• Title/Summary/Keyword: 조질고강력강

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Weldability of boron containing low carbon quenched and tempered 60kg/mm$^{2}$ steel with low cold cracking susceptibility (저탄소 B 첨가 60kg/mm$^{2}$급 저균열감수성 조질고강력강의 용접성)

  • 장웅성;김태웅;장래웅;엄기원
    • Journal of Welding and Joining
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    • v.7 no.1
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    • pp.59-66
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    • 1989

  • The weldability and joint performance were evaluated for newly developed 60kg/mm$\^$2/ steel which had low cold cracking susceptibility. The main results obtained were as follows; In case of quenched and tempered 60kg/mm$\^$2/ steels, it was very effective to improve weldability and joint performance by lowering carbon and Pcm level. Very small addition of about 0.001 to 0.002wt% boron exhibited an appreciable compensation effect on strength which was decreased by lowering carbon and Pcm level. As a result, the newly developed steel was able to be welded without preheating and exhibited superior joint performance to conventional steels.

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