Abstract
Bright layers covering 80 percent of the melt area have been achieved by laser glazing on Fe-C-Si-B eutectic matrix prealloyed by laser on nodular iron substrates, which are verified to be metallic glasses by TEM electron diffraction. It is demonstrated in the paper that epitaxial growth from the crystalline substrate in melt bottom is the universal phenomenon and critical factor during laser glazing. The principal condition for glass forming is the abrupt stop of the epitaxial growth during solidification, which is comprehensively dependent upon the eutectic composition, composition homogeneity, microstructure fineness, laser glazing power density and scanning velocity.
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