Hikmatullah, Chandra Wijaya (2023) Pengaruh Lingkungan Terhadap Proses Underwater Wet Welding Pada Baja API 5L X65 Menggunakan Elektroda E6013 Berbasis Coating Resin. S1 thesis, Universitas Sultan Ageng Tirtayasa.
![[img]](https://eprints.untirta.ac.id/style/images/fileicons/text.png) |
Text (Full Text)
Skripsi_Chandra Wijaya Hikmatullah_3331180027.pdf Restricted to Registered users only Download (7MB) |
|
Text (Bab 1 + Dapus)
Skripsi Bab 1 + Dapus.pdf Restricted to Registered users only Download (753kB) |
|
Text (Bab 2)
Bab 2.pdf Restricted to Registered users only Download (988kB) |
|
Text (Bab 3)
Bab 3.pdf Restricted to Registered users only Download (750kB) |
|
Text (Bab 4)
Bab 4.pdf Restricted to Registered users only Download (2MB) |
|
Text (Bab 5)
Bab 5.pdf Restricted to Registered users only Download (50kB) |
|
Text (Daftar Pustaka)
Dapus.pdf Restricted to Registered users only Download (124kB) |
|
Text (Lampiran)
Lampiran.pdf Restricted to Registered users only Download (2MB) |
|
Text (Turnitin)
Turnitin.pdf Restricted to Registered users only Download (164kB) |
Abstract
Underwater wet welding is used to repair structures that are submerged in water, such as offshore oil structures, underwater pipelines, wharves, and ships. The SMAW (Shielded Metal Arc Welding) welding method is commonly used in underwater wet welding processes. Because the price of special underwater welding electrodes is relatively expensive, conventional electrodes with polyester resin coating were created as an alternative to special underwater welding electrodes. In this study, using variable currents 60A, 90A, and 120A using E6013 electrodes with polyester resin coating to determine the effect of a humid/wet environment on the microstructure formed due to the underwater wet welding process that occurs on the surface area of weld metal, HAZ, and base metal. There is a deficiency of carbon (C) during the underwater wet welding process, each specimen in the weld area with each current variable used affects the microstructure formed and the hardness value. In the weld area, austenite and ferrite phases are formed and there is precipitation on the specimen using currents of 90A and 120A. Then, in the HAZ area, pearlite and ferrite phases are found for all current variables used when performing underwater wet welding. Whereas in the base metal area (API 5L X65 steel) for the microstructure is an alloy of austenite, ferrite and pearlite combined. The results of the hardness value in the hardness test obtained an average value at 60A current in the weld area of 165.85 HV, in the HAZ area of 175.55 HV, and in the base metal area of 180.325 HV. Then, at 90A the weld area is 175,975 HV, in the HAZ area is 223.35 HV, and in the base metal area is 176,275 HV. Next, in the current area of 120A, the welding area is 170,225 HV, in the HAZ area, it is 204,225 HV, and in the base metal area, it is 188,525 HV. Keywords: Coating, Phase, EDX, SEM, SMAW, Underwater, Welding
| Item Type: | Thesis (S1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Contributors: |
|
|||||||||
| Additional Information: | Underwater wet welding digunakan untuk memperbaiki pada struktrur kontruksi yang terendam air, seperti pada struktrur offshore oil, jaringan pipa bawah laut, dermaga, dan juga kapal. Metode pengelasan SMAW (Shielded Metal Arc Welding) biasa digunakan pada proses underwater wet welding. Karena harga elektroda khusus underwater welding yang relatif mahal, elektroda konvesional dengan coating resin polyester diciptakan sebagai alternatif pengganti elektroda khusus underwater welding. Pada penelitian ini, menggunakan variabel arus 60A, 90A, dan 120A menggunakan elektroda E6013 dengan coating resin polyester untuk mengetahui pengaruh lingkungan lembab/basah terhadap struktur mikro yang terbentuk karena proses underwater wet welding yang terjadi pada daerah permukaan weld metal, HAZ, serta base metal. Terjadi defisiensi karbon (C) saat proses pengelasan underwater wet welding, setiap spesimen pada daerah lasan dengan masing-masing variabel arus yang dipakai mempengaruhi struktur mikro yang terbentuk dan nilai kekerasan. Pada daerah weld terbentuk fasa austenit dan ferit serta terdapat precipitation pada spesimen menggunakan arus 90A dan 120A. Lalu, pada daerah HAZ banyak ditemukan fasa perlit dan ferit untuk semua variabel arus yang digunakan saat pengelasan underwater wet welding. Sedangkan pada daerah base metal (baja API 5L X65) untuk struktur mikronya adalah paduan gabungan austenit, ferit, dan perlit. Hasil nilai kekerasan pada uji kekerasan didapat nilai rata-rata pada arus 60A daerah weld sebesar 165,85 HV, pada daerah HAZ sebesar 175,55 HV, dan pada daerah base metal sebesar 180,325 HV. Lalu, pada arus 90A daerah weld sebesar 175,975 HV, pada daerah HAZ sebesar 223,35 HV, dan pada daerah base metal 176,275 HV. Berikutnya pada daerah arus 120A daerah weld sebesar 170,225 HV, pada daerah HAZ sebesar 204,225 HV, dan pada daerah base metal sebesar 188,525 HV. Kata Kunci: Coating, Fasa, EDX, SEM, SMAW, Underwater, Welding | |||||||||
| Subjects: | T Technology > TJ Mechanical engineering and machinery | |||||||||
| Divisions: | 03-Fakultas Teknik 03-Fakultas Teknik > 21201-Jurusan Teknik Mesin |
|||||||||
| Depositing User: | Mr Chandra Wijaya Hikmatullah | |||||||||
| Date Deposited: | 26 Jan 2023 09:22 | |||||||||
| Last Modified: | 07 Feb 2023 15:28 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/20231 |
Actions (login required)
 |
View Item |