Analysis of coolant and heat treatment effects on X52M PSL 2 welding on the microstructure, hardness, and toughness properties
Keywords:
hardness vickers, impact charpy, metalografi, SAW, spiral pipe, X52Abstract
In the manufacture of Pipes with API (American Petroleum Institute) 5 L specifications using X52 material with the SAW (Submerged Arc Welding) welding method, the toughness value of the material after welding has not been met. So there needs to be a solution to achieve the toughness value on WM. Soin this study the author conducted an experiment on the impact of variations in air, water and SAE 40 oil cooling media and the provision of tempering on the X52 welding results which were reviewed from the results of hardness, toughness and microstructure values. So that it can determine the variation of cooling media and the provision of tempering that has the best welding results. The test results showed the highest hardness on WM of 228.3 HV with air cooling, while the lowest was 198.6 HV in oil media with tempering. Conversely, the highest toughness was achieved in oil media with tempering of 172.6 Joules, and the lowest in air media without tempering of 134 Joules. Microstructural analysis in the WM area shows a decrease in the pearlite phase, namely 63% (air), 62% (water + tempering), and 52% (oil + tempering).
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