Development of GMAW Process with Twin Torch for Wide Overlay using Compound Filler Plate

Hwang, Kyu-Min; Kim, Sung-Deok; Jung, Byung-Ho; Cho, Sang-Myung

Journal of KWJS 2008;26(4):44-49.
Published online September 24, 2008.

분말 용가재판을 사용한 광폭 오버레이용 트윈토치 GMAW 공정개발

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Development of GMAW Process with Twin Torch for Wide Overlay using Compound Filler Plate

Kyu-Min Hwang, Sung-Deok Kim, Byung-Ho Jung, Sang-Myung Cho

Abstract

Generally, wear plate is steel plate having improved surface contact strength and impact strength by surface hardening which is welded using materials with good corrosion resistance, wear resistance and thermal resistance property. CFP GMAW(Compound Filler Plate Gas Metal Arc Welding) is the cladding method using GMAW with the CFP, which is bound with waterglass, on the substrate. It has advantages of reducing compound powder loss, uniform penetration, and preventing hardness decrease. To develope mass production technique of CFP GMAW process for production of high quality wear plate, the method for controling shallow penetration and increasing productivity is required. In this study, twin torch method applied to CFP GMAW process for increasing productivity. And the method was developed by controling penetration control, CFP dry time, gas formation flux and water glass concentration. As a result, applying twin torch method to CFP GMAW process was possible and high quality wide bead could be made without overlap joint.

Key Words: CFP(Compound Filler Plate), Overlay, Cladding, Twin torch GMAW, Penetration control, Wide bead