Abstract
In this study, a series of experiments involving Cr-Fe-C hardfacing alloys is conducted to evaluate the effect of oscillating traverse welding on microstructure and performance of clad alloys. The alloys are designed to exhibit hypoeutectic, eutectic, and hypereutectic morphology. The morphology of the heat-affected zone (HAZ) of the unmelted metal, the solidified remelted metal, and the fusion boundary exhibited distinct characteristics. In the hypoeutectic and the eutectic alloys, the same lamellar eutectic structure can be observed as the solidified structure, and they also showed the same evolution in the HAZ. In the hypereutectic alloy, the incomplete weld pool blending results in a eutectic morphology instead of a fully hypereutectic morphology. The hardness result reveals that, for the hypereutectic alloy, the eutectic region, instead of the HAZ, is the weak point. The wear test shows that the hypoeutectic alloy exhibits the same wear behaviors in both the remelted metal and the HAZ, and so is the hypereutectic alloy; the eutectic alloy remelted metal and the HAZ have different wear morphologies.
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The authors would like to acknowledge the financial support of the National Science Council under project NSC 102-2221-E-005-028-MY3.
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Manuscript submitted April 14, 2015.
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Lai, HH., Hsieh, CC., Wang, JS. et al. The Effect of Oscillating Traverse Welding on Performance of Cr-Fe-C Hardfacing Alloys. Metall Mater Trans A 46, 5171–5181 (2015). https://doi.org/10.1007/s11661-015-3093-z
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DOI: https://doi.org/10.1007/s11661-015-3093-z