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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Wahana Ilmuwan Journal of Mechanical Engineering
A.Noor Setyo HD, A.Noor
Dosen Teknik Mesin Universitas Tidar
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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PENGARUH VISKOSITAS OLI TERHADAP KEKERASAN DAN STRUKTUR MIKRO BAJA 60 Noor Setyo
Wahana Ilmuwan Vol 2, No 2 (2016): Wahana Ilmuwan
Publisher : Wahana Ilmuwan

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Abstract

This study aims to determine the effect of cooling medium in the quenching process on the level of the surface hardness of steel alloy ST 60 has a composition of 0.45% C, 0.33% Si; 0.43% Mn. While as the cooling medium varisi sequentially used oil SAE 20; SAE 40; and SAE 60. Quenching heating process is done by heating the steel in the furnace heated to a temperature of austenite 7500C, being the quenching process is performed by using the oil cooler media SAE10; SAE 40; and SAE 80. The surface hardness before and after quenching is known to test the micro Vickers on a load of 150 grams, while the microstructure observation was performed using an optical microscope magnification of 200 x.Results showed a linear relationship between the level of violence to the level of dilution oil cooler. Material surface hardness increased with the increasing rate of the cooling medium viscosity. Sequentially large surface hardness of the thinned oil SAE 10; SAE 40; and SAE 80 is obtained 175VHN0,015; 179 VHN0,15; dan 195VHN0,015. The microstructure of the experience was change of pearlite into cementite with a higher level of dilution cooling medium.
SIFAT FISIS DAN MEKANIS LAPISAN NIKEL-CHROMIUM PADA PERMUKAAN BAJA AISI 410 A.Noor Setyo HD; Suheli Suheli
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2015): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 6 2015
Publisher : Prosiding SNST Fakultas Teknik

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Abstract

Penelitian ini bertujuan untuk mengetahui seberapa besar pengaruh kuat arus pada  proses elektroplating Nickel-Chromium (Ni-Cr) pada baja AISI 410 terhadap perubahan struktur mikro logam dasar dan kekerasan lapisan hasil. Proses pelapisan delakukan dengan memvariasi kuat arus  1,25; 1,5 dan 1,75 Amper dengan tegangan 6 Volt dan lama proses pelapisan 30 (tiga puluh) menit konstan. Pelapisan Ni-Cr dilakukan dalam dua tahap. Pertama, pelapisan Ni (Nickel) yang dilakukan dengan menggunakan anoda berupa batang Ni (Nickel), jenis larutan elektrolit watt’s bath yang terdiri dari campuran 150 g/l NiSO4, 30 g/l NH4Cl, 30 g/l H3BO3 pada temperatur kerja 25 – 35 oC, pH 4 -6 dengan agitasi udara. Tahap dua Proses Chromium plating, jenis anoda Pb (lead) dan Sn (antimony), sedang larutan berupa campuran elektrolit 300 gr/l CrO3, 3gr/l H2SO4 pada temperatur kerja 40–55 oC, pH sekitar 0,4 – 0,5 dan agitasi udara. Struktur mikro dapat diketahui dengan mikroskop optic digital, sedang kekerasan permukaan lapisan dengan uji mikro Vickers pada beban 25 gr. Hasil penelitian menunjukkan kekerasan permukaan pada arah lateral meningkat bila kuat arus meningkat. Pada kuat arus 1,25 Amper, sebesar 302 VHN0,025, kuat arus 1,50 Amper 398,64 VHN0,025, dan kuat arus 1,75 Amper sebesar 533,90 VHN0,025. Sedangkan struktur mikro logam dasar akibat proses plating tidak mengalami perubahan yaitu ferrit. Kata kunci : agitasi udara, ferrit, struktur mikro,
PENINGKATAN SIFAT MEKANIS BESI COR KELABU MELALUI PROSES TEMPERING A. Noor Setyo HD; Sri Widodo
Journal of Mechanical Engineering Vol 2, No 2 (2018): Journal of Mechanical Engineering
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/jom.v2i2.1365

Abstract

This study aims to determine the Hardness and Toughness of cast iron after undergoing a Tempering process with independent variables heating time and dependent Hardness, microstructure and toughness Impack. Quenching was carried out at temperatures of 7750C, 8000C and 8250C in cold water media, while Tempering was carried out at temperatures of 2000C, 3000C and 4000C with a holding time of 15 minutes. Vickers Hardness test results using "Micro Hardness Tester" after Quenching have increased by an average of 95.6% at Quenching 7750C, 99.8% at Quenching 8000C and 107.1% at Quenching temperature 8250C from Hardness value of row material of 256.6 BHN or 260.8 VHN0,040. The maximum hardness value is obtained 531.4 BHN or 553.6 VHN 0,040 at Quenching temperature 8250C and the lowest Hardness of 501.8 BHN or 541,8 VHN0,040 at Quenching 7750C temperature, has Cementite phase as a matrix with little Martensite, is due to treatment The partial tempering of Martensite is replaced by the ferrite phase between Cementites. The results of the study concluded that at Tempering temperatures of 2000C, 3000C and 4000C, the toughness of FC 30 experienced an increase of 106.5%, 121.9% and 130.5% from the initial energy of 5.21 Joule / mm2, whereas violence decreased by 88, 6%, 80.8% and 40.4% of the original Hardness of 260.8 VHN 0,040
Co-Authors Sri Widodo Suheli Suheli