WELDABILITY STUDY OF AISI 1035 STEEL BASED ON WIC CRACKING TEST METHOD (AWS B4) USING HYDRATED KOBE LB52 ELECTRODE

• Main Author: Yuwana, Arya
• Format: Theses
• Language: Indonesia
• Subjects: Teknik, prosedur, alat, perlengkapan, materi
• Online Access: https://digilib.itb.ac.id/gdl/view/37906
• Institution: Institut Teknologi Bandung

In tropical region such as Indonesia which have high relative humidity, high levels of water contained in the air can be vapour into the flux quickly. Fluxes of welding electrodes that have absorbed water can affect the welding process and increase the risk of defects in weld metals, especially hydrogen cracks. In this research, the weldability of AISI 1035 steel is studied to variations in water content absorbed by flux of low hydrogen electrode Kobe LB 52 (AWS 7016) in a conditioned environment, based on the Welding Institute of Canada (WIC) cracking test method. The sample is welded with and without preheat conditioning on the parent metal. After the test sample was welded using the SMAW welding process, the observation was carried out on the third day after welding, and non-destructive testing was carried out using the dye penetrant method. The 65% hydrogen crack occurs in the sample which is not preheated on the parent metal and at the electrode flux which absorbs 7% water vapor. In preheat conditioned samples at a temperature was 150°C with flux conditions absorbing water up to 1.4% 1.8%, and 7% no cracks found, then preheat can prevent or reduce the risk of defects in welds. As one analysis, preheat at a temperature 150°C and absorbed water content of up to 7% can be recommended for low hydrogen electrodes Kobe LB 52.