• Title/Summary/Keyword: Welding Consumables

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Explosion Bulge Test Underwater of 800MPa Grade Pre-heat Free Welding Plate (800MPa급 무예열 용접 판재의 수중 폭파변형시험)

  • Park, Tae-Won;Song, Young-Beum;Kim, Jin-Young;Yang, Sung-Ho;Park, Chul-Gyu;Seo, Jun-Suck;Kim, Hee-Jin
    • Journal of Welding and Joining
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    • v.28 no.6
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    • pp.63-69
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    • 2010

  • The pre-heat free consumables for GMAW, SAW and FCAW processes that matche with the Cu-bearing PFS-700 steel which has yield strength over 700MPa were developed and evaluated to see the suitability in military such as submarine and battle ship. Explosion Bulge Test underwater was developed and applied to see the reliability of welded structure. All welding was conducted without pre-heat before welding, the interpass temperature was below $150^{\circ}C$ for all welding conditions. Tensile strength for the weld metal in GMAW, SAW and FCAW process is 887MPa, 875MPa and 813MPa, respectively, these values are similar to the base metal of PFS-700 steel of 838MPa. EBT results in GMAW, SAW and FCAW show 14.0%, 14.02% and 15.9% reduction of thickness without generation of crack, respectively and stand-off distance was set up properly to have over 14.0% reduction of thickness. Through EBT results, the developed new consumables are applicable to the weapon systems such as submarine and battle ship.

  • https://doi.org/10.5781/KWJS.2010.28.6.063 인용 PDF KSCI

State of Art Report on the Trends of Welding Consumable Development for Higher Strength Steels

  • Kim, H. J.
    • International Journal of Korean Welding Society
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    • v.2 no.1
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    • pp.52-56
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    • 2002

  • This report was prepared to give informations on a proper way to develop new consumables for the steels with improved weldability. Traditionally, hydrogen control has been pursued mainly for suppressing the HICC in HAZ but it also has contributed to HICC in weld metal. Facing the limitations in reducing the hydrogen content, it is now important to consider the microstructural control approach in order to improve the HICC resistance of weld metal . It has been shown that changes in alloy design, and hence composition and microstructure, was quite effective in producing high strength weld metal with improved resistance to cold cracking. Besides the economic test methods for evaluating susceptibility of multipass weld metal is essential to promote the development of welding consumables.

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Explosion Bulge Test in Underwater of 800MPa Grade Pre-Heat Free Welding Plate (800MPa급 무예열 용접 판재의 수중 폭파변형시험)

  • Park, Tae-Won;Song, Young-Bum;Kim, Jin-Young;Yang, Seong-Ho;Hong, Sung-Suk;Shim, In-Ok;Park, Chul-Kyu;Kim, Hee-Jin
    • Proceedings of the KWS Conference
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    • 2010.05a
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    • pp.63-63
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    • 2010

  • The pre-heat free consumables for GMAW, SAW and FCAW processes that matches the Cu-bearing PFS-700 steel which has yield strength over 700MPa were developed and evaluated to see the suitability in military such as submarine and battle ship. Explosion bulge test in underwater was developed and applied to see the reliability of welded structure. All welding was conducted without pre-heat before welding, the interpass temperature was below $150^{\circ}C$ for all welding conditions. Tensile strength for the weld metal in GMAW, SAW and FCAW process is 887MPa, 875MPa and 813MPa, respectively, these values are similar to the base metal of PFS-700 steel of 838MPa. EBT results in GMAW, SAW and FCAW show 14.0%, 14.02% and 15.9% reduction of thickness without generation of crack, respectively and stand-off distance was set up properly to have over 14.0% reduction of thickness. Through EBT results, the developed new consumables are applicable to the weapon systems such as submarine and battle ship.

  • PDF