Analisis Perbandingan Proses Pengecoran Terhadap Kekerasan Dan Porositas Material ADC12 Pada Produk Kotak Musik

Mukhamad, Mukhlason (2026) Analisis Perbandingan Proses Pengecoran Terhadap Kekerasan Dan Porositas Material ADC12 Pada Produk Kotak Musik. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Perkembangan teknologi manufaktur logam presisi menuntut proses produksi yang efisien dan hasil produk dengan ketelitian tinggi. Salah satu material yang banyak digunakan adalah ADC12, karena memiliki sifat mampu cor dan kekuatan mekanik yang baik. Penelitian ini membahas pengaruh variasi proses pengecoran terhadap kekerasan dan porositas material ADC12 pada produk kotak musik, melalui perbandingan metode sand casting (SC), investment casting block (ICB), dan investment casting dipping (ICD), dengan filamen Polycast berbasis 3D printing sebagai pola cetakan. Pengujian dilakukan melalui uji kekerasan Brinell (ASTM E10) pada tiga titik ketebalan dinding berbeda, serta analisis metalografi dan pengukuran porositas menggunakan perangkat lunak ImageJ mengacu pada ASTM E1245. Hasil penelitian menunjukkan bahwa metode SC menghasilkan nilai kekerasan rata-rata tertinggi (36,67 HBW), diikuti ICB (36,34 HBW), dan ICD terendah (33,32 HBW). Uji One-Way ANOVA membuktikan bahwa metode pengecoran berpengaruh signifikan terhadap nilai kekerasan (F = 4,51; P = 0,022), dengan uji lanjut Tukey menunjukkan perbedaan signifikan hanya antara SC dan ICD. Dari sisi porositas, SC menghasilkan tingkat porositas terendah (0,513%), diikuti ICB (1,571%), dan ICD tertinggi (3,571%), namun seluruh nilai masih berada di bawah ambang batas 4% yang ditetapkan. Secara keseluruhan, metode SC dan ICB menghasilkan kualitas mekanik yang relatif setara dan lebih unggul dibandingkan ICD, sehingga dapat menjadi dasar pengembangan teknologi manufaktur logam presisi berbasis pola 3D printing untuk mendukung inovasi produksi komponen kecil pada sektor industri kreatif. =================================================================================================================================
The development of precision metal manufacturing technology demands efficient production processes with high dimensional accuracy. ADC12 is widely used due to its excellent castability and mechanical strength. This study examines the effect of casting process variations on the hardness and porosity of ADC12 used in a music box frame, comparing sand casting (SC), investment casting block (ICB), and investment casting dipping (ICD), using 3Dprinted Polycast filament patterns. Testing was conducted using Brinell hardness testing (ASTM E10) at three wall-thickness points, along with metallographic analysis and Image based porosity measurement referring to ASTM E1245. Results show that SC produced the highest average hardness (36.67 HBW), followed by ICB (36.34 HBW), with ICD lowest (33.32 HBW). One-Way ANOVA confirmed that casting method significantly affects hardness (F = 4.51; P = 0.022), and Tukey's post-hoc test showed a significant difference only between SC and ICD. Regarding porosity, SC produced the lowest porosity (0.513%), followed by ICB (1.571%), and ICD the highest (3.571%), all remaining below the 4% threshold set for this study. Overall, SC and ICB produced comparable and superior mechanical quality relative to ICD, providing a basis for developing 3D-printing-pattern-based precision metal manufacturing to support small-component production innovation in the creative industry sector.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Pengecoran, ADC12, Kotak Musik, Polycast, Kekerasan, Porositas, Sand Casting, Investment Casting ============================================================ Casting, ADC12, Music Box, Polycast, Hardness, Porosity, Sand Casting, Investment Casting
Subjects:	T Technology > TS Manufactures > TS176 Manufacturing engineering. Process engineering (Including manufacturing planning, production planning) T Technology > TS Manufactures > TS183 Manufacturing processes. Lean manufacturing. T Technology > TS Manufactures > TS233 Sand casting. Metal castings--Thermal properties.
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Mukhamad Mukhlason
Date Deposited:	24 Jul 2026 03:24
Last Modified:	24 Jul 2026 03:24
URI:	http://repository.its.ac.id/id/eprint/136590

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