ANALISIS PENGARUH KADAR GARAM PADA PENDINGINAN PACK CARBURIZING BAJA SS400 DITINJAU DARI UJI KEKUATAN IMPACT DAN KEKERASAN

Abstract

The purpose of this study was to ascertain how the cooling of SS400 steel from pack carburizing was impacted by the salinity of the salt water in terms of the impact strength and steel hardness test findings. To determine the hardness and toughness value of SS400 steel as a substitute for high carbon steel in dodos, impact testing and steel hardness are required. The experimental approach is used in this study. SS400 steel was cut in accordance with the test specimen design intended for this investigation. After the steel has been cut, it is pack carburized using a coconut shell and CaCO3 catalyst mixture. It is then cooled using salt water that varies in salt content from 15% to 35%. After cooling, a few test specimens were put through impact and hardness testing. Impact and hardness tests were performed on a few of the other test specimens following their cooling, tempering, and cooling with plain water. According to the study's findings, the cooling effects of salt water salinity at 15%, 25%, and 35% have a substantial impact on the outcomes of hardness and impact tests. The hardness test findings show a 25% rise and a 35% drop. In contrast, the SS400 steel impact test results rose by 35% and fell by 25%.