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    Pengaruh Konsentrasi Silikon (Si) terhadap Sifat Mekanik Baja Karbon Rendah

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    Date
    2011
    Author
    Solin, Poibe
    Advisor(s)
    Marlianto, Eddy
    Justinon
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    Abstract
    Has done research on the influence of silicon (Si) on the mechanical properties of low carbon steels by varying the presentation of the element silicon (Si). Raw materials with the composition of SC 37 is melted in electric induction furnaces and presentation elements silicon (Si) was varied as much as five variations, namely: v = 0.20%, v = 0.30%, v= 0.40%, v = 0. 50%, and v = 0.60%, respectively 123 45casted in sand molds. Samples are produced through the variation of the percentage of the element silicon (Si) tested to see its mechanical properties tensile testing, hardness, impact, and metalography. Data obtained from the test results were analyzed, so that can know the influence of the percentage of the element silicon (Si) on low carbon steel. From the results of tensile testing is known that the lowest tensile strength at a concentration of 0.20% is 323.16 kN/mm and most severe at 2concentrations of 0.60%, is 341.37 kN/mm. To test the hardness concentration of 20.20% was 57.7 HRB and the concentration of 0.60% was 63.1 HRB. Concentration of 0.20% for the impact value is 0.3037 joule/mm and concentration of 0.60% for the 2impact value is 0.2078 joule/mm. To metalography 200x magnification is etched 2with Nital 3% at a concentration of 0.20% the dark pearlite structure and the structure of ferrite and concentration of 0.60% light the amount of pearlite and ferrite little more.
     
    Telah dilakukan penelitian tentang pengaruh Silikon (Si) terhadap sifat mekanik baja karbon rendah dengan cara memvariasikan presentasi unsur Silikon (Si). Bahan baku dengan komposisi SC 37 dilebur pada tanur listrik induksi kemudian presentasi unsur Silikon (Si) divariasikan sebanyak lima variasi, yaitu: v1=0,20%, v2=0,30%, v3=0,40%, v4=0,50%, dan v5=0,60%, masing-masing dicor pada cetakan pasir. Sampel yang dihasilkan melalui variasi presentase unsur Silikon (Si) diuji untuk melihat sifat mekaniknya dilakukan pengujian tarik, kekerasan, impact, dan metalografi. Data yang diperoleh dari hasil pengujian kemudian dianalisa, sehingga dapat diketahui pengaruh presentase unsur Silikon (Si) pada baja karbon rendah. Dari hasil pengujian tarik diketahui bahwa kuat tarik paling rendah pada konsentrasi 0,20% adalah 323,16 kN/mm2 dan yang paling berat pada konsentrasi 0,60%, yaitu 341,37 kN/mm2. Untuk uji kekerasan konsentrasi 0,20% adalah 57,7 HRB dan konsentrasi 0,60% adalah 63,1 HRB. Untuk impact konsentrasi 0,20% bernilai impact 0,3037 joule/mm2 dan konsentrasi 0,60% bernilai impact 0,2078 joule/mm2. Untuk metalografi perbesaran 200x yang dietsa dengan Nital 3% pada konsentrasi 0,20% bagian struktur perlit gelap dan struktur ferit terang dan konsentrasi 0,60% jumlah perlit semakin banyak dan ferit sedikit.

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    http://repositori.usu.ac.id/handle/123456789/41470
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    Repositori Institusi Universitas Sumatera Utara (RI-USU)
    Universitas Sumatera Utara | Perpustakaan | Resource Guide | Katalog Perpustakaan
    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
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