Effects of carburization time and temperature on the mechanical properties of carburized mild steel, using activated carbon as carburizer

Materials Research

Fatai Olufemi Aramide²  Simeon Ademola Ibitoye¹  Isiaka Oluwole Oladele²  Joseph Olatunde Borode¹ 

[1],Federal University of Technology Metallurgical and Materials Engineering Department Akure Ondo State ,Nigeria

关键词: packed carburization;    carburizing temperature;    activated carbon;    hardness;   

DOI  :  10.1590/S1516-14392009000400018

来源: SciELO

【 摘 要 】

Due to the complexity of controlling parameters in carburization, there has been relatively little work on process variables during the surface hardening process. This work focuses on the effects of the carburizing temperature and time on the mechanical properties of mild steel carburized with activated carbon, at 850, 900 and 950 ºC, soaked at the carburizing temperature for 15 and 30 minutes, quenched in oil, tempered at 550 ºC and held for 60 minutes. Prior carburization process, standard test samples were prepared from the as received specimen for tensile and impact tests. After carburization process, the test samples were subjected to the standard test and from the data obtained, ultimate tensile strength, engineering strain, impact strength, Youngs' moduli were calculated. The case and core hardness of the carburized tempered samples were measured. It was observed that the mechanical properties of mild steels were found to be strongly influenced by the process of carburization, carburizing temperature and soaking time at carburizing temperature. It was concluded that the optimum combination of mechanical properties is achieved at the carburizing temperature of 900 ºC followed by oil quenching and tempering at 550 ºC.

【 授权许可】

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