发明名称 |
METHOD FOR HEAT-TREATING BAINITE STEEL RAIL |
摘要 |
A method for heat-treating a bainite steel rail is disclosed. The method includes: cooling a rolled steel rail naturally to lower a surface temperature of a rail head of the steel rail to 460° C.−490° C.; cooling the steel rail forcely at a cooling rate of 2.0° C./s-4.0° C./s to lower the surface temperature of the rail head to 250° C.-290° C.; placing the steel rail in an ambient temperature until the surface temperature of the rail head is more than 300° C.; performing a tempering on the steel rail in a heating furnace at 300° C.-350° C. for 2 h-6 h; and air cooling the steel rail to the ambient temperature. Steel rails heat-treated by present method may have a stable retained austenite structure and a good mechanical performance. |
申请公布号 |
US2014102603(A1) |
申请公布日期 |
2014.04.17 |
申请号 |
US201314055319 |
申请日期 |
2013.10.16 |
申请人 |
PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE CO., LTD. |
发明人 |
HAN ZHENYU;ZOU MING;JIA JIHAI;GUO HUA;LIU JIANHUA;DENG YONG;WANG CHUNJIAN;YUAN JUN;YAO HUI |
分类号 |
C21D9/04 |
主分类号 |
C21D9/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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