Jidan, Muhtasor (2024) STUDI DAKTILITAS PANAS (HOT DUCTILITY) DAN FRAKTOGRAFI BAJA 3% SILIKON PADA TEMPERATUR 850⁰C, 900⁰C, 950⁰C. S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa.
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Abstract
Electric steel is a steel with low carbon content used for transformer cores and laminates of electric motors. This steel contains silicon (sometimes it contains aluminum). This steel is much needed along with the increasing use of electrical tools. One of the methods of forming this steel is the continuous casting method because it can produce products quickly and uniformly, but there is a problem in the process, namely the existence of transverse cracking in the casting straightening process. Based on this, a hot ductility study was conducted with 3% Si steel test material with three other different composition specimens. The research method carried out is by the solution treatment process to a temperature of 1100⁰C then a temperature decrease to 850⁰C, 900⁰C, and 950⁰C and a heat attraction test is carried out for each test temperature. The results obtained are tensile test curves and hot ductility of each specimen. In the tensile test curve, there is a decrease in tensile strength as the test temperature increases. This is because the interaction between atoms is getting weaker. The Hot ductility value of each specimen varies with the highest ductility value being in the C2 specimen with a value of 97,40% at a test temperature of 850⁰C, a test temperature of 900⁰C having a ductility value of 99,17% and a ductility value of 98,63% at a test temperature of 950⁰C. Another factor that affects the ductility value is the percentage of α-Fe or ferrite which can be seen from C3 specimens which have a higher percentage of austenite while the percentage of ferrite is lower than other specimens. Each specimen experiences ductile fracture with a ductility value of more than 70% which indicates that each specimen has superior hot working.
| Item Type: | Thesis (S1) | |||||||||
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| Additional Information: | Baja listrik merupakan baja dengan kadar karbon rendah yang digunakan untuk inti transformator dan laminasi motor listrik. Baja ini mengandung silikon (terkadang mengandung aluminium). Baja ini banyak dibutuhkan seiring dengan peningkatan penggunaan alat-alat kelistrikan. Salah satu metode pembentukan baja ini adalah metode continuous casting karena dapat menghasilkan produk cepat dan seragam, namun terdapat permasalah dalam prosesnya yaitu adanya transverse cracking pada proses pelurusan (straightening) pengecoran. Berdasarkan hal tersebut dilakukan penelitian studi hot ductility dengan material uji baja 3% Si dengan tiga spesimen berbeda komposisi lainnya. Metode penelitian yang dilakukan adalah dengan proses solution treatment hingga temperatur 1100⁰C kemudian penurunan temperatur hingga 850⁰C, 900⁰C, dan 950⁰C dan dilakukan uji tarik panas untuk masing-masing suhu uji. Hasil yang didapat adalah kurva uji tarik dan hot ductility tiap spesimen. Pada kurva uji tarik terjadi penurunan kekuatan tarik seiring dengan naiknya temperatur uji. Hal ini disebabkan karena interaksi antar atom semakin melemah. Nilai hot ductility tiap spesimen beragam dengan nilai daktilitas tertinggi berada pada spesimen C2 dengan nilai 97,40% pada temperatur pengujian 850⁰C , temperatur pengujian 900⁰C memiliki nilai daktilitas 99,17% dan nilai daktilitas 98,63% pada temperatur pengujian 950⁰C. Faktor lain yang mempengaruhi nilai daktilitas adalah persentase α-Fe atau ferit yang hal ini dapat terlihat dari spesimen C3 yang memiliki persentase austenit yang lebih tinggi sedangkan persentase ferit lebih rendah dibandingkan spesimen lain. Tiap spesimen mengalami perpatahan ulet dengan nilai daktilitas lebih dari 70% yang menandakan tiap spesimen memiliki hot working yang unggul. | |||||||||
| Subjects: | T Technology > T Technology (General) T Technology > TN Mining engineering. Metallurgy |
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| Divisions: | 03-Fakultas Teknik 03-Fakultas Teknik > 27201-Jurusan Teknik Metalurgi |
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| Depositing User: | Mr Muhtasor Jidan | |||||||||
| Date Deposited: | 07 Jun 2024 11:20 | |||||||||
| Last Modified: | 13 Jun 2024 10:52 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/35977 |
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