Muhammad Daffa, Al'Azis (2022) PENGARUH VARIASI HEAT INPUT UNDERWATER WET WELDING MENGGUNAKAN ELECTRODE COATING E6013 TERHADAP SIFAT MEKANIK BAJA API 5L X65. S1 thesis, UNIVERSITAS SULTAN AGENG TIRTAYASA.

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Abstract

Underwater welding is one of the methods used in corrective maintenance in pipeline structures and offshore buildings, while one of the problems that occurs in Underwater wet welding is the heat input factor in underwater welding where in the Underwater wet welding process when welding is coated with cooling which quickly causes the stability of the arc to carry out metallurgical transfer to the seam area of the weld joint is disturbed and special electrodes for underwater welding are relatively expensive. In this study we conducted tests with variations of heat input of 11.31 kJ/mm, 15.44 kJ/mm and 19.33 kJ/mm, using the Underwater wet welding process using an electrode coating. The results for the heat input tensile strength test were 19.33 kJ/mm of 491.065 MPa, for the impact test at 11.31 kJ/mm heat input a value of 0.4793 kJ/mm2 was obtained and the largest average hardness value was for the weld metal area ie 15.44 kJ/mm heat input of 175.98 HV, HAZ area 15.44 kJ/mm heat input of 223.35 HV and base metal area of 19.33 kJ/mm heat input of 184.525 HV.

Item Type:	Thesis (S1)
Contributors:	Contribution Contributors NIP/NIM Thesis advisor Ipick, Setiawan 197705012003121001 Thesis advisor Agus, Pramono 197608182008011012
Additional Information:	Underwater welding adalah salah satu metode yang digunakan dalam perawatan korektif dalam struktur pipa dan bangunan lepas pantai, adapun Salah satu permasalahan yang terjadi dalam Underwater wet welding adalah faktor heat input dalam pengelasan bawah air yang dimana dalam proses Underwater wet welding ketika pengelasan melapisi dengan pendinginan yang cepat menyebabkan kestabilan busur melakukan transfer metalurgi ke daerah kampuh sambungan las terganggu dan elektroda khusus pengelasan bawah air relatif mahal. Dalam penelitian ini kami melakukan pengujian dengan variasi heat input 11,31 kJ/mm, 15,44 kJ/mm dan 19,33 kJ/mm, dengan proses Underwater wet welding menggunakan electrode coating. Didapatkan hasil untuk pengujian tensile strength heat input 19,33 kJ/mm sebesar 491,065 MPa, untuk pengujian impak pada heat input 11,31 kJ/mm diperoleh nilai sebesar 0,4793 kJ/mm2 dan nilai kekerasan rata-rata terbesar untuk daerah weld metal yaitu heat input 15,44 kJ/mm sebesar 175,98 HV, daerah HAZ yaitu heat input 15,44 kJ/mm sebesar 223,35 HV dan daerah base metal yaitu heat input 19,33 kJ/mm sebesar 184,525 HV.
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures
Divisions:	03-Fakultas Teknik 03-Fakultas Teknik > 21201-Jurusan Teknik Mesin
Depositing User:	Mr Muhammad Daffa Al'Azis
Date Deposited:	14 Dec 2022 15:03
Last Modified:	14 Dec 2022 15:03
URI:	http://eprints.untirta.ac.id/id/eprint/18380

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