Alfaisz, Sukarno (2024) Analisis Pengaruh Heat Treatment Normalizing dengan Variasi Waktu Tahan Terhadap Kekerasan dan Struktur Mikro Baja Karbon Rendah. Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.
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Abstract
Pelat baja profil ST 37 yang digunakan dalam penelitian ini, yaitu waktu penahanan dan suhu perlakuan panas, waktu penahanan (20 menit, 25 menit, 30 menit) diikuti suhu perlakuan panas (850 °C, 870 °C dan 900℃). Dilihat dari hasil uji kekerasan Rockwell, hasilnya terus meningkat dengan adanya perubahan waktu penahanan 20 menit, 25 menit, dan 30 menit, serta media pendingin udara/pendingin internal, dari keadaan tanpa perlakuan menjadi setelah perlakuan normalisasi, dan mencapai kekerasan maksimal. Nilai kekerasan tertinggi diperoleh pada kondisi normalisasi 850 °C dan waktu penahanan diubah menjadi 20 menit dalam media pendingin udara pada 60 HRC. Nilai kekerasan terendah diperoleh yaitu 36,1 HRC untuk kondisi pemrosesan pada suhu 900 °C. Dapat disimpulkan bahwa perubahan waktu tahan dan media pendingin berpengaruh terhadap penurunan kekerasan. Pengamatan struktur mikro menunjukkan bahwa fasa perlit semakin berkurang seiring bertambahnya waktu tahan. Pada suhu 900 °C, variasi waktu retensi air pendingin selama 20 menit menghasilkan persentase fasa perlit terendah yaitu 42%. Semakin rendah persentasenya, semakin banyak fasa perlitnya dan semakin ulet materialnya. kata kunci:Normalizing, Sruktur Mikro, Hardness
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Normalizing, Sruktur Mikro, Hardness |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures |
| Divisions: | Fakultas Teknik > Program Studi Teknik Mesin |
| Depositing User: | 1421800015 Sukarno Alfaisz |
| Date Deposited: | 17 Jun 2026 07:34 |
| Last Modified: | 17 Jun 2026 07:34 |
| URI: | http://repository.untag-sby.ac.id/id/eprint/34787 |
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