Analisa Kekerasan Permukaan Baja ST 40 Setelah Carburizing Dengan Luas Rata-rata Partikel Karbon 115,103 μm² DAN 515,735 μm²

Pramanda, Wibi and -, Ir. Ngafwan, MT. (2020) Analisa Kekerasan Permukaan Baja ST 40 Setelah Carburizing Dengan Luas Rata-rata Partikel Karbon 115,103 μm² DAN 515,735 μm². Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

Carburizing is a steel hardening technique by adding carbon to the steel with austenite temperature. The purpose of this research is to look at changes in microstructure that occur as well as changes in the value of surface hardness in steel. This research uses ST 40 steel and carbon with 115.103 μm² and 515,735 μm² carbon particles. Steel and carbon are put into a container, tightly closed and heated at 780 ° C for 4 hours. Carburizing specimens testing include carbon particle analysis, microstructure test and vickers hardness test. After the carburizing process, there was a reduction in the area of carbon particles from 115,103 μm² to 110,051 μm² and 515,735 μm² to 440,058 μm². in microstructure testing, ferrite is alpha (α) while pearlite is symbolized (β). Raw material produces an average solubility of elements in Fe (β%) 5.99%. The solubility of the carburizing material with a carbon size of 515,103 μm² was 14.19%. Solubility of the carburizing material with a carbon size of 115.103 μm² by 23,49%. In hardness testing, raw material produces 263.3 kg/mm² hardness. Carburizing uses an average area of 115.103 μm carbon particles resulting in a hardness of 249,68 kg / mm², while carburizing uses an average area of carbon particles 515.735 μm² producing a hardness of 193.7 Kg / mm².

Item Type:	Karya ilmiah (Skripsi)
Uncontrolled Keywords:	carburizing, partikel karbon 115,103 μm², temperatur, struktur mikro, kekerasan
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Fakultas Teknik > Teknik Mesin
Depositing User:	WIBI PRAMANDA
Date Deposited:	22 Aug 2020 04:37
Last Modified:	22 Aug 2020 04:37
URI:	http://eprints.ums.ac.id/id/eprint/85299

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