Microstructure Change in ASSAB 760 Steel during Cementation and Quenching Process

Abstract:

The purpose of this research was to study the microstructure change of ASSAB 760 (equivalent to AISI 1045 and JIS S45C) steel subjected to the gas cementation and the quenching process. Gas cementation is a heat treatment surface process by means of carbon diffusing into steel. This process is carried out in a furnace in a fluidized bed by using media of liquid petroleum gas (LPG) and nitrogen gas at a temperature of 1203 K and various holding times of 7.2, 10.8 and 14.4 ks, respectively. The rapid quenching process is carried out in oil media for 420 sec. The results shows, that remnant austenite is formed on the specimen with a holding time of 7.2 ks and the networks of existing bainite structure are clearly spread on the specimen with holding time of 10.8 and 14.4 ks. Additionally, this gas cementation process when followed by the quenching process is effective in forming the martensite and austenite microstructures.

• Periodical: Materials Science Forum (Volume 872)
• Pages: 50-54
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.872.50
• Online since: September 2016
• Authors: Lydia Anggraini*, Muhammad Adikusumo, Rosfian Arsyah Dahar
• Keywords: ASSAB 760 Carbon Steel, Cementation, Holding Time, Microstructure, Quenching

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