Pengaruh media pendingin dan waktu pada perlakuan pack carburizing-quenching baja karbon rendah SS400

Sujita, Sujita (2021) Pengaruh media pendingin dan waktu pada perlakuan pack carburizing-quenching baja karbon rendah SS400. Dinamika Teknik Mesin Jurnal Keilmuan dan Terapan Teknik Mesin, 11 (2). pp. 116-123. ISSN 2088-088X

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The SS400 steel is widely used in the agricultural equipment industry because of its specific properties, malleability good corrosion resistance, and high strength to weight ratio. However, according to several research results it has several weaknesses, low surface hardness, ductility and wear resistance. Therefore, it is necessary to improve its mechanical properties so that the agricultural equipment products produced are of better quality. The purpose of this study was to determine the effect of variations in time and cooling media in the pack carburizing-quenching treatment of SS400 steel specimens. The pack carburizng treatment was carried out at a temperature of 875 ºC, 90 minutes, the carburizing medium was a mixture of corncob charcoal and Picntada maxima shell powder, with a composition of 70%:30%, followed by a quenching process with variations in time and cooling medium (water, oil SAE 40, cane molasses 10% and cane molasses 30%). The results of the study showed that the time and cooling medium affected the surface hardness, ductility and microstructure of the specimens With 30% cane molasses cooling medium, quenching time of 4 minutes the largest specimen absobed impact energy is 2.23 J/mm2. On the other hand, the lowest surface hardness number is 285 Kg/mm2.The increased ductility causes the cracking marks to disappear on the specimen surface. Based on observations with SEM, there is a decomposition of the martensite structure coarser grain sizes.

Item Type: Article
Keywords (Kata Kunci): Pack carburizing- Quenching cooling medium Surface hardness number Ductility
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Fakultas Teknik
Depositing User: Dr. Sujita Darmo
Date Deposited: 17 Jan 2022 00:25
Last Modified: 17 Jan 2022 00:25

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