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All Journal Accurate: Journal of Mechanical Engineering and Science
Daryono
Politeknik Negeri Pontianak
Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Kuat Arus Las Terhadap Sifat Mekanis dan Struktur Mikro Sambungan Las Besi Tuang Kelabu menggunakan Elektroda Nikel dengan Proses Pengelasan SMAW Daryono; Topan Prihantoro; Ady Setiawan
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 1 (2021): April 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i1.585

Abstract

This study aims to determine the effect of welding current on the mechanical properties and microstructure of gray cast iron welding joints using nickel electrodes with the SMAW welding process. The research method used was experimental study, starting with preparing the workpiece, welding process, making test specimens and testing the weld specimens. The material to be joined is gray cast iron metal with a butt joint of a 60 ° open seam V open angle. The welding process used uses SMAW with a current of 80 Amperes, 85 Amperes and 90 Amperes. The added material used was an ENiFe-Cl type CIN 2 electrode with a diameter of 2.6 mm. Hardness testing was carried out using the Vickers method and microstructure testing using an optical microscope. The results showed that the maximum hardness value of the parent metal occurred at the welding current strength of 85 Amperes, which was 192.17 VHN, then the maximum hardness value of the HAZ area occurred at the welding current strength of 85 Amperes, which was 203.46 VHN, while the maximumhardness value of the weld metal was 203.46 VHN. metal) occurred at a welding current of 90 Amperes, which was 211.18 VHN. The results of the microstructure observation showed that the matrix formed on the parent metal was pearlite withgraphite in the form of flakes. The micro structure formed in the HAZ area was a martensite structure. Meanwhile, the microstructure of weld metal consists of an austenite matrix with an even distribution of graphite particles.
Analisa Variasi Putaran Friction Welding Terhadap Kekerasan Logam Aluminium Paduan Seri 1100-H18 Daryono; Dwi Handoko; Topan Prihantono; Ady Setiawan
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 2 (2022): October 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i2.1494

Abstract

Research in aluminum splicing continues to be improved, so that the joining process becomes easier and to increase hardness. Friction stir welding (FSW) aluminum joining process. The purpose of this study was to find out more clearly about the mechanical properties of the hardness of the specimen. The material used is aluminum alloy 1100-H18 series. The research method is friction welding with Vertical Milling as a turning tool. The tests were carried out in different rounds, namely; 660 rpm; 1115 rpm; 1750 rpm and 2720 rpm with a fixed tool feed rate of 20 mm/minute. The results of the Vickers test show that the hardness of the Base Metal (BM) area at 660 rpm is the highest at 101.4 and the lowest is 97.62 at 1115 rpm. The highest average hardness value of 94.98 occurs at 1115 rpm and the lowest is 75.18 at 2720 rpm. A significant effect on the hardness of the specimen due to the rotational speed of the tool spindle (electrode), the higher the rotation, the higher the heat generated and the rate of The slow cooling in the HAZ and SZ regions will be greater, as a result the hardness in the HAZ and SZ regions will decrease.
Co-Authors Ady Setiawan Ady Setiawan Dwi Handoko Topan Prihantono Topan Prihantoro