The impact strength, tensile strength, and fatigue strength of welded joints in truck frames are discussed. Additionally, the oxygen content in the electrode weld metal in truck frames is described. The results of tests conducted for two different electrode weld metals, performed using two methods characterized by different oxygen content, are presented.The results of strength tests are presented in the form of stress-strain diagrams. The results of fatigue tests are provided in the form of Wöhler curves. The metallographic structures of the tested electrode weld metals were analyzed, and the percentage shares of the phase most favorable in terms of weld metal plasticity and strength – acicular ferrite (AF) – were determined. In 1999, a classification of welding processes based on oxygen content in the weld was proposed for the first time [1]. Low oxygen content in the weld metal (approx. 350 ppm) through the so-called (…)
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Source: Logistyka Magazine
Repair of truck frames using low-oxygen welding methods – PDF file for download