PENGARUH PROSES PENGEROLAN DINGIN DAN PROSES PERLAKUAN PANAS ANIL TERHADAP STRUKTUR MIKRO, KEKERASAN, DAN KETAHANAN KOROSI PADUAN Cu-34Zn-Ni

REZA PUTRA ANANDA, . (2025) PENGARUH PROSES PENGEROLAN DINGIN DAN PROSES PERLAKUAN PANAS ANIL TERHADAP STRUKTUR MIKRO, KEKERASAN, DAN KETAHANAN KOROSI PADUAN Cu-34Zn-Ni. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Penelitian ini membahas pengaruh proses pengerolan dingin dan perlakuan panas (anil) terhadap struktur mikro, kekerasan, serta ketahanan korosi pada paduan kuningan Cu-34Zn dengan variasi penambahan unsur nikel (0,5%, 1%, dan 1,5%). Penelitian dilatarbelakangi oleh kebutuhan material alternatif untuk peralatan medis yang memiliki kombinasi sifat mekanik dan ketahanan korosi yang baik, menggantikan material stainless yang memerlukan treatment setelah penggunaan serta impor berbiaya tinggi. Kajian teori meliputi mekanisme penguatan logam, pengaruh unsur Ni terhadap paduan Cu-Zn, serta teori rekristalisasi dan difusi atom pada pengerolan dingin dan perlakuan panas anil. Metode penelitian mencakup pengecoran gravitasi, homogenisasi pada 800 °C selama 2 jam, pengerolan dingin dengan reduksi ketebalan 70%, dan proses anil pada temperatur 300-600 °C. Karakterisasi dilakukan melalui uji komposisi kimia (OES), pengamatan struktur mikro menggunakan mikroskop optik, uji kekerasan vickers, dan uji ketahanan korosi metode weight loss. Hasil menunjukkan bahwa penambahan Ni meningkatkan homogenitas struktur mikro dan memperhalus butir. Paduan Cu-34Zn-1Ni mencapai kekerasan tertinggi 225,74 VHN, sedangkan ketahanan korosi terbaik ditunjukan pada Cu-34Zn-1Ni setelah anil 600 °C. Secara keseluruhan, kombinasi pengerolan dingin dan anil meningkatkan sifat mekanik dan ketahanan korosi, menjadikan paduan ini potensial untuk aplikasi alat medis dan lingkungan korosif. Kata Kunci: pengerolan dingin, anil, struktur mikro, ketahanan korosi. ***** This study investigates the effect of cold rolling and heat treatment (annealing) processes on the microstructure, hardness, and corrosion resistance of Cu-34Zn brass alloy with variations in nickel addition (0.5%, 1%, and 1.5%). The research is motivated by the need for alternative materials for medical instruments that combine good mechanical properties and corrosion resistance, as a substitute for stainless steel, which requires post-use treatment and is relatively expensive due to import dependence. The theoretical framework includes the mechanisms of metal strengthening, the influence of Ni addition on Cu-Zn alloys, and theories of recrystallization and atomic diffusion during cold rolling and annealing heat treatment. The experimental methods consist of gravity casting, homogenization at 800 °C for 2 hours, cold rolling with a 70% thickness reduction, and annealing at temperatures ranging from 300 °C to 600 °C. Characterization was performed through chemical composition analysis (OES), microstructural observation using an optical microscope, Vickers hardness testing, and corrosion resistance testing using the weight loss method. The results show that nickel addition improves microstructural homogeneity and refines the grain structure. The Cu-34Zn-1Ni alloy exhibited the highest hardness of 225.74 VHN, while the best corrosion resistance was achieved in Cu-34Zn-1Ni after annealing at 600 °C. Overall, the combination of cold rolling and annealing enhanced both mechanical properties and corrosion resistance, making this alloy a promising candidate for medical instrument applications and corrosive environments. Keywords: cold rolling, annealing, microstructure, corrosion resistance.

Item Type:	Thesis (Sarjana)
Additional Information:	1). Dr. Imam Basori, M.T. ; 2). Dr. Ahmad Kholil, M.T.
Subjects:	Teknologi dan Ilmu Terapan > Teknik Mesin, Mekanika Teknik
Divisions:	FT > S1 Teknik Mesin
Depositing User:	Reza Putra Ananda .
Date Deposited:	23 Dec 2025 09:01
Last Modified:	23 Dec 2025 09:01
URI:	http://repository.unj.ac.id/id/eprint/62895

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