper presents a promising probability of AMSF fabrication by means of industrial cold chamber die casting method. In this investigation, contrary to other literature studies restricted in laboratory scale, fully equipped custom-build cold chamber die casting machine was used first time and all fabrication steps were designed just as carried out in the real industrial high pressure casting applications. Main casting parameters (casting temperature, injection pressure, piston speed, filler pre-temperature and piston waiting time) were optimized in order to obtain flawless AMSF samples. The density alterations of the syntactic foams were analyzed depending upon increasing process values of injection pressure, piston speed and piston waiting time. In addition, macroscopic and microscopic investigations were performed to comprehend physical properties of fabricated foams. All these efforts showed almost perfect infiltration between filler particles at the optimized injection parameters","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"397 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135636327","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: 6
Strength Properties of Ceramic Moulds Containing Spent Moulding Sand After Initial Reclamation 初始回收后含废型砂陶瓷模具的强度特性
Archives of Foundry Engineering Pub Date : 2023-11-06 DOI: 10.24425/afe.2019.127127
{"title":"Strength Properties of Ceramic Moulds Containing Spent Moulding Sand After Initial Reclamation","authors":"","doi":"10.24425/afe.2019.127127","DOIUrl":"https://doi.org/10.24425/afe.2019.127127","url":null,"abstract":"The results of testing the strength properties of experimental ceramic materials containing spending moulding sand after initial mechanical reclamation as a material for subsequent layers of the stucco composition were presented. Tests were carried out on spent moulding sands from various foundry technologies, i.e. sand with furfuryl resin and sand with hydrated sodium silicate. The spent, agglomerated moulding sand has undergone a crushing process. Next, the required granular fractions used for individual layers of the stucco material were separated. Ceramic samples, in which the spent moulding sand was a substitute for fresh silica sand in successive layers of the stucco composition, were prepared. As a reference material, identical ceramic samples were used but with all layers made from the fresh silica sand. Samples prepared in this way were used to determine the bending strength of ceramic materials in the temperature range from 20 to 900ºC. The obtained values of the bending strength have demonstrated that spent moulding sand can be used in investment casting with no adverse effect on the strength of ceramic materials.","PeriodicalId":8301,"journal":{"name":"Archives of Foundry Engineering","volume":"674 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135636565","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
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