- Study of fatigue behavior of AISI 1050 steel annealing with metal active gas process -
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Abstract
The propeller shaft of the fishing boat is made from AISI 1050 steel. It is often damaged by corrosion and breakage in use. Therefore, finding a suitable welding solution is the basis of this research objective. This study was carried out by studying the gas arc welding process with electric current at 130 Amperes and ER70S-6 welding wire with a welding speed of 250 millimeters per minute. The workpiece was pre-heated in an oven at 300 degrees Celsius for 30 minutes. After welding, the workpiece was annealed at 700, 800, and 900 degrees Celsius respectively. The results show that the suitable variables in this repair welding for fishing boat shaft was at 130 Amperes, welding speed at 250 millimeters per minute, and annealing temperature after welding at 900 degrees Celsius. It is also found that the heat from annealing after welding process results the average grain size at 22.43 micrometers and the grain size of heat-influenced welded area grew up as well around 254.41 micrometers respectively. Besides, it was found that the ferrite and pearlite phases were mixed together. Resulting in good toughness and strength properties. Moreover, it was found that 235,780 fatigue cycles were found to be pre-damaged.
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References
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