Tole d'acier plaquee trempee a chaud presentant une resistance elevee a la traction et son procede de fabrication

High tensile strength hot dip plated steel sheet and method for production thereof

Schmelztauchbeschichtetes stahlblech mit hoher zugfestigkeit und herstellungsverfahren hierfür

Abstract

As to a steel composition, in this invention, Si content is regulated to a given range and Nb and Cu or Ni, Mo are compositively added, and a recrystallization annealing is carried out to form an internal oxide layer just beneath a surface of a steel sheet and a surface oxide simultaneously formed on the surface of the steel sheet is removed by pickling. As a result, the formation of oxides of Si, Mn and the like is considerably decreased on the surface of the steel sheet in a subsequent heating before plating because the above internal oxide layer acts as a diffusion barrier. Thus, according to the invention, there can be obtained high tensile strength hot-dipped steel sheets having a considerably excellent plating property.

Claims

Description

Topics

Download Full PDF Version (Non-Commercial Use)

Patent Citations (2)

    Publication numberPublication dateAssigneeTitle
    CA-2330010-A1August 31, 2000Kawasaki Steel Corporation, Kazuaki Kyono, Shigeru Umino, Akio Tosaka, Keiji Nishimura, Hiromasa Hayashi, Jfe Steel CorporationPlaque d'acier, plaque d'acier obtenue par immersion a chaud et alliage de plaque d'acier obtenue par immersion a chaud et leurs procedes de production
    EP-1026274-A1August 09, 2000Nippon Steel CorporationHigh-strength steel plate reduced in softening in weld heat-affected zone

NO-Patent Citations (1)

    Title
    See also references of WO 0222893A1

Cited By (0)

    Publication numberPublication dateAssigneeTitle