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- W1990068542 abstract "본 연구에서는 아연도금강관 용접에 용접 전류, 전압과 보호가스가 용접 비드 형상과 미세조직과 경도에 미치는 영향을 조사하였다. 전압, 전류과 보호가스 종류 및 조성의 변화가 용접 비드의 높이와 너비, 용입깊이에 영향을 미침을 확인하였다. 비드높이에는 보호가스 Ar 가스, 용입에는 <TEX>$CO_2$</TEX> 가스, 그리고 비드너비에는 Ar+<TEX>$O_2$</TEX> 가스가 가장 큰 영향을 미쳤다. 용접부의 경도에서는 Ar+10% <TEX>$O_2$</TEX> 와 Ar+20% <TEX>$CO_2$</TEX> 가스 사용 시 결정립계 페라이트와 다각형 페라이트가 생성되어 낮았으며, Ar+2% <TEX>$O_2$</TEX> 가스를 사용했을 때는 아시큘러 페라이트와 베이나이트적 페라이트와 사이드플레이트 페라이트가 생성되어 경도가 높았다. The present study was carried out to investigate the effects of welding parameters such as current, voltage and shielding gases on the bead shape, microstructures and hardness. It was confirmed that bead height was lowered and bead depth was increased with increasing voltages while height, depth and width of beads increased with welding currents. The hardness of weld metals with Ar+10% <TEX>$O_2$</TEX> and Ar+20% <TEX>$CO_2$</TEX> was low due to the formation of grain boundary and polygonal ferrites while that of weld metals with Ar+2% <TEX>$O_2$</TEX> was high due to the presence of acicular, bainitic and sideplate ferrites." @default.
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- W1990068542 date "2013-02-28" @default.
- W1990068542 modified "2023-10-18" @default.
- W1990068542 title "Effect of Welding Parameters on Bead Shape, Microstructure and Hardness of Galvanized Steel Pipe Welds with GMAW" @default.
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- W1990068542 doi "https://doi.org/10.5762/kais.2013.14.2.535" @default.
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