Effect of Transfer Time During Austempering of Nodular Cast Iron FCD 450

Sidharta, Indra and Berata, Wajan (2011) Effect of Transfer Time During Austempering of Nodular Cast Iron FCD 450. Jurnal Teknik Mesin, 11 (3). pp. 208-214. ISSN 1411-9471

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Abstract

Austempered Ductile Iron (ADI) requires accurate process control regarding temperature and
time. In reality however, there is one parameter that is often disregarded. The parameter is transfer
time, i.e. time that is used to transfer nodular cast iron from austinizing furnace into salt bath
furnace. The aim of the experiment is to investigate the effect of transfer time on the mechanical
properties and microstructures of austempered nodular cast iron FCD 450. The FCD 450 was
austenized at 900°C for 1 hour, then transferred to a salt bath furnace for austempering process
with transfer time variation of 15, 68, and 120 seconds. Austempering was carried out at 316°C for
1 hour. Results showed that longer transfer time tended to decrease the hardness and impact energy
of the austempered FCD 450.The tendency rose from the decrease of bainite content due to the
longer transfer time as indicated by the microstructures.

Item Type:	Article
Additional Information:	671.36 Sid e
Uncontrolled Keywords:	nodular cast iron, transfer time, austempering, bainite
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment
Divisions:	Faculty of Industrial Technology > Mechanical Engineering
Depositing User:	INDRA SIDHARTA
Date Deposited:	22 May 2017 07:19
Last Modified:	28 Dec 2017 08:16
URI:	http://repository.its.ac.id/id/eprint/41322

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