Research on Fine Characterization of Microstructure Difference of High Carbon Galvanized Steel Wire

doi:10.12068/j.issn.1005-3026.2022.04.007

Abstract

Abstract: The fine microstructure in high carbon galvanized steel wires from different manufacturers at domestic and abroad were experimentally characterized and compared. The results show that the microstructure of the domestic steel wires has apparently difference with that of the imported ones， in terms of the distribution of inclusion sizes， the thickness of galvanized layer， the spacing of sorbite lamella， cementite morphology， dislocation density， and etc. For instance， the percentage of the inclusions with the equivalent diameter less than 5 μm can be up to 90.6% in the imported wire， compared with 85.4% and 88.0% in the domestic ones. The Zn-Fe alloy layer in the galvanized layer of the domestic wire is thicker and the coated layer is more loose. Moreover， the sorbite lamellar spacing of the domestic wire is larger and the distribution is more dispersed. It is also found that in the domestic wire， the dissolution of cementite is more serious， the number of granular and short-rod cementite particles increase significantly， and the dislocation density is 10 times than that of the imported one. The microstructural differences above lead to the poor performance and unstable quality of the domestic steel wire.

Key words: high carbon steel wire; inclusions; microstructure; sorbite; galvanized layer; dislocation density

CLC Number:

TG335.58

ZHI Wei-jun ， YAO Zan， JIANG Zhou-hua. Research on Fine Characterization of Microstructure Difference of High Carbon Galvanized Steel Wire[J]. Journal of Northeastern University(Natural Science), 2022, 43(4): 501-508.

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