Ramadhan, Cakra Januar (2019) Analisa Pengaruh Variasi Waktu Penahanan Pada Proses Pengerasan Induksi Baja ST - 41 Terhadap Struktur Mikro, Nilai Kekerasan Dan Kekuatan Impak. Diploma thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Mobil Nogogeni ITS Team adalah mobil prototype yang berbahan bakar listrik dan ethanol, memiliki seluruh komponen yang menunjang performa dari mobil tersebut. Salah satu bagian penting yang menerima seluruh beban mobil tersebut adalah poros roda. Poros roda mobil Nogogeni diharuskan mampu untuk menahan seluruh beban mobil tanpa mengalami deformasi plastis dan harus memiliki kekerasan yang baik agar tahan aus dan awet serta memiliki ketangguhan untuk menahan beban impak.
Untuk mendapatkan suatu sifat poros, maka dilakukan laku panas pengerasan induksi dengan suhu pemanasan 900○C, dengan variasi waktu penahanan 15 menit, 30 menit, dan 45 menit menggunakan media pendingin air.
Setelah dilakukan laku panas pengerasan induksi dan dilakukan pengujian, didapatkan hasil yang beragam. Pada variasi waktu penahanan 15 menit diperoleh hasil metalografi dengan persentase martensite 71%, kekerasan kulit 47,5 HRC dan kekuatan impak rata-rata 637,7 Kg/cm. Pada variasi waktu penahanan 30 menit diperoleh hasil metalografi dengan presentase 43,1%, kekerasan kulit 47,5 HRC dan kekuatan impak 567,8 Kg/cm kemudian pada variasi waktu penahanan 45 menit diperoleh hasil metalografi dengan presentase martensit 36,9%, kekerasan kulit 48 HRC dan kekuatan impak 505,4 Kg/cm.
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Nogogeni is a prototype car that uses electricity and
ethanol, has all the components that support the performance of the car. One important part that accepts the entire load of the car is the wheel shaft. The Nogogeni car wheel shaft is required to be able to hold all car loads without plastic deformation and must have good hardness to be resistant and durable and have the toughness to withstand impact loads.
To obtain a shaft characteristic, induction hardening heat is carried out with a heating temperature of 900 ○ C, with a variation of 15 minutes, 30 minutes, and 45 minutes holding time using water cooling media.
After conducting hot induction hardening and testing, various results were obtained. The variation of 15 minutes holding time obtained metallographic results with a percentage of 71% martensite, skin hardness of 47.5 HRC and average impact strength of 637.7 Kg/cm. The variation of 30 minutes holding time obtained metallographic results with a percentage of 43,1%, skin hardness of 47.5 HRC and impact strength of 567.8 Kg/cm then the variation of 45 minutes holding time obtained metallographic results with a percentage of 36,9% martensite, Hardness 48 HRC and impact strength 505.4 Kg /cm.
| Item Type: | Thesis (Diploma) |
|---|---|
| Additional Information: | RSMI 669.95 Ram a-1 2019 |
| Uncontrolled Keywords: | Car, Shaft, Induction Heater, Metallography, Impact, Hardness. |
| Subjects: | T Technology > TN Mining engineering. Metallurgy > TN690 Metallography. Physical metallurgy T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment T Technology > TS Manufactures |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering |
| Depositing User: | Ramadhan Cakra Januar |
| Date Deposited: | 19 Apr 2022 06:55 |
| Last Modified: | 19 Apr 2022 06:55 |
| URI: | http://repository.its.ac.id/id/eprint/62405 |
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