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All Journal Journal of Applied Science, Engineering and Technology (J. ASET) Jurnal Polimesin
Irza Sukmana
University of Lampung
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Effect of Full Annealing and Single Quenching-Tempering Heat Treatment on the Mechanical Properties of JIS SUP 9A Steel Andreas Luki Indratmoko; Irza Sukmana; Mohammad Badaruddin
Jurnal POLIMESIN Vol 21, No 2 (2023): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i2.3523

Abstract

JIS SUP 9A leaf spring steel under hot-forging conditions was subjected to full annealing (FA) and single step-quenching-tempering heat treatments (SQT). Tensile test specimens to ASTM E 8 standards have been prepared. The FA process was performed by heating all specimens in the furnace at a constant temperature of 800°C for 2 hours, followed by cooling in the furnace. Then, all test specimens were heat-treated SQT. The SQT process was carried out by heating all samples in a furnace at 800°C for 1 hour and 650°C for 1 hour, each followed by immersion in crude palm oil (CPO) media at a liquid temperature of 70°C until the specimens reached 100°C. The FA process removes internal stresses with high microstructural softness and SQT produces a fine martensitic phase microstructure, which improves mechanical strength (tensile strength and impact strength) with good ductility. Electron and scanning microscopy have been used to determine the concentration of impurities and microstructural changes in relation to the mechanical properties of the specimen concerned. The results showed that the yield limit, maximum tensile stress, and impact energy increased by 113.5%, 16.3%, and 705.2%, respectively. However, hardness decreased by 18.8% for SQT specimens against FA after heat treatment. This research utilizes industrial waste, which is available quite a lot; in the future, it will become an alternative for handling environmental problems. The abundant availability of raw materials and resulting strength-toughness are the main advantages of this heat treatment
The Influence of P2 and PC3 Polygonal Shaft Machining Parameters on the Quality of Machining Results Using a Mazak CNC Type QTE 200-MY SG Syahrul Rhamadhan; Irza Sukmana; Rizal Adi Saputra; Novrinaldi
Journal of Applied Science, Engineering and Technology Vol. 5 No. 2 (2025): December 2025
Publisher : INSTEP Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/jaset.v5i2.95

Abstract

Shafts are vital components in mechanical systems that function to transmit motion to elements such as rotors and gears. Although keyed and splined joints are commonly used due to their ease of manufacturing, polygonal shafts of the P2 and PC3 types according to DIN standards offer advantages in transmission efficiency and torque resistance. This study focuses on the CAD modeling, CAM simulation, and CNC machining of P2- and PC3-type coupling shafts. The modeling was carried out using SolidWorks based on DIN standard dimensions, while the CAM simulation was conducted using Esprit TNG. The machining process employed a Mazak CNC QTE 200-MY SG machine with parameter variations based on material type (carbon steel and stainless steel). Evaluation was performed through surface roughness measurements using a surface roughness tester and dimensional inspection using a Coordinate Measuring Machine (CMM). The results show that the toolpath runs optimally, and the depth of cut (DoC) has a significant effect on surface quality. A smaller DoC produces a smoother surface but requires longer machining time, whereas a larger DoC speeds up the process but reduces surface quality. Dimensional deviations from the CAD design are suspected to be caused by suboptimal quantity and distribution of reference points during CMM measurement.
Co-Authors Andreas Luki Indratmoko Mohammad Badaruddin Novrinaldi Rizal Adi Saputra Syahrul Rhamadhan