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Journal of welding and joining = 대한용접·접합학회지, v.35 no.3, 2017년, pp.68 - 74
신태우 (한국기술교육대학교 신소재공학과) , 현준혁 (한국기술교육대학교 신소재공학과) , 고진현 (한국기술교육대학교 신소재공학과)
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Characteristics of dissimilar metal welds between alloy steel ASTM A387 Gr. 91 and carbon steel ASTM A516 Gr.70 made with Flux cored arc welding(FCAW) have been evaluated in terms of microstructure, mechanical strength, chemical analysis by EDS as well as corrosion test. Three heat inputs of 15.0, 2...
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| 핵심어 | 질문 | 논문에서 추출한 답변 |
|---|---|---|
| SA516 Gr.70의 단점은? | 또한 이 강은 내수소균열 압력용기(HIC resistant pressure vessel)용으로도 사용되고 있다. 하지만 용접부의 탄소당량이 높아 용접 시 균열이 발생될 수 있어 용접성을 보증하기 어렵다는 단점이 있다2). | |
| SA387 Gr.91은 어떤 원소를 첨가하여 만들었는가? | SA387 Gr.91은 9%Cr-1%Mo 강에 미량의 Nb, V, N등이 첨가되어 고온에서 우수한 강도를 가져 600℃ 까지 도달하는 스팀 제너레이터에 많이 사용되고 있다3-7) . 최근 이 강재는 한랭지역으로 사용환경 확대 및 후물화로 인해 -30℃ 저온인성에 대한 안전성이 필요하며, 용접부 물성 확보를 위한 장시간 용접후열처리(Post-Weld Heat Treatment, PWHT)가 요구되고 있다8) . | |
| 탄소강용 와이어을 이용하여 합금강 ASTM A387 Gr. 91과 탄소강 ASTM A516 Gr. 7을 용접 한 경우 용접부에서 어떤 조직이 발견되는가? | 1) 용접부에서의 미세조직은 입내와 입계 페라이트, 비드만스테텐 페라이트, 아시큘러 페라이트가 생성되었다. |
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Ho-Chun Yoo, Effect of Cr, Nb and Ti on the properties in HAZ of A516-70 steels with low HIC-susceptibility, Proceedings of KWJS, 1 (1998), 138-139 (in Korean)
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Ghang-Soo Kim, Dae-Soon Kim, A study on the charpy impact property of the FCAW welds for low temperature service, Proceedings of KWJS, 39 (2002), 85 (in Korean)
Jin-Hyun Koh, Jung-Han Kook, A study on the effect of heat input on the microstructure and toughness of weldments made by domestic flux cored wires, Journal of KWS, 11(4) (1993), 57-69 (in Korean)
In-June Moon, Bok-Su Jang, Se-Cheol Kim, Jin Hyun Koh, A study characteristics of dissimilar welds between super duplex stainless steel INS S32750 and Carbon steel A516-70 with FCAW, J. of Welding and Joining, 32(4) (2014), 26-33 (in Korean)
KWJS, Welding & Joining Handbookm,ferrous & nonferrous metals II, KWJS, (2008), 289 (in Korean)
Sami I. Al-rubaiey, Eman A. Anoon, Mahdi M. Hanoon, The influence of microstructure on the corrosion rate of carbon steels, Journal of Eng & Tech, 31(10) (2013), 1825-1836
KWJS, Welding & Joining Handbook, ferrous & nonferrous metals Ι , KWJS, (2008), 118 (in Korean)
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