Development of Continuous Galvanization-compatible Martensitic Steel

Y. F. Gong; De CoomanBruno C.; T. J. Song; Han S. Kim; J. H. Kwak

추천

검색

자료유형: 학술저널

저자정보: Y. F. Gong De CoomanBruno C. T. J. Song Han S. Kim J. H. Kwak

저널정보: 한국부식방식학회 Corrosion Science and Technology Corrosion Science and Technology 제11권 제1호

발행연도: 2012.1

수록면: 1 - 8 (8page)

이용수

📌

연구주제

📖

연구배경

🔬

연구방법

🏆

연구결과

초록· 키워드

오류제보하기

The development of martensitic grades which can be processed in continuous galvanizing lines requires the reduction of the oxides formed on the steel during the hot dip process. This reduction mechanism was investigated in detail by means of High Resolution Transmission Electron Microscopy (HR-TEM) of cross-sectional samples. Annealing of a martensitic steel in a 10% H2 + N2 atmosphere with the dew point of -35 ℃ resulted in the formation of a thin c-xMnO.SiO2 (x>1) oxide film and amorphous a-xMnO.SiO2oxide particles on the surface. During the hot dip galvanizing in Zn-0.13%Al, the thin c-xMnO.SiO2 (x>1)oxide film was reduced by the Al. The a-xMnO.SiO2 (x<0.9) and a-SiO2 oxides however remained embedded in the Zn coating close to the steel/coating interface. No Fe2Al5-xZnx inhibition layer formation was observed. During hot dip galvanizing in Zn-0.20%Al, the c-xMnO.SiO2 (x>1) oxide film was also reduced and the amorphous a-xMnO.SiO2 and a-SiO2 particles were embedded in the Fe2Al5-xZnx inhibition layer formed at the steel/coating interface during hot dipping. The results clearly show that Al in the liquid Zn bath can reduce the crystalline c-xMn.SiO2 (x>1) oxides but not the amorphous a-xMnO.SiO2 (x<0.9) and a-SiO2oxides. These oxides remain embedded in the Zn layer or in the inhibition layer, making it possible to apply a Zn or Zn-alloy coating on martensitic steel by hot dipping. The hot dipping process was also found to deteriorate the mechanical properties, independently of the Zn bath composition.

#martensitic steel #hot dip galvanizing #oxides #HR-TEM

참고문헌 (15)

참고문헌 신청

A. R. Marder / 2000 / / Progr. Mater. Sci 45 : 193 ~

C. Ramadeva Shastry / 2007 / / Proceedings of the 7th International Conference on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech) : 403 ~

D. Huin / 2005 / / Oxidation of Metals 64 : 132 ~

E. M. Bellouse / 2007 / / Mater. Sci. Eng. A 463 : 147 ~

J. Mahieu / 2001 / / Metall. Mater. Trans. A 32A : 2905 ~