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All Journal FLYWHEEL : Jurnal Teknik Mesin Untirta Mesin
Kurnia Nugraha
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Pengaruh Perlakuan Panas Terhadap Peningkatan Sifat Mekanik Paduan Besi Tuang Putih Dengan Cr-Ni Untuk Bilah Shot Blasting Hasanudin Gufron Fachrudin; Hamdan Akbar Notonegoro; Greida Frista; Yusvardi Yusuf; Erny Listijorini; Rina Lusiani; Kurnia Nugraha; Aswata Aswata
FLYWHEEL : Jurnal Teknik Mesin Untirta Volume III Nomor 2, Oktober 2017
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (980.011 KB) | DOI: 10.36055/fwl.v2i1.2651

Abstract

Bilah sebagai salah satu komponen yang berfungsi sebagai pelontar bola-bola logam dalam mesin shot blasting, sebagian besar diimpor dari luar negeri. Namun demikian, masih ditemukan kegagalan ataupun umur pakai yang pendek. Hal ini disebabkan bilah-bilah tersebut rentan terhadap gesekan dan benturan akibat kondisi operasional. Untuk itu, dalam penelitian ini dikembangkan bahan bilah berbasis paduan besi tuang putih dengan Cr-Ni. Peningkatan sifat mekaniknya dilakukan melalui variasi perlakuan panas, baik hardening (900–1000 oC) maupun tempering (400 oC, 500 oC, dan 1000 oC). Dari penelitian ini didapati bahwa nilai optimal kenaikan sifat mekanik, baik kekerasan dan ketahanan gesek, dihasilkan melalui hardening pada suhu 1000 oC yang dilanjutkan tempering pada suhu 400 oC. Pada kondisi tersebut, struktur fasa yang terbentuk berupa ferit acicular, perlite dan karbida berbentuk bulat-bulat kecil. Struktur fasa ini membuat sifat mekanik sampel menjadi lebih keras dan lebih tahan terhadap gerusan saat terjadi gesekan.
KAJI NUMERIK PENGARUH CACAT RETAK MELINTANG PADA POROS TERHADAP PERILAKU DINAMIK SISTEM POROS ROTOR Bagus Budiwantoro; Ojo Kurdi; Kurnia Nugraha
Mesin Vol. 16 No. 3 (2001)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The stiffness of a cracked shaft changes due to the position of the crack. The problem is how to make a general equation of motion that can be used for all crack positions, so frequency response resulted represents the real frequency response of the cracked shaft. The cracked shaft modelling uses the moment inertia of cracked shaft at various crack positions is the first step. The second step is determining frequency response of significant crack position. The third step is determining the equivalent moment inertia of a cracked shaft that represents the condition of the crack. Next, by using Rayleight-Ritz Method and equivalent moment inertia of cracked shaft, the equation of motion that represents condition of cracked shaft can be determined. The results of this equation are Campbell Diagram and response to force excitation due to mass unbalance and asynchronous force. Dynamic behaviors of system are presented for three positions of crack, namely 0o, 90o, and average position. 0o position is the significant position, 90o position gives the smallest change to dynamic behavior of cracked shaft and the average position represents the condition of the cracked shaft.
Co-Authors Aswata Aswata Bagus Budiwantoro Erny Listijorini Greida Frista Hamdan Akbar Notonegoro Hasanudin Gufron Fachrudin Ojo Kurdi Rina Lusiani Yusvardi Yusuf