Acta Metallurgica Sinica (English Letters) ›› 1990, Vol. 3 ›› Issue (4): 287-292.

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THERMAL CRACK AND WEAR OF RAIL WHEEL AND DEVELOPMENT OF THERMAL CRACKING PROOF WHEELS

DONG Renze China Academy of Railway Sciences,Beijing,China Associate Professor,Dept.of Science and Technology Development,China Academy of Railway Sciences,Beiiing 100081,China   

  • 收稿日期:1990-08-25 修回日期:1990-08-25 出版日期:1990-08-25 发布日期:2009-10-10

THERMAL CRACK AND WEAR OF RAIL WHEEL AND DEVELOPMENT OF THERMAL CRACKING PROOF WHEELS

DONG Renze China Academy of Railway Sciences,Beijing,China Associate Professor,Dept.of Science and Technology Development,China Academy of Railway Sciences,Beiiing 100081,China   

  • Received:1990-08-25 Revised:1990-08-25 Online:1990-08-25 Published:2009-10-10

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摘要： <正> The thermal cracking and wear mechanism of rail wheel tread have been studied.The resultsshowed that the thermal cracking of rail wheel tread is related to the chemical composition(mainly the carbon content)and the hardness of the wheels.When the composite brakingshoes are used,the rate of wear of the wheel tread is related to the fracture toughness of thenewly-formed“white layer”i.e.the martensite.The thermal cracking proof wheels(55SiMn)so far developed has achieved significant operating results in practical use.

Abstract: The thermal cracking and wear mechanism of rail wheel tread have been studied.The results showed that the thermal cracking of rail wheel tread is related to the chemical composition (mainly the carbon content)and the hardness of the wheels.When the composite braking shoes are used,the rate of wear of the wheel tread is related to the fracture toughness of the newly-formed“white layer”i.e.the martensite.The thermal cracking proof wheels(55SiMn) so far developed has achieved significant operating results in practical use.

Key words: thermal cracking, wear, fracture toughness, composite braking shoe