Variasi Arus Listrik Terhadap Sifat Mekanik Mikro Sambungan Las Baja Tahan Karat Aisi 304

Yunus Yakub • Media Nofri
Journal article Widya Eksakta • 2018

Abstract

The research underlies on the fact that stainless steel is a high alloy steel; the welding connection quality is strongly influenced and become brittle by welding heat and atmosphere. In this research, the welding of stainless steel AISI 304 would be conducted as the primary metal material. AISI 304 stainless steel is a high alloy steel which contains 0.08% C, < 2.00%, Mn, < 1.00% Si, 18.00 to 20.00% Cr and 8.00 to 12.00% Ni. Stainless steel has different properties with carbon steel and low alloy steel with; this can greatly affect the nature of welding. This research aims to analyze the influence of variations in the welding current to metallographic test, hardness test and tensile test on welded joints of stainless steel AISI 304. Welding with GTAW welding with strong variations in the flow of 30A, 40A and 50A. The results of this study showed the highest Vickers hardness values are strong currents on the use of 40A (specimen II) that is equal to 226 kg/mm2, the maximum tensile strength occurs in the test specimen II (40A) of 698 N/mm2. This is because the microstructure of the HAZ in the test specimen II (40A) of austenite the least discovery of chromium carbide precipitation compared to the microstructure of the HAZ specimen I (30A) and III specimens (50A).

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Widya Eksakta

Jurnal Widya Eksakta diterbitkan secara berkala dua kali dalam setahun, Januari-Juni dan Juli-Des... see more