발간논문

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Vol.35, No.3, 374 ~ 381, 1997
Title
Research Paper - Surface Treatment : Evaluation of PTA Weld - Overlayers in Low Carbon Steel (Ⅰ) ( Evaluation of PTA Weld - Overlayers Using Taguchi Experimental Method )
김형준Hyung Jun Kim, 권영각Young Gak Kweon
Abstract
Taguchi matrix experiments with orthogonal arrays were conducted to evaluate the effects of PTA (Plasma Transferred Arc) process variables on the characteristics of weld-overlayers. The materials investigated were Ni-based Metco 16C and Co-based Stellite 6 powders. The characteristics of PTA weld-overlayers were assessed in terms of surface hardness, dilution, and maximum deposition thickness. Main results are that dilution is decreased as the main arc current is decreased and/or powder feeding rate is increased; surface hardness is increased as the main arc current is decreased; deposition thickness is increased as the powder feeding rate is increased and/or travel speed is decreased. Confirmation runs from the results of Taguchi matrix experiments showed good quality weld-overlayers, but did not exhibit the best quality weld-overlayers.
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