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Application of 3D Printed Casting Models for Disamatch Forming Method

Ł. Bernat A. Kroma

Archives of Foundry Engineering | 2019 | vol. 19 | No 4 | 95-98 | DOI: 10.24425/afe.2019.129637

Keywords Rapid prototyping FDM DPP SLA Casting models

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Abstract

This paper presents results of a research on the possibilities of applying 3D printed casting models for small production series as alternative to traditional tooling production on automated DisaMatch mould production lines. The main task was to verify and compare the dimensions of the 3D printed models before and after moulding process. The paper discusses main advantages and disadvantages of the 3D printing methods used like FDM (Fused Deposition Modeling)/FFF (Fused Filament Fabrication), SLA (stereolitography) and DPP (Daylight Polymer Printing). Measurement of casting model outside dimension change resulting from moulding sand friction on their surface was made with the use of GOM INSPECT software on the basis of 3D scans made with ATOS TripleScan optical scanner. Hardness of 3D printed models made of ABS, Z-ULTRAT, three different photopolymer resins (from FormLab and Liquid Crystal companies) was verified. The result of the research printed models usability for the foundry industry was presented.

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Authors and Affiliations

Ł. Bernat

A. Kroma

Effect of Filter Type on Mechanical Properties During Aluminium Alloy Casting

M. Bruna M. Galčík

Archives of Foundry Engineering | 2022 | vol. 22 | No 3 | 95-98 | DOI: 10.24425/afe.2022.140241

Keywords Aluminium alloys Filtration Mechanical properties Reoxidation Melt velocity

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Abstract

The naturally pressurized gating system was used for reoxidation suppression during aluminium alloy casting. A naturally pressurized gating system appears to be a suitable solution to reduce reoxidation processes, which was proven by our previous works. The disadvantage of this system is that without inserting deceleration elements, the melt velocity is supercritical. Therefore, the aim of paper is to find a proper way to reduce the melt velocity, which is the main parameter affecting the scale of reoxidation processes. For the purpose of the melt velocity reduction, labyrinth filters, foam filters and flat filters effect on the melt velocity and the number of oxides were investigated by numerical simulation software in the first stage of the experiment. After simulations observation, the effect of filters on the mechanical properties was investigated by experimental casts. The simulations and experimental casts proved that filters had a positive effect on the melt velocity reduction and it was associated with increased mechanical properties of castings. The best results were achieved by the foam filter.

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Bibliography

[1] Campbell, J. (2015). Complete Casting Handbook. (2nd ed.). Oxford: Elsevier Ltd.
[2] Dobosz, St.M., Grabarczyk, A., Major-Gabrys, K. & Jakubski, J. (2015). Influence of quartz sand quality on bending strength and thermal deformation of moulding sands with synthetic binders. Archives of Foundry Engineering. 15(2), 9-12. ISSN (1897-3310)
[3] Lakoma, R., Camek, L., Lichý, P., Kroupová, I., Radkovský, F. & Obzina, T. (2021). Some possibilities of using statistical methods while solving poor quality production. Archives of Foundry Engineering. 21(1), 18-22. DOI: 10.24425/afe.2021.136073
[4] Baghani, A., Kheirabi, A., Bahmani, A. & Khalilpour, H. (2012). Removal of double oxide film defects by ceramic foam filters. Journal of Materials Engineering and Performance. 21(7), 1352-1362. DOI: 10.1007/s11665-011-9991-3
[5] Jezierski, J., Dojka, R. & Janerka, K. (2018). Optimizing the Gating System for Steel Castings. Metals. 8(266), 1-13. DOI: 10.3390/met804026
[6] Pastirčák, R. & Ščury, J. (2016). Effect of technological parameters on microstructure in alloy AlCu4Ti using squeeze casting technology. The application of experimental and numerical methods in fluid mechanics and energy. ISBN 978-0-7354-1402-0.
[7] Gyarmati, G., Fegyverneki, G., Mende, T. & Tokár, M. 2019. Characterization of the double oxide film content of liquid aluminum alloys by computed tomography. Materials Characterization. 157, 109925.
[8] Remišová, A. & Brůna, M. (2019). Analysis of reoxidation processes with aid of computer simulation. Archives of Foundry Engineering. 19(4), 55-60.
[9] Brůna, M., Galčík, M., Sládek, A. & Martinec, D. (2021). Possibilities of bifilm amount reduction in Al castings by gating system design optimization. Archives of Metallurgy and Materials. 66(2), 549-559. ISSN 1733-3490

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Authors and Affiliations

M. Bruna

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M. Galčík

University of Žilina, Slovakia

Raja rakusai sp. n. (Pisces, Rajidae) from the area of Elephant Island (South Shetland Islands)

Jan Maciej Rembiszewski

Polish Polar Research | 1980 | vol. 1 | No 1 | 95-98

Keywords Antarctic skate new species

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Abstract

The new species of antarctic skates was described from waters near Elephant Island, as a Raja rakusai sp. n.

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Jan Maciej Rembiszewski

Effect of Cooling Rate on Microstructure and Mechanical Properties According to Heat Treatment Temperature of Inconel 625

Minha Park Gang Ho Lee Hyo-Seong Kim Byoungkoo Kim Sanghoon Noh Byung Jun Kim

Archives of Metallurgy and Materials | 2024 | vol. 69 | No 1 | 95-98 | DOI: 10.24425/amm.2024.147793

Keywords Inconel 625 heat treatment cooling rate microstructure mechanical property

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Abstract

Inconel 625 is typically used in extreme environments due to excellent mechanical properties such as high strength, corrosion resistance, abrasion resistance and low-temperature toughness. When manufacturing a hot forged flange with a thick and complex shape, the cooling rate varies depending on the location due to the difference in thermal gradient during the cooling process after hot forging. In this study, to evaluate the microstructure and mechanical properties of Inconel 625 according to the cooling rate, we performed heat treatment at 950°C, 1050°C, and 1150°C for 4 hours followed by water cooling. Additionally, temperature data for each location on the flange were obtained using finite element method (FEM) simulation for each heat treatment temperature, revealing a discrepancy in the cooling rate between the surface and the center. Therefore, the correlation between microstructure and mechanical properties according to cooling rate was investigated.

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Authors and Affiliations

Minha Park

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Gang Ho Lee

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Hyo-Seong Kim

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ORCID:

Byoungkoo Kim

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ORCID:

Sanghoon Noh

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ORCID:

Byung Jun Kim

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ORCID:

Energy System Group, Korea Institute of Industrial Technology, Busan 46938, Republic of Korea
Energy System Group, Korea Institute of Industrial Technology, Busan 46938, Republic of Korea; Pukyong National University, Department of Materials Science and Engineering, Busan 48513, Republic of Korea
Pukyong National University, Department of Materials Science and Engineering, Busan 48513, Republic of Korea

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Application of 3D Printed Casting Models for Disamatch Forming Method

Abstract

Authors and Affiliations

Effect of Filter Type on Mechanical Properties During Aluminium Alloy Casting

Abstract

Bibliography

Authors and Affiliations

Raja rakusai sp. n. (Pisces, Rajidae) from the area of Elephant Island (South Shetland Islands)

Abstract

Authors and Affiliations

Effect of Cooling Rate on Microstructure and Mechanical Properties According to Heat Treatment Temperature of Inconel 625

Abstract

Authors and Affiliations