Pengaruh Preheat, Postheat dan Kecepatan Las Proses Pengelasan Gas Metal Arc Welding (GMAW) Baja AISI 1050 terhadap Nilai Kekerasan
Abstract
The purpose of this study was to determine the effect of preheat, reheating and welding speed on AISI 1050 steel using GMAW welding with a current of 130 A, a voltage of 20 volts, the preheat temperatures used were 250 C, 300 C, 350 C and reheating temperatures of 550 C, 600 C, 650 C, welding speed using automatic tools with speed variations of 2.5 mm/s, 4.5 mm/s, this study used an experimental method including preparation of tools and materials, specimen making, welding process and micro hardness testing of Vicker hardness later obtained The highest hardness result is 206.7 HV at a preheat temperature of 350 C plus a reheating temperature of 650 C with a welding speed of 2.5 mm/s and the lowest hardness value is at a preheat temperature of 300 C plus a reheating temperature of 600 C with a welding speed of 2.5 mm/s in the weld
metal, HAZ and base metal areas with the highest hardness values at a preheat temperature of 300 C plus a reheating of 600 C with a welding speed of 4.5 mm/s of 254.2 HV and 238.3 HV
References
Sonawan, H, Rochim S. 2006. Pengantar untuk memahami proses pengelasan logam. bandung: CV. alfabeta.
Harsono, W, toshie, O.2000. Teknologi pengelasan logam, jakarta: PT. paradnya paramita
M. S. Haryadi. 2016. Pengaruh pre dan post heating pada proses gas metal arc welding (GMAW) terhadap struktur mikro dan kekuatan tarik baja karbon AISI 1045, fakultas teknik, universitas negeri semarang.
P. P. D. L. Sumarn. 2013. Effect of Post Weld Heat Treatment on Carbon Steel AISI 1050 in Heat Effected
Zone. Advanced Materials Research, vol. 650 , no. 612-615, pp. 1 – 5.
B. E. Putra, 2018, Mengidentifikasi Welding Procedure Specification (WPS), [Online]. tersedia: https://blkserang.kemnaker.go.id/digilib/index.php?p=fstream pdf&fid=215&bid=69. [diakses pada 24 november
.
The American society of testing and materials, ASTM E384 standard test method for microindentation
hardness of materials, The American society of testing and materials, (2003)
George, E. Deter, jr. 1961. Mechanical metallurgy. New york: McGRAW HILL BOOK COMPANY.
saifudin. 2011. Pengaruh preheat baja tak sejenis antara baja karbon rendah ASTM A36 dan baja tahan karat
austenite AISI 304 terhadap sifat mekanik”, jurnal rekayassa mesin
Savero Irvansyah. “pengaruh aplikasi preheat dan PWHT pada pengelasan baja karbon rendah ASTM A36 las FCAW menggunakan backing material terhadap sifat mekanik kekerasan".
Heri, W. dkk. (2016). Pengaruh heat input terhadap kekuatan mekanis dan struktur mikro hasil pengelasan
GMAW pada baja ASTM A36.
