Abstract
Weld gives rise to local heat effects with high temperatures which cause residual stresses on the weld area. To remove the residual stress, it is necessary to give a heat treatment through an annealing process. The purpose of this study is to determine the effect of the annealing process on the results of SMAW on the low carbon steel toughness. Type of the study conducted is experimental research. Weld uses SMAW of types. The object of the study is low carbon steel, Dimension 56 mm x 10 mm x 10 mm. The annealing process at a temperature variation of 6000 C, 6500 C, 7000 C with a holding time of 30 minutes heated in a furnace and cooled outdoor. The results of the impact test show that there is an increase in impact prices on low carbon steel welded after the annealing process. Low carbon steel raw material specimens have an average price of impact 1.58 x 106 N/m. Low carbon steel specimens without annealing process have an average price of the impact of 0.99 x 106 N/m. Low carbon steel specimens with 6000 C annealing temperature have an average price of impact 1.16 x 106 N/m. Low carbon steel specimens with an annealing temperature of 6500 C have an average price of the impact of 1.42 x 106 N/m. Low carbon steel specimens with an annealing temperature of 7000 C have an average price of impact 1.56 x 106 N/m. Based on Experiment it is obtained an illustration that the annealing temperature is 7000 C can restore the toughness level of the welded steel to resemble the toughness of raw material steel.
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