Experimental Study of the Effect of Salt Content in Cooling Media on the Mechanical Properties of Alloy Materials Resulting from Copper Casting with Used Cylinder Blocks

Rudy Sutanto, Sinarep Sinarep

Abstract


Casting of cylinder block metal with copper is a process of making objects by melting/melting metal with copper at a certain temperature. This study aims to evaluate the effect of variations in the concentration of water and salt solution-based quenching medium on the mechanical properties of metals including hardness and impact toughness after heat treatment. Three variations of quenching medium used were 90% water: 10% salt, 80% water: 20% salt, and 70% water: 30% salt. The test results showed that increasing the salt concentration in the quenching medium caused a significant increase in material hardness, with the highest value of 27.3 kg/mm² obtained in quenching medium using 70% water: 30% salt. This increase in hardness was associated with the acceleration of martensite phase formation due to the higher quenching rate. However, the increase in hardness was accompanied by a decrease in impact toughness. The highest toughness value of 6300 J/m² was recorded in a quenching medium of 90% water: 10% salt, while a drastic decrease occurred at a salt concentration of 30%, which only reached 5733 J/m². This decrease is caused by the dominance of the martensitic structure which is hard but brittle, thus reducing the material's ability to absorb shock energy.


Keywords


heat treatment, quenching medium, hardness, impact toughness, salt solution.

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References


. Santoso, E. dan Setiawan, N. H., 2020. Analisa pengaruh variasi holding time dan variasi kadar garam media pendingin pada perlakuan panas baja AISI 1045 terhadap struktur mikro dan sifat mekanik. Mekanika: Jurnal Teknik Mesin, 6(1), 18-22.

. Achmadi, A., 2017. Studi eksperimen pengaruh perlakuan quenching dengan variasi pendingin konsentrasi air garam terhadap kekerasan dan kekuatan tarik pada baja ST 37. Simetris: Jurnal Teknologi dan Sain Terapan, 11(2), 34-42.

. Aziza, Y. dan Yayi Febdia Pradani., 2017. Pengaruh kadar garam dapur (NaCl) dalam media pendingin terhadap tingkat kekerasan pada proses pengerasan baja ST 60. G Tech: Jurnal Teknologi Terapan. 1(1), 18-25.

. Syaifullah, M. dkk., 2021. Pengaruh air garam sebagai media pendingin terhadap nilai kekerasan pada proses pengerasan baja ST 60. Jurnal Syntax Admiration, 2(8), 1555-1569.

. Wibowo, A. T. dan Samlawi, A.K., 2020. Pengaruh Proses Quenching Dengan Media Pendingin Air dan Oli Terhadap Kekerasan Baja dan Struktur Mikro Baja S45C. JTAM ROTARY, 2(2), 137-148.

. Aziz, A. dan Mutaqin, M., 2023. Pengaruh Variasi Media Pendingin Terhadap Sifat Mekanik Dan Struktur Mikro Pada Baja S45C. Perwira Journal of Science & Engineering, 3(2), 48-53.

. Rifqi, M. 2023. Pengaruh variasi penambahan SiC pada proses pengecoran Blok Silinder Yamaha bekas terhadap ketahanan Aus dan pengamatan SEM (Doctoral dissertation, Universitas Mataram).

. Lubis, S. dan Siregar, I., 2020. Proses Pengecoran Aluminium Sebagai Bahan Pembuatan Blok Silinder. Jurnal Mesil (Mesin Elektro Sipil), 1(1), 30-37.

. Nugroho, E. dkk., 2019. Pengaruh Temperatur dan Media Pendingin pada Proses Heat Treatment Baja AISI 1045 Terhadap Kekerasan dan Laju Korosi. Jurnal Program Studi Teknik Mesin UM Metro: TURBO 8(1), 99-110

. Grigorian, C. M. and Rupert, T. J., 2020. Critical cooling rates for complexion transitions in Cu rich nanocrystalline alloys. arXiv.

. Jo, H. et al., 2020. Effects of cooling rate during quenching and tempering conditions on microstructures and mechanical properties of carbon steel flange. Materials, 13(18), 4186.

. Adekunle, A. S. et al., 2020. Effect of copper addition and solution heat treatment on mechanical properties of aluminum alloy using formulated bio quenchant oils. Engineering and Applied Science Research, 47(3), 297–305.

. ISO 148 1., 2021. Metallic materials — Charpy pendulum impact test — Part 1: Test method. International Organization for Standardization.

. ASTM International. ASTM E92-17., 2017: Standard Test Methods for Vickers Hardness and Knoop Hardness of Metallic Materials. ASTM International.

. ASTM International. ASTM E23-23., 2023: Standard Test Methods for Notched Bar Impact Testing of Metallic Materials. West Conshohocken, PA: ASTM International..

. Xia, C. et al., 2022. Orientation relationships between precipitates and matrix and their crystallographic transformation in a Cu–Cr–Zr alloy. Materials Science and Engineering A, 850, 143576.

. Rahman, M. A. et al., 2021. Effect of quenching medium on the mechanical properties and microstructure of medium carbon steel. Materials Today: Proceedings, 44, 2796–2800.

. Zhang, X. et al., 2022. Effect of quenching cooling rate on microstructure evolution and hardness of steel alloys. Journal of Materials Research and Technology, 18, 120–129.

. Ahmed, A. A. and Al-Jubouri, S. A., 2023. Influence of salt concentration in quenching media on the heat transfer coefficient and surface hardness of alloy steels. Engineering Science and Technology, an International Journal, 38, 101174.

. Sukanta, P. et al., 2020. Effect of different quenching media on mechanical properties and microstructure of medium carbon steel. Materials Today: Proceedings, 28, 2011–2016.

. Prabhu, K. N. and Fernandes, P., 2021. Effect of quenching media on the mechanical properties of steel: A review. Journal of Materials Research and Technology, 14, 2631–2648.

. Jafari, M. et al., 2020. Microstructure and mechanical properties of steels quenched in different salt solution concentrations. Materials Chemistry and Physics, 250, 122981.

. Kumar, S. et al., 2023. Influence of quenching rate on mechanical behavior of medium carbon steel. Materials Today: Proceedings, 82, 1864–1870.




DOI: http://dx.doi.org/10.52155/ijpsat.v53.2.7554

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