Pearlite rail
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United States of America Patent
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Jan 29, 2013
Grant Date -
Sep 22, 2011
app pub date -
Aug 13, 2010
filing date -
Aug 18, 2009
priority date (Note) -
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Abstract
A pearlite rail contains, by mass %, 0.65 to 1.20% of C; 0.05 to 2.00% of Si; 0.05 to 2.00% of Mn; and the balance composed of Fe and inevitable impurities, wherein at least part of the head portion and at least part of the bottom portion has a pearlite structure, and the surface hardness of a portion of the pearlite structure is in a range of Hv320 to Hv500 and a maximum surface roughness of a portion of the pearlite structure is less than or equal to 180 μm.
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