A Study on the Overlay Welding Process Optimization of GTAW by Double Torch | Zendy

Byung-Chul Lim | Zendy; Young-San Son | Zendy

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A Study on the Overlay Welding Process Optimization of GTAW by Double Torch

Author(s) -

Byung-Chul Lim,

Young-San Son

Publication year - 2016

Publication title -

journal of the korea academia-industrial cooperation society

Language(s) - English

Resource type - Journals

eISSN - 2288-4688

pISSN - 1975-4701

DOI - 10.5762/kais.2016.17.3.73

Subject(s) - materials science , torch , welding , gas tungsten arc welding , metallurgy , overlay , taguchi methods , vickers hardness test , process (computing) , composite material , computer science , arc welding , microstructure , programming language , operating system

In this study, GTAW was carried out on austenitic STS316 stainless steel. Overlay welding with the stellite-base filler metal was implemented using a double torch. The response variable was calculated on the measured Vickers hardness for process optimization using the Taguchi method and its response variable was then analyzed about effect on overlay welding characteristics. The optimal process design by the Taguchi method is extremely effective in the overlay welding process for the multiple response variables. In addition, the effects of contribution rate about each response variable was analyzed easily. The conditions of the optimal process were 105A, 18V, pre-heat treatment at 200°C, and post weld heat treatment at 100°C. The Vickers hardness of the specimens produced under the optimal condition of GTAW by the double torch was 8.19% higher than that by a single torch.

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