Metallurgy, Vol. 65 No. 2, 2026.
Original scientific paper
https://doi.org/10.64486/m.65.2.9
Influence of Hot-Dip Galvanizing Cooling Process on Properties of 1000 MPa Multiphase Steel
J.P. Wang
; Liaoning Provincial Engineering Research Center for High-Value Utilization of Magnesite, Yingkou Institute of Technology, Yingkou 115014, China
*
Y.J. Fu
; Benxi Steel Technology Center, Iron and Steel Research Institute of Ansteel Group, Benxi, Chi-na
Y. Chen
; Benxi Steel Technology Center, Iron and Steel Research Institute of Ansteel Group, Benxi, Chi-na
H.L. Liu
; Benxi Steel Technology Center, Iron and Steel Research Institute of Ansteel Group, Benxi, Chi-na
L.W. Zhang
; Liaoning Provincial Engineering Research Center for High-Value Utilization of Magnesite, Yingkou Institute of Technology, Yingkou 115014, China
*
J.L. Bai
; Liaoning Provincial Engineering Research Center for High-Value Utilization of Magnesite, Yingkou Institute of Technology, Yingkou 115014, China
* Corresponding author.
Abstract
For 1000 MPa multiphase steel CP980+Z, simulation experiments were carried out under different slow-cooling and rapid-cooling temperatures, and the resulting me-chanical properties and microstructures were evaluated. The findings show that this work fills a gap in previous research on CP980+Z. Unlike earlier studies that focused on austenitization temperature or cold rolling reduction, this study systematically reveals the synergistic regulation mechanism of slow cooling in the intercritical re-gion and rapid cooling on the material’s overall performance. When the slow-cooling temperature ranges from 740 °C to 760 °C, the yield ratio meets the re-quired standards. When the final rapid-cooling outlet temperature is 350 °C, the strength–ductility balance and hole expansion capability reach optimal values. The underlying microstructural mechanism is governed by controlling ferrite nucleation and growth during slow cooling, and bainite–martensite transformation during rapid cooling. This combined control determines the content and distribution of martensite and martensite/austenite (M/A) islands.
Keywords
slow cooling temperature; rapid cooling temperature; galvanized multiphase steel; bainite
Hrčak ID:
343673
URI
Publication date:
1.4.2026.
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