ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
For industrial purposes, the adhesion control of secondary scale on hot rolled steel sheetis important. A basic study was carried out to clarify the effect of scale microstructure on the scaleadhesion of low carbon steel (0.03%C-0.2%Mn). When scale of FeO (about 8μm thickness) wasgenerated at 800°C and transformed by continuous cooling from 250~600°C to 200°C, the scaletransformed from 400°C showed good adhesion. The scale consisted of magnetite seam from thesteel substrate, lamellar structure of magnetite and α-Fe, and magnetite layer from the scale surface.The orientation analysis by TEM showed the relationship {110}Fe // {100}Fe3O4, 〈110〉Fe //〈100〉Fe3O4, and the lattice strain was calculated as 4%. On the other hand, FeO/Fe substrateshowed the relationship {100}Fe // {110}FeO, 〈110〉Fe // 〈110〉FeO, and 25% lattice strain wascalculated. It is considered that the adhesion of scale should be affected by the lattice strain, thusFe3O4/Fe substrate showed better adhesion than FeO/Fe substrate. The temperature of FeOformation also affects the scale adhesion through the extent of Fe super saturation in FeO
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.522-523.409.pdf
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