PENGARUH KUAT ARUS PENGELASAN GMAW TERHADAP KEDALAMAN PENETRASI DAN KEKERASAN BAJA ST-37 PADA DAERAH HEAT AFFECTED ZONE
Effect of GMAW Welding Current on Penetration Depth and Hardness of ST-37 Steel in Heat Affected Zone Area
Abstract
The selection of proper current is closely related to the depth of penetration of welds on metal and will affect the mechanical properties of the resulting welded joints. The purpose of this study was to determine the effect of current on penetration depth, welding width, and hardness in the Heat Affected Zone (HAZ). The research method used is experimental with currents of 180 A, 200 A, and 220 A. Welding is done on ST-37 steel using the GMAW welding technique. Penetration depth for components 1 and 2 with a current of 180 A are 0.77 mm and 0.78 mm, respectively, at a current of 200 A are 1.29 mm and 1.06 mm, and in 220 A are 1 .52 mm and 1.44 mm. The resulting welding width for 180 A is 5.86 mm, at 200 A is 6.70 mm, and at 220 A is 7.35 mm. Meanwhile, the hardness of the HAZ area shows that at a current of 180 A the hardness is 122 HV, while for a current of 200 A and 220 A the hardness is 120.5 HV. The quality standard of welded joints at each current indicates that the resulting penetration depth is more than 20%, so it can be said that the welding process has met the minimum standards.
References
D. Setiawan, “Analisa Cacat Las pada Pengelasan Smaw Butt Joint dengan Variasi Arus,” J. Tek. Mesin, vol. 2, no. 2, pp. 53–62, 2019.
W. A. S. Laksono, “Analisa Kekuatan Tarik Aluminium 5083 Hasil Pengelasan GMAW Posisi 1G dengan Variasi Kuat Arus dan Debit Aliran Gas Pelindung,” Pap. Knowl. . Towar. a Media Hist. Doc., vol. 40, no. 1, pp. 21–30, 2014.
M. Syaf’i, “Analisa Kekuatan Welding dengan Membandingkan Kedalaman Penetrasi dan Besarnya Kampuh pada Komponen Sepeda Motor,” Semin. Nas. Inov. dan Apl. Teknol., vol. ISSN 2085-, pp. 218–222, 2018.
H. K. Sardjono, “Studi Sifat Mekanis dan Struktur Mikro pada Baja Din 1.7223 41crmo4 dengan Pengaruh Perlakuan Panas,” J. Ilm. Tek. Mesin, vol. 3, no. 1, pp. 42–50, 2009.
F. G. Lumbantobing, N. P. Ariyanto, N. Fitria, and P. Leksonowati, “Pengaruh Variasi Tegangan pada Pengelasan GMAW terhadap Kekerasan dan Penetrasi pada Material Low Carbon Steel,” 2015.
A. S. Fuad, “Pengaruh Variasi Pengelasan Ulang Gas Metal Arc Welding (GMAW) terhadap Struktur Mikro dan Kekerasan Material Baja St -37,” p. 58, 2017.
Matricola. Enrico, “Design and Analysis of a Low Power Electromechanical Actuator for a Landing Gear Extension / Retraction System,” p. 30, 2018.
A. Hijazi, “Liquid Penetrant Testing,” no. ASTM, pp. 1–11.
A. W. Prasetya, “Pengaruh Debit Gas Pelindung dan Tegangan Listrik terhadap Tingkat Kekerasan dan Struktur Mikro Sambungan Las GMAW pada Baja Karbon Sedang EMS-45,” 2017.
B. H. K. A. S. Mohruni, “Pengaruh Variasi Kecepatan dan Kuat Arus terhadap Kekerasan, Tegangan Tarik, dan Struktur Mikro Baja Karbon Rendah,” vol. 13, no. 1, pp. 1–8, 2013.
D. Prayitno, H. D. Hutagalung, and D. P. B. Aji, “Pengaruh Kuat Arus Listrik Pengelasan terhadap Kekerasan Lapisan Lasan pada Baja ASTM A316,” J. Din. Vokasional Tek. Mesin, vol. 3, no. 1, pp. 1–6, 2018, doi: 10.21831/dinamika.v3i1.19109.
R. Siswanto, “Pengaruh Bentuk Kampuh terhadap Panjang , Kedalaman Penetrasi dan Lebar,” J. Fis. FLUX, vol. 9, pp. 151–158, 2012.
