0817041014, Adelina S.E Sianturi (2012) PENGARUH VARIASI SUHU PEMANASAN DENGAN PENDINGINAN SECARA LAMBAT TERHADAP UJI BENDING DAN STRUKTUR MIKRO PADA BAJA PEGAS DAUN AISI 5140. Digital Library.
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Abstrak (Berisi Bastraknya saja, Judul dan Nama Tidak Boleh di Masukan)
Abstrak Telah dilakukan penelitian tentang pengaruh variasi suhu pemanasan dan pendinginan secara lambat terhadap uji bending dan struktur mikro pada baja pegas daun AISI 5140. Penelitian ini dilakukan untuk mengetahui komposisi kimia, struktur mikro dan keuletan baja pegas daun AISI 5140. Proses heat treatment diberikan dengan variasi suhu pemanasan 750 oC, 800 oC dan 880 oC dengan holding time 60 menit kemudian didinginkan secara lambat. Uji komposisi kimia baja pegas daun AISI 5140 masuk kategori baja karbon sedang (0,42177 %C). Pada uji bending bahwa dengan proses pendinginan secara lambat menghasilkan baja dengan tingkat keuletan yang semakin tinggi tetapi semakin besar suhu austenisasinya maka tingkat kekuatan menahan beban semakin tinggi dan keuletannya semakin menurun. Dari hasil struktur mikro sampel baja pegas daun dengan pendinginan secara lambat menghasilkan butir-butir ferit dan perlit sedangkan pada baja yang original menghasilkan butir-butir martensit dan perlit dimana butir-butir perlit yang terlihat sangat halus dan sedikit dibanding fasa martensit. Kata kunci: Baja pegas daun, proses heat treatment, pendinginan secara lambat (annealing), uji bending, struktur mikro. Abstract A study was done concerning the effect of temperatures variations heating with annealing toward bending test and micro structure in leaf springs steel AISI 5140. The study was conducted to determine the chemical composition, microstructure and toughness leaf spring steel AISI 5140. The process of heat treatment was given temperatures variation heating 750 °C, 800 °C and 880 °C with holding time of 60 minutes and then cooled slowly. Test the chemical composition of leaf springs steel AISI 5140 included the category of medium carbon steel (0.42177% C). In the bending test with annealing process produced steels with higher levels of austenite ductility temperature but the greater level of the higher loaded the bearing strength and the tenacity decreased. The results of the micro structure sample of leaf spring steel with annealing, it produced grains of ferrite and pearlite, while the original steel was producing grains of martensite and pearlite pearlite grains which looked very smooth and less than the martensite phase. Key words: leaf spring steel, heat treatment process, annealing, bending test, micro structure. .
| Jenis Karya Akhir: | Artikel |
|---|---|
| Subyek: | |
| Program Studi: | FAKULTAS MIPA > Prodi Fisika |
| Pengguna Deposit: | IC-STAR . 2015 |
| Date Deposited: | 05 Nov 2015 06:43 |
| Terakhir diubah: | 05 Nov 2015 06:43 |
| URI: | http://digilib.unila.ac.id/id/eprint/14347 |
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