Firmansyah, Mohammad Rayhan Naufal (2025) Analisis Pengaruh Variasi Heat Treatment Pada Sambungan Las SMAW Plat Baja ST 60 Terhadap Kekuatan Tarik Dan Struktur Mikro. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pengelasan merupakan metode penggabungan material yang paling umum digunakan hampir di seluruh cabang industri. Salah satu material yang sering digunakan sebagai material utama dalam pengelasan adalah baja. Baja ST60 merupakan salah satu baja yang banyak digunakan di dunia industri seperti permesinan, jembatan, dan konstruksi umum lainnya. Baja ST60 juga umum digunakan di dunia industri maritim, terutama perkapalan. Untuk menjaga pengelasan baja tetap baik, kita dapat memberikan perlakuan panas berupa preheat yang dilakukan sebelum pengelasan dan post-weld heat treatment (PWHT) yang dilakukan setelah pengelasan. Penelitian ini bertujuan untuk mengetahui bagaimana perlakuan panas dapat berpengaruh terhadap kekuatan tarik dan struktur mikro pada pengelasan baja ST60 dengan menggunakan metode pengelasan SMAW (Shielded Metal Arc Welding). Suhu preheat yang digunakan adalah 216˚C serta variasi suhu PWHT yang digunakan adalah 300˚C dan 600˚C. Hasil penelitian ini dapat diperoleh melalui uji tarik, uji struktur makro, dan uji struktur mikro. Pada hasil pengujian tarik, pengelasan dengan PWHT 600˚C memiliki rata-rata ultimate tensile strength tertinggi, yaitu 641,37 Mpa. Sedangkan, pengelasan tanpa PWHT memiliki rata-rata ultimate tensile strength terendah, yaitu 613,73 Mpa. Hasil pengamatan struktur mikro menunjukkan setiap spesimen memiliki struktur ferrite dan pearlite. Spesimen dengan PWHT 600˚C memiliki kandungan pearlite paling banyak, yaitu 68,52%. Sedangkan, spesimen tanpa PWHT memiliki kandungan pearlite paling sedikit, yaitu 49,45%. ====================================================================================================================================
Welding is the most common method of joining materials used in almost all branches of industry. One of the materials that is often used as the main material in welding is steel. ST60 steel is one of the steels that is widely used in the industrial world such as machinery, bridges, and other general construction. ST60 steel is also commonly used in the world of the maritime industry, especially shipping. To keep the steel welding good, we can provide heat treatment in the form of preheat carried out before welding and post-weld heat treatment (PWHT) carried out after welding. This study aims to find out how heat treatment can affect the tensile strength and microstructure of ST60 steel welding using the SMAW (Shielded Metal Arc Welding) welding method. The preheat temperature used is 216°C and the PWHT temperature variation used is 300°C and 600°C. The results of this study can be obtained through tensile tests, macro structure tests, and microstructure tests. In the tensile test results, welding with PWHT 600°C has the highest average ultimate tensile strength, which is 641,37 Mpa. Meanwhile, welding without PWHT has the lowest average ultimate tensile strength, which is 613,73 Mpa. The results of microstructure observation showed that each specimen had a ferrite and pearlite structure. Specimens with PWHT 600°C had the most pearlite content, which was 68.52%. Meanwhile, specimens without PWHT have the least pearlite content, which is 49.45%.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Baja ST60, Heat Treatment, SMAW, ST60 Steel, Heat Treatment, SMAW. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.16 Materials--Testing. T Technology > TA Engineering (General). Civil engineering (General) > TA492.W4 Welded joints T Technology > TC Hydraulic engineering. Ocean engineering > TC1665 Offshore structures--Materials. T Technology > TN Mining engineering. Metallurgy > TN690 Metallography. Physical metallurgy T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment T Technology > TS Manufactures > TS227 Welding. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Mohammad Rayhan Naufal Firmansyah |
| Date Deposited: | 18 Jun 2025 06:36 |
| Last Modified: | 18 Jun 2025 07:23 |
| URI: | http://repository.its.ac.id/id/eprint/119189 |
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