Successive phase and morphology evolution of galvannealed coating in hot stamping and diffusion modeling of α-Fe(Zn)/steel system considering the effect of Zn concentration

Wang, Kai; Zhu, Bin; Wang, Zijian; Liu, Yong; Wang, Liang; Zhang, Yisheng; Li, Shiqi

doi:10.1016/j.surfcoat.2019.125036

Cited by 14 publications

(13 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our previous study on phase evolution of ZnFe coating under furnace heating procedure, a total heating time of 300 s (holding for 190 s) was required for the coating to achieve sufficient alloying and transform into the one-layer structure composed of α-Fe(Zn) phase [7]. As a contrast, the total heating time required for the coating to achieve sufficient alloying was 98.85 s (holding for 90 s) at the heating rate of 100 °C/s, which was significantly shortened.…”

Section: Resultsmentioning

confidence: 99%

The Influence of Heating Rate on Phase Transformation of ZnFe Coating in Hot Stamping

Wang¹,

Fang²,

Zhu³

et al. 2023

Atlantis Highlights in Materials Science and Technology

View full text Add to dashboard Cite

In this study, the ZnFe coated boron steel specimens were treated by rapid heating at different heating rates from 20 °C/s to 100 °C/s. The coating morphologies and phase compositions were characterized to investigate the influence of heating rate on phase transformation of ZnFe coating. The results indicated that there was no continuous α-Fe(Zn) layer formed at coating/substrate interface during the heating-up stage when the heating rate was higher than 50 °C/s. As a result, the phase transformation of the coating was facilitated. At the heating rate of 100 °C/s, a one-layer coating structure composed of α-Fe(Zn) phase was formed within 100 s, which is significantly shortened compared to the traditional furnace heating method.

show abstract

Section: Resultsmentioning

confidence: 99%

The Influence of Heating Rate on Phase Transformation of ZnFe Coating in Hot Stamping

Wang¹,

Fang²,

Zhu³

et al. 2023

Atlantis Highlights in Materials Science and Technology

View full text Add to dashboard Cite

show abstract

“…One can identify mostly non-metallic elements beginning with a prominent H peak. The next notable spectral peaks are related to 12 C and slightly stronger CH, followed by almost equal 16 O and OH peaks. A rather strong 19 F peak is similarly distinctive as in Fig.…”

Section: Cross Section Analysis With Him-tof-simsmentioning

confidence: 95%

“…Chen et al [11] focused on the effects of surface oxides on the steel strip before galvanization and compared standard Zn coatings on dual phase steels with ZnFe galvannealed coatings. Wang et al [12] described the diffusion process for the ZnFe phase depending on the Zn concentration in GA coated 22MnB5. Autengruber et al [13] extended their previous work on Zn coated PHS and gave a brief overview of the post annealed coating surface.…”

Section: Introductionmentioning

confidence: 99%

Effects of alloying elements on surface oxides of hot–dip galvanized press hardened steel

Gaderbauer

Arndt

Truglas

et al. 2020

Surface and Coatings Technology

View full text Add to dashboard Cite

“…The hot stamping state of the galvanized sheet has a strong sensitivity to the process parameters, and the traditional hot stamping process of the uncoated sheet cannot be fully applied to the hot stamping of the galvanized sheet. The cause of premature cracking of the matrix is Liquid metal induced embrittlement (LMIE) [3]. That is, when the liquid metal is in contact with another flexible metal, it will induce cracks in the flexible metal, and the cracks will be accompanied by stress expansion, which will eventually lead to premature cracking of the flexible metal.…”

Section: Hot Stamping Process Of Galvanized Steel Sheetmentioning

confidence: 99%

Research and Application of Hot Stamping Process for High Strength Steel Zinc-Based Coated Sheet

Wang¹,

Zhang²,

Zhu³

et al. 2023

Atlantis Highlights in Materials Science and Technology

View full text Add to dashboard Cite

High-strength steel hot-formed parts are widely used as safety protection parts for automobiles due to their ultra-high strength (1500( -2000. In order to prevent the oxidation and decarburization of traditional high-strength steel sheets during the heating process of hot forming, and at the same time enhance the corrosion resistance of hot-formed parts, galvanized high-strength steel sheets have been applied. The hot forming process of galvanized high-strength steel plate is studied, the mechanism of LMIE crack generation is analyzed, and the hot-forming process route suitable for galvanized high-strength steel plate is formulated. The key process parameters in the hot stamping process of zinc-based plated sheets, namely heating temperature, holding time, effective range and effect of forming temperature, are studied. Short-term heating, pre-cooling forming, shortening the holding time of the sheet, and then reducing the temperature of the sheet to a certain extent by a specific method before forming, the results show that when the forming temperature is low (700 °C), the matrix basically has no cracks. The reduction of the forming temperature is beneficial to the elimination of liquid zinc in the coating, thereby preventing the occurrence of LMIE phenomenon. In addition, when the forming temperature is low, the matrix phase transition temperature range becomes narrow, and the rate of forming cooling is required to be higher. The new generation of zinc-based coated sheets can improve the low temperature hardenability, which is beneficial to the pre-cooling low temperature forming process, which can be regarded as the future direction.

show abstract

Successive phase and morphology evolution of galvannealed coating in hot stamping and diffusion modeling of α-Fe(Zn)/steel system considering the effect of Zn concentration

Cited by 14 publications

References 35 publications

The Influence of Heating Rate on Phase Transformation of ZnFe Coating in Hot Stamping

The Influence of Heating Rate on Phase Transformation of ZnFe Coating in Hot Stamping

Effects of alloying elements on surface oxides of hot–dip galvanized press hardened steel

Research and Application of Hot Stamping Process for High Strength Steel Zinc-Based Coated Sheet

Contact Info

Product

Resources

About