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Study of strip-shaped chromatic aberration defects on the surface of an electro-galvanized fingerprint-resistant sheet

引用

Baosteel Technical Research 2023年第2期17卷 7-14页

作者： HE Yutian HUANG Shengbiao ZHANG Baoping Research Institute Baoshan Iron&Steel Co.Ltd.Shanghai 201999China Cold Rolling Mill Baoshan Iron&Steel Co.Ltd.Shanghai 201900China

Strip-shaped chromatic aberration defects on the surface of an electro-galvanized fingerprint-resistant sheet were systematically studied using Thermo-Calc thermodynamic calculations,scanning electron microscope and X-ray diffractometer analyses,and rapid heat treatment simulation *** formation mechanism of these defects was also *** results show a strong correlation between the defects and the uneven distribution of the Fe(001)component on the surface of the steel *** relatively high proportion of Fe(001)components on the surface of the steel substrate affects the distribution density of the Zn crystal cells in different orientations during the electrodeposition process,which causes the reflection intensity of the light of the galvanized layer to differ from various visual perspectives,and macroscopic strip-shaped chromatic aberration defects are finally *** high proportion of the Fe(001)component on the surface of the steel substrate is mainly related to the following two ***,when the strip steel is hot-rolled,the finishing hot-rolling temperature is close to theγ→αphase transition *** the local temperature on the upper surface of the strip steel is low,γ+αtwo-phase rolling easily occurs,and this results in an uneven stress distribution between theγandαphases after the hot-rolling *** uneven distribution of hot-rolling stress results in the formation of a coarse grain structure in the local area on the surface of the hot-rolled sheet,which strongly affects the subsequent cold rolling and annealing process,and the annealed steel sheet substrate ultimately contains a greater proportion of the Fe(001)*** second,a fast cooling rate(>10 K/s)during the slow cooling stage in the continuous annealing process inhibits the transformation of the Fe(001)to the Fe(111)component on the surface of the cold-rolled steel sheet,and it is then not possible to effectively eliminate the influence of the une

关键词： electro-galvanized fingerprint-resistant sheet strip-shaped chromatic aberration defects texture

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