Optimization of Electric Resistance Welding Conditions in Small Diameter X60 Pipes for HIC Resistance

H.U. Hong; Jong B. Lee

doi:10.4028/www.scientific.net/MSF.580-582.363

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Selection of the GTAW-Flux Process Parameters on Type 310 Stainless Steel via a Taguchi-Neural Approach
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Effect of Probe Thread on Friction Spot Joint Strength of AZ31 Mg Alloy
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Laser-Arc Hybrid Welding Process of Galvanized Steel Sheets
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Numerical Analysis of Arc Plasma with Metal Transfer in GMAW
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Optimization of Electric Resistance Welding Conditions in Small Diameter X60 Pipes for HIC Resistance
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Advanced Resistance Spot Welding Technologies: New Machine, Adaptive Control and FEM Simulation
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Friction Stir Lap Joining of AC4C Cast Aluminum Alloy and Zinc-Coated Steel
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An Evaluation Approach for Prediction of Process Parameters with Genetic Algorithm
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Monitoring of Backside Image of Molten Pool during Aluminum Pipe Welding Using Vision Sensor
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Optimization of Electric Resistance Welding Conditions in Small Diameter X60 Pipes for HIC Resistance

Abstract:

The optimization of electric resistance welding conditions has been investigated in order to improve the resistance to hydrogen induced cracking at bondline in API 5L X60 line pipes from center-slit coils. It was found that the elongated (Si, Mn, Al) rich oxide inclusions at bondline provided a preferential site for HIC, but no evidence on the center segregation effects was found. Design of experimental (DOE) method was used to find out the optimum ERW condition in the viewpoint of the minimization of defects ratio at bondline. The optimum ERW condition suggested by DOE successfully led to an excellent HIC resistance at bondline. Furthermore, it was observed that there was no relation between segregation and HIC resistance at bondline.