Ulum, Masatoridul (2024) STUDI HOT DUCTILITY BAJA SILIKON (3%Si) PADA TEMPERATUR 1000 oC, 1050 oC, DAN 1100 oC. S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa.

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Abstract

Silicon steel is one of the materials in high demand due to the increasing need for electricity, given its excellent electrical properties. One of the most widely used methods for forming steel presently is continuous casting. Continuous casting is employed because it can yield uniform and high-quality steel. However, an issue arises during the straightening process, often resulting in transverse cracks. This study aims to predict the capability of 3% Si silicon steel when subjected to continuous casting using the hot tensile testing method. Through this method, the values of hot ductility and heat tensile strength can be determined to predict the properties of silicon steel during the continuous casting process. The specimens used consist of 3 types of 3% Si silicon steel with variations in silicon content and other elements. The specimens undergo a solution treatment at a temperature of 1100 °C, followed by hot tensile testing at temperatures of 1000 °C, 1050 °C, and 1100 °C, respectively. The results show that as the temperature increases, it leads to a decrease in the tensile strength of the specimens. This is caused by the increase in the average distance between atoms. The main factor influencing both the tensile strength and the value of hot ductility at the same temperature is the α-ferrite phase. A higher formation of the α-ferrite phase tends to decrease the tensile strength of the specimens. The specimen C1 exhibited the highest tensile strength value at 1000°C, measuring 16.5839 MPa. There's an inverse relationship observed in the hot ductility values, meaning that as the α-ferrite phase formation increases, the hot ductility value tends to increase. The highest hot ductility value was obtained from specimen C2, measuring 98.29375% at 1000 °C, 99.74605% at 1050 °C, and 95.73239% at 1100 °C. Overall, all specimens exhibit hot ductility values above 70%, indicating a predicted capability to withstand hot work and be relatively safe from transverse cracking defects during the continuous casting process. This observation is further supported by the type of ductile fractures observed in all specimens.

Item Type:	Thesis (S1)
Contributors:	Contribution Contributors NIP/NIM Thesis advisor Fitrullah, Muhammad 197804142006041002 Thesis advisor Aziz, Abdul 198003072005011002
Additional Information:	Baja silikon merupakan salah satu material yang banyak dibutuhkan seiring meningkatnya kebutuhan akan listrik karena sifatnya yang memiliki kemampuan listrik yang baik. Salah satu metode pembentukan baja yang paling banyak digunakan saat ini adalah continous casting. Metode continous casting digunakan karena dapat menghasilkan kualitas baja yang seragam dan bermutu tinggi. Namun terdapat permasalahan saat terjadi proses pelurusan yaitu sering terjadinya transverse crack. Penelitian ini bertujuan untuk memprediksi kemampuan baja silikon 3% Si Ketika dilakukan continous casting dengan menggunakan metode uji tarik panas. Dengan metode tersebut dapat diketahui nilai hot ductility dan kekuatan tarik panas yang dapat memprediksi sifat baja silikon ketika dilakukan proses continous casting. Spesimen yang digunakan adalah 3 jenis baja silikon 3%Si dengan perbedaan kadar silikon dan unsur lainnya. Spesimen dilakukan solution treatment hingga temperatur 1100 oC kemudian dilakukan uji tarik panas pada masing-masing temperatur 1000 oC, 1050 oC, dan 1100 oC. Hasilnya adalah semakin tinggi temperatur semakin menurunkan kekuatan tarik dari spesimen yang disebabkan karena jarak rata-rata antar atom meningkat. Kemudian faktor utama yang mempengaruhi kekuatan tarik dan nilai hot ductility pada temperatur yang sama adalah fasa α-ferit, dimana semakin tinggi fasa α-ferit yang terbentuk akan menurunkan kekuatan tarik spesimen dimana spesimen yang memperoleh nilai kekuatan tarik tertinggi terdapat pada spesimen C1 temperatur 1000 oC sebesar 16,5839 Mpa. Berbanding terbalik pada nilai hot ductility, yaitu semakin tinggi fasa α-ferit yang terbentuk maka nilai hot ductility akan semakin meningkat. Nilai hot ductility tertinggi diperoleh dari C2 yaitu sebesar 98,29375% pada 1000 oC, 99,74605 pada 1050 oC, dan 95,73239 pada 1100 oC. Secara keseluruhan, semua spesimen memiliki nilai hot ductility diatas 70% sehingga diprediksi memiliki kemampuan kerja panas dan aman dari cacat transverse cracking saat dilakukan proses continous casting,hal tersebut juga didukung dengan jenis patahan ulet yang dihasilkan pada semua spesimen.
Subjects:	T Technology > TN Mining engineering. Metallurgy T Technology > TS Manufactures
Divisions:	03-Fakultas Teknik 03-Fakultas Teknik > 27201-Jurusan Teknik Metalurgi
Depositing User:	Mr Masatoridul Ulum
Date Deposited:	29 Jan 2024 14:07
Last Modified:	29 Jan 2024 14:07
URI:	http://eprints.untirta.ac.id/id/eprint/32607

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