The Role of Acid Hardener on the Hardening Characteristics, Collapsibility Performance, and Benchlife of the Warm-Box Sand Cores

• Autorzy: Budavári Imre , Hudák H. , Fegyverneki G.

Identyfikatory

DOI

10.24425/afe.2023.144282

• Języki publikacji: EN

Abstrakty

EN

The heat-cured core-making process has been applied for over 60 years to produce molds and cores for different types of castings. The following technologies can be classified into the terminology of “heat-cured coremaking process”: croning-, hot-box -, and warm-box process. The latest technology provides good workability of core mixture, good strength properties, dimensional stability, and good knockout performance of the sand cores. Despite all its advantages, the warm-box technology is less widespread in foundries due to the cost of the high quality thermosetting resin and the maintenance cost of the core box. In this study, the influence of the acid hardener content on the hardening characteristics (bending strength), collapsibility, and the benchlife of the warm-box sand cores were investigated. From the results, it can be said, that within the investigated composition range, increasing the acid hardener content will improve the bending strength of the sand cores. The increased acid hardener content results in higher thermal stability at the beginning of the thermal exposure, and smaller residual bending strength after 15 minutes of thermal loading. The acid hardener level has little effect on the benchlife of the warm-box sand cores, although the sand core mixture is very sensitive to the combined effect of the sand temperature and dwelling time.

Słowa kluczowe

EN

sand cores; Warm-box; acid hardener; bending strength; durability; collapsibility

PL

rdzenie piaskowe; Warm-box; utwardzacz kwasowy; wytrzymałość na zginanie; trwałość

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2023
• Tom: Vol. 23, iss. 1
• Strony: 68--74
• Opis fizyczny: Bibliogr. 28 poz., il., tab., wykr.

Twórcy

autor

Budavári Imre

• University of Miskolc, Faculty of Materials Science of Engineering, Institute of Foundry, Hungry

• https://orcid.org/0000-0002-4549-7415

autor

Hudák H.

• University of Miskolc, Faculty of Materials Science of Engineering, Institute of Foundry, Hungry

autor

Fegyverneki G.

• University of Miskolc, Faculty of Materials Science of Engineering, Institute of Foundry, Hungry

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)