High tensile strength hot dip plated steel sheet and method for production thereof,申请号AU20010084507-传众专利搜索

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

申请公布号：AU8450701(A)

申请号：AU20010084507

申请日期：2001.09.10

申请公布日期：2002.03.26

申请人：

KAWASAKI STEEL CORPORATION

发明人：KAZUHIDE ISHII;KAZUAKI KYONO;CHIAKI KATO;KAZUO MOCHIZUKI

分类号：C21D8/02;C22C38/04;C22C38/12;C23C2/02

主分类号：C21D8/02

摘要：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.