Eko Pujiyulianto, Fransisco Dino Permadi, Abdul Muhyi, Kardo Rajagukguk, Fajar Paundra
The purpose of this study was to determine the effect of variations in intercritical annealing temperature on the material characteristics of AISI 1020 steel. The heat treatment process was carried out in a furnace with temperature variations of 673°C, 723°C, 773°C, 823°C, and 873°C. Cooling process with new oil medium SAE 20W-50. The testing process carried out is the microstructure test, hardness and tensile test. The microstructure test results obtained on RAW material and intercritical annealing at temperatures of 673°C to 773°C contained ferrite and pearlite phases, while at temperatures of 823°C and 873°C there were phases namely ferrite and pearlite, but there was Acicular ferrite. The result of the hardness value on RAW material is 189.66 HBN, and the highest increase in hardness occurs at a temperature of 873°C with a value of 181.89 HBN. The result of the tensile strength of RAW material is 207.3?MPa and after the intercritical annealing process the highest tensile strength value is at 873 °C which is 205.55?MPa. Then for the increased length of the RAW material it is 5.62% and there is an increase at a temperature of 873°C with a yield of 8.84%. The result of this research is the increased ductility of AISI 1020 steel. © 2025 Author(s).
Department of Mechanical Engineering, Institut Teknologi Sumatera (ITERA), Lampung, South Lampung, 35365, Indonesia