• Title/Summary/Keyword: 조질고강력강

Search Result 1, Processing Time 0.015 seconds

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
    • /
    • v.7 no.1
    • /
    • pp.59-66
    • /
    • 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.

  • PDF