Super high HAZ toughness technology with fine microstructure imparted by fine particles

Akihiko Kojima, Akihito Kiyose, Ryuji Uemori, Masanori Minagawa, Manabu Hoshino, Takao Nakashima, Koji Ishida, Hirotsugu Yasui

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

In order to produce high HAZ toughness steel plates with tensile strength of 490MPa to 590MPa class, the innovative technology for HAZ microstructure refinement, HTUFF®, has been developed. Fine dispersion of oxides and/or sulfides in steel has been tried to retard y grain growth in the HAZ near a weld fusion line. It has been discovered that very small oxides and/or sulfides with sizes of several 10nm to several 100nm can be dispersed in steel by the appropriate addition of Mg and/or Ca into steel. Utilizing these fine particles containing Mg or Ca, the strong pinning technology to retard y grain growth in a HAZ has been commercially established. Based on the concept of HTUFF providing excellent HAZ toughness, high-performance structural steel plates have been mass-produced.

Original languageEnglish
Pages (from-to)2-6
Number of pages5
JournalNippon Steel Technical Report
Issue number90
Publication statusPublished - Jun 1 2004

Fingerprint

Steel
Toughness
Microstructure
Sulfides
Grain growth
Oxides
Heat affected zone
Welds
Tensile strength
Fusion reactions

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Kojima, A., Kiyose, A., Uemori, R., Minagawa, M., Hoshino, M., Nakashima, T., ... Yasui, H. (2004). Super high HAZ toughness technology with fine microstructure imparted by fine particles. Nippon Steel Technical Report, (90), 2-6.

Super high HAZ toughness technology with fine microstructure imparted by fine particles. / Kojima, Akihiko; Kiyose, Akihito; Uemori, Ryuji; Minagawa, Masanori; Hoshino, Manabu; Nakashima, Takao; Ishida, Koji; Yasui, Hirotsugu.

In: Nippon Steel Technical Report, No. 90, 01.06.2004, p. 2-6.

Research output: Contribution to journalArticle

Kojima, A, Kiyose, A, Uemori, R, Minagawa, M, Hoshino, M, Nakashima, T, Ishida, K & Yasui, H 2004, 'Super high HAZ toughness technology with fine microstructure imparted by fine particles', Nippon Steel Technical Report, no. 90, pp. 2-6.
Kojima A, Kiyose A, Uemori R, Minagawa M, Hoshino M, Nakashima T et al. Super high HAZ toughness technology with fine microstructure imparted by fine particles. Nippon Steel Technical Report. 2004 Jun 1;(90):2-6.
Kojima, Akihiko ; Kiyose, Akihito ; Uemori, Ryuji ; Minagawa, Masanori ; Hoshino, Manabu ; Nakashima, Takao ; Ishida, Koji ; Yasui, Hirotsugu. / Super high HAZ toughness technology with fine microstructure imparted by fine particles. In: Nippon Steel Technical Report. 2004 ; No. 90. pp. 2-6.
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