HIGH-IMPACT-TOUGHNESS STEEL RAIL AND PRODUCTION METHOD THEREOF
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United States of America Patent
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Jul 7, 2016
app pub date -
Jan 7, 2016
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Jan 7, 2016
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Abstract
The invention relates to a high-impact-toughness steel rail and a production method thereof, and belongs to the field of steel rail material production. The present invention is to provide a high-impact-toughness steel rail. The high-impact-toughness steel rail provided in the present invention is a pearlite steel rail with 0.05˜0.09 μm of inter-lamellar spacing and 30˜35 J of ballistic work at normal temperature; the chemical components of the steel rail in weight percentage are: C: 0.71-0.82 wt %, Si: 0.25-0.45 wt %, Mn: 0.75-1.05 wt %, V: 0.03-0.15 wt %, P: ≦0.030 wt %, S: ≦0.035 wt %, Al: ≦0.020 wt %, and Fe and inevitable impurities of the remaining content. The U-type impact toughness of rail head of the steel rail manufactured with the method disclosed in the present invention can be 30 J or more, and the tensile strength is about 1,300 MPa or higher.
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