王晓丽, 宋波, 焦国利. Influence of Rolling Deformation on Interlamellar Spacing of Pearlite in U75V Heavy Rail Steel[J]. Special Steel, 2008, 29(6): 52-54.DOI:
The cast bloom size for U75V heavy rail steel is 280 mm×380 mm
and the heavy rail products are produced with 14 passes rough rolling(BD1)- medium rolling(BD2)and CCS 6 passes finishing rolling(UR
1
ER
UR
2
UR
3
EF
UF).The interlamellar spacing of pearlite in heavy rail steel at different pass was measured by scanning electron microscope. Measured results showed that with increasing deformation(reduction ratio of sectional area)of BDIE
BD2B
UR and UF pass of heavy steel
the interlamellar spacing of pearlite in heavy rail section of head
web
track bottom and leg decreased respectively to 0.293 μm
0.269 μm
0.253 μm and 0.229 μm from original0.512 μm
0.414 μm
0.493 μm and 0.452 μm as a result to obviously increase mechanical properties of heavy rail.