Alfarizy, Haris Kahfi (2023) Analisis Pengaruh Variasi Tekanan dan Jarak Nozzle Terhadap Kekerasan dan Kekerasan Permukaan Proses Sandblasting Baja ST40. (Analysis of the Effect of Variations in Pressure and Nozzle Distance on the Hardness and Surface Hardness of the ST40 Steel Sandblasting Process). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.
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Abstract
Sandblasting adalah salah satu metode tercepat dan paling efesien untuk menghilangkan karat, oli, cat dan garam. Sandblastng adalah metode pembersihan permukaan yang menggunakan tekanan tinggi untuk menembakan partikel abrasif pada permukaan material untuk menyebabkan benturan, menghilangkan kontaminasi dan menciptakan kekasaran profil. Baja karbon rendah yang digunakan dalam penelitian ini adalah ST 40 yang berdimensi 5 mm x 100 mm x 100 mm, variasi tekanan 5 bar , 6 bar, 7 bar dan variasi jarak 40 cm, 70 cm, 100 cm. Pengujian yang dilakukan adalah uji kekasaran dan uji kekerasan. Penelitian ini mendapatkan hasil pada variasi 5 bar 100 cm memiliki kekasaran terendah dengan nilai rata-rata 58,66 μm. Sedangkan kekasaran tertinggi terdapat pada variasi 7 bar 40 cm dengan nilai rata-rata 104 μm. Pada proses sandblasting yang dilakukan mendapatkan nilai ketebalan yang semakin menurun di variasi 7 bar 40 cm memiliki nilai ketebalan rata-rata 4,77 mm. sedangkan variasi 5 bar 70 cm memiliki nilai ketebalan rata-rata 4,9 mm. Pada proses sandblasting yang dilakukan mendapatkan nilai kekerasan yang meningkat pada raw material yang awalnya sebelum disandblasting dengan nilai 71,9 HRB, pada kekerasan tertinggi terdapat pada variasi 7 bar 40 cm dengan nilai rata-rata 75,76 HRB. Sedangkan kekerasan terendah terdapat pada variasi 5 bar 40 cm dan 5 bar 70 cm dengan nilai rata-rata yang sama yaitu 73,6 HRB. Pada proses sandblasting yang dilakukan menghasilkan kebersihan yaitu Sa 2½. Kata kunci : sandblasting, tekanan, jarak, baja ST 40, kekasaran, kekerasan
Item Type: | Thesis (Undergraduate) |
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Subjects: | T Technology > TJ Mechanical engineering and machinery |
Divisions: | Fakultas Teknik > Program Studi Teknik Mesin |
Depositing User: | 1421900041 Haris Kahfi Alfarizy |
Date Deposited: | 26 Jul 2023 04:07 |
Last Modified: | 27 Jul 2023 04:04 |
URI: | http://repository.untag-sby.ac.id/id/eprint/25186 |
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