Analisa Heat Input Terhadap Kekerasan Material API 2W GR 50

Cahyadi, Fajar Putra (2022) Analisa Heat Input Terhadap Kekerasan Material API 2W GR 50. Project Report. [s.n.], [s.l.].

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Abstract

Studi ini berfokus pada evaluasi proses pengelasan dengan mempertimbangkan parameter penting, yaitu heat input, pada setiap layer. Pengelasan menggunakan berbagai jenis elektroda (SMAW dengan elektroda E7016 dan E7018, serta FCAW-GS dengan elektroda E81T1-G) untuk menghasilkan pengelasan yang optimal. Hasil perhitungan menunjukkan bahwa heat input yang tepat pada root layer, hot pass, fill layer, dan cap layer adalah 1.88 – 2.90 KJ/mm, 2.00 – 2.79 KJ/mm, 1.14 – 1.71 KJ/mm, dan 0.98 – 1.42 KJ/mm, secara berurutan. Selanjutnya, hasil pengelasan mengungkapkan bahwa nilai hardness base metal berada di bawah daerah HAZ dan weld metal. Hal ini menandakan bahwa HAZ dan weld metal mengalami dampak panas dan mengalami transformasi menjadi austenit dengan ukuran yang lebih kecil, menghasilkan tingkat kekerasan yang lebih tinggi dibandingkan dengan base metal. Rata-rata nilai hardness pada daerah base metal, HAZ, dan weld metal adalah 150.5 HV10, 206.60 HV10, dan 208.67 HV10, masing-masing.
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This study focuses on the evaluation of the welding process, considering the critical parameter of heat input for each layer. Various types of electrodes (SMAW with electrodes E7016 and E7018, as well as FCAW-GS with electrode E81T1-G) were used to achieve optimal welding results. The calculated results indicate that the appropriate heat input for the root layer, hot pass, fill layer, and cap layer are 1.88 – 2.90 KJ/mm, 2.00 – 2.79 KJ/mm, 1.14 – 1.71 KJ/mm, and 0.98 – 1.42 KJ/mm, respectively. Furthermore, the welding outcomes reveal that the hardness value of the base metal is lower than that of the Heat Affected Zone (HAZ) and weld metal. This indicates that the HAZ and weld metal experience heat impact and undergo transformation into smaller-sized austenite, resulting in higher hardness levels compared to the base metal. The average hardness values in the base metal, HAZ, and weld metal regions are 150.5 HV10, 206.60 HV10, and 208.67 HV10, respectively.

Item Type:	Monograph (Project Report)
Uncontrolled Keywords:	Heat Input, Pengelasan, FCAW, SMAW, Multipass,Heat Input, Welding, FCAW, SMAW, Multipass,
Subjects:	T Technology > TS Manufactures > TS227 Welding.
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering
Depositing User:	Fajar Putra Cahyadi
Date Deposited:	26 Jul 2023 04:27
Last Modified:	26 Jul 2023 04:27
URI:	http://repository.its.ac.id/id/eprint/100014

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