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The combined effect of boron addition and ausforming on the structure of low
carbon low alloyed steel after the transformation of austenite has been investigated in a wide
range of cooling rates. It is shown that boron hinders formation of polygonal ferrite in
continuous cooling regardless of austenite predeformation and suppresses appearance of
acicular ferrite. A qualitative explanation of this effect is proposed in terms of the deformation
induced boron segregation on boundaries of austenite grains and subgrains. Practical
significance of the obtained results is discussed in application to the thermomechanical
treatment of the considered steels.
Keywords: steel, austenite transformation, deformation, boron, microstructure |
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