The impact toughness, tensile strength, and fatigue strength of welded joints in truck frames are discussed. Additionally, the molybdenum content in the truck frame weld is described. The results of tests conducted for two different electrode weld metals, performed using two methods characterized by different molybdenum content, are described. The results of strength tests are presented in the form of stress-strain diagrams. The results of fatigue tests are given 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 ferrite according to MIS) – were determined.TRUCKS FRAMES REPAIRES WITH BASIC ELECTRODES WITH MOLYBDENUM CONTENT
Strength and impact toughness of welded joins in car frames was discussed in the paper. The influence of the content of molybdenum in weld metal deposit on certain essential for the conditions of the exploitation of the truck frames properties (toughness) was described additionally. Results of conducted of two weld metal deposit investigations were described, executed two methods being characterizing the various content of molybdenum. The result of investigations were introduced in the form of graphs the tension-deformation. Metallographic structures studied weld metal deposit were analyzed and mark the proportional parts of the most beneficial under in relation to plasticity and endurance weld metal deposit of phase – the fine-grained ferrite (acicular ferrite according to. MIS). (…)
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Source: Logistyka Magazine
Repair of truck frames using basic electrodes with molybdenum addition – PDF file for download