Study on service performance of 880 MPa and 980 MPa grade hot rolled rails for curve way
The service performances of two hot rolled rails of 880 MPa (U71Mn) and 980 MPa grades (U75V/U68CuCr) used for the railway with 500 m small radius curves were tracked.The macro morphology,light band width,face hardness and profile type were investigated.The results showed that the performance of 980 MPa grade rail was superior to 880 MPa grade rail at the same conditions.Therefore,980 MPa grade rail should be selected on the railway with short radius curves.
hot rolled railabrasionrailway with small radiusload test
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