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All Journal Jurnal Teknologi Bahan dan Barang Teknik Metalurgi
Bintang Adjiantoro
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Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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PENGARUH UNSUR Ni, Cr DAN Mn TERHADAP SIFAT MEKANIK BAJA KEKUATAN TINGGI BERBASIS LATERIT Rahardjo Binudi; Bintang Adjiantoro
Metalurgi Vol 29, No 1 (2014): Metalurgi Vol.29 No.1 April 2014
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (291.973 KB) | DOI: 10.14203/metalurgi.v29i1.269

Abstract

PROSES DEKARBURISASI NICKEL PIG IRON Adil Jamali; Ra Binudi; Bintang Adjiantoro
Metalurgi Vol 29, No 2 (2014): Metalurgi Vol.29 No.2 Agustus 2014
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.881 KB) | DOI: 10.14203/metalurgi.v29i2.287

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PENGARUH UNSUR KE-EMPAT TERHADAP TRANSFORMASI FASA DAN EFEK INGAT BENTUK (SHAPE MEMORY EFECT) PADUAN Ti- Ni-Cu[The Influence of Fourth Element on Phase Transformation and Shape Memory Effect (SME) of Ti-Ni-Cu Alloys] Efendi Mabruri; Bambang Sriyono; Bintang Adjiantoro; D N Adnyana
Metalurgi Vol 28, No 1 (2013): Metalurgi Vol.28 No.1 April 2013
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.339 KB) | DOI: 10.14203/metalurgi.v28i1.245

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PEMBUATAN MATERIAL KOMPOSIT MATRIKS PADUAN Al–6,2%Mg/Al2O3(p) DENGAN PROSES STIRR-CASTING Bintang Adjiantoro; Bambang Sriyono
Metalurgi Vol 29, No 1 (2014): Metalurgi Vol.29 No.1 April 2014
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (628.863 KB) | DOI: 10.14203/metalurgi.v29i1.272

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Karakteristik Sifat Mekanik Baja Laterit Melalui Proses Pengerjaan dan Perlakuan Panas Bintang Adjiantoro; Adil Jamali; Rahardjo Binudi; Muhammad Yunan Hasbi
Jurnal Teknologi Bahan dan Barang Teknik Vol 6, No 2 (2016)
Publisher : Balai Besar Bahan dan Barang Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (773.49 KB) | DOI: 10.37209/jtbbt.v6i2.72

Abstract

Steel laterite potentially meet the national infrastructure demand that requires toughness properties because of Ni content is about 2-3%. In this study, there were five types composition of the as-cast steel laterite from decarburises Nickel Pig Iron (NPI) process. Five types of compositions as-cast steel were prepared for homogenizing process at 900 °C and subsequently hot rolled into the size 6,5 mm thick from 40 mm. Hot rolled process conducted at 980 °C with three stages of reduction. The first stage was 60%, 40% the second and last stage was 30%. Samples subsequently cooled in the air and prepared for hardness test and tensile test. Results of hot rolled process showed that the formability of steel laterite quite well with no crack during hot rolled. Increased mechanical properties of steel promoted by hot rolled process with optimum results 238,5 HB and 779 N/mm2 respectively. Metallography observation obtained show that Ni was promoted grain refining on recrystallization phenomena.Baja berbasis bijih nikel laterit berpotensi diaplikasikan dalam infrastruktur yang membutuhkan sifat tangguh karena kandungan Ni yang dimiliki yaitu sebesar 2-3%. Dalam studi ini telah dilakukan penelitian mengenai sifat mekanik terhadap lima jenis komposisi as-cast baja laterit hasil proses dekarburisasi Nickel Pig Iron (NPI).  Baja laterit hasil as-cast dengan  lima jenis komposisi terlebih dahulu dilakukan homogenisasi dengan proses anil pada suhu 900 °C. Spesimen baja kemudian dilakukan pengerolan panas hingga menjadi pelat dengan ketebalan 6 mm dari tebal awal 40 mm. Proses pengerolan dilakukan pada suhu 980 °C dengan tiga tahap reduksi yaitu 60%, 40% dan 30%. Setelah proses pengerolan panas dilakukan, pelat didinginkan di udara dan kemudian dilakukan uji kekerasan dan uji tarik. Hasil penelitian menunjukkan bahwa mampu bentuk baja laterit cukup baik dengan tidak ditunjukkannya keretakan pada sampel. Hasil uji kekerasan dan uji tarik juga menunjukkan kecenderungan peningkatan pada tiap sampel baja dengan nilai optimal mencapai 238,5 HB dan 779 N/mm2. Ditinjau dari pengamatan struktur mikro, paduan Ni memicu penghalusan butir dalam fenomena rekristalisasi.
Co-Authors Adil Jamali Bambang Sriyono D N Adnyana Efendi Mabruri Muhammad Yunan Hasbi Ra Binudi Rahardjo Binudi