HEAT TREATMENT BAJA TAHAN KARAT AISI 430, KAJIAN MICROSTRUCTURE AND HARDNESS SEBAGAI MATERIAL BIOMEDIS

Perdamean Sebayang, Achmad Maulana Soehada S., Ukfan Dwi Cahya Harefa, Alfirano ., Toto Sudiro, Didik Aryanto

Abstract


The heat treatment of AISI-430 steel was carried out in inert gas Nitrogen atmosphere at 1200 C and elevated pressures of 300, 400 and 500 Psi for 5 and 7 hours, respectively. In this experiment, the microstructure and hardness (HV) of the sample were analyzed. The structure analysis consists of optical microscope, scanning electron microscope equipped with energy dispersive X-ray spectometer (SEM-EDS) and X-ray diffraction (XRD). The results show that the optimum condition for the heat treatment was achieved at o 1200C for 7 h and inert gas Nitrogen pressure of 500 Psi. At the aforesaid condition, the Nitrogen element was uniformly distributed on the sample surface with concentration of 29.7 wt%. The fraction of austenitic phase is about 9.69 wt% and the hardness of material increases from 161.8 to 547.15 HV. The results of this study suggests that the materials can be considered to be used for biomedical applications as implant material. 

 

Keywords: austenite, heat treatment, high resistant steel AISI-430, biomedical, Nitrogen 

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