Heat treatment method for bainitic turnout rail

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United States of America Patent

PATENT NO 9394581
APP PUB NO 20140060710A1
SERIAL NO

13974744

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Abstract

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The present disclosure discloses a heat treatment method for a bainitic turnout rail, which includes: naturally cooling the turnout rail at a temperature in an austenite region after being finishing rolled to 450-480° C. at a tread center of a rail head of the turnout rail; accelerated cooling the naturally cooled turnout rail to 230-270° C. at the tread center of the rail head, a cooling rate at the tread center and a non-working side of the rail head being 1.5-5.0° C./s, a cooling rate at the working side of the rail head increasing by 0.1-1.0° C./s based on 1.5-5.0° C./s; continuously accelerated cooling the working side, the tread center and the non-working side of the rail head at a cooling rate of 0.05-0.25° C./s to decrease a temperature of the tread center of the rail head to 265-270° C.; and finally, naturally cooling the turnout rail to an ambient temperature.

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Patent Owner(s)

Patent OwnerAddress
PANGANG GROUP PANZHIHUA IRON & STEEL RESEARCH INSTITUTE CO LTD617000 TAOYUAN STREET EAST DISTRICT PANZHIHUA SICHUAN PROVINCE NO 90 PANZHIHUA CITY SICHUAN PROVINCE 617000

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Deng, Yong Panzhihua, CN 59 200
Guo, Hua Panzhihua, CN 126 998
Han, Zhenyu Panzhihua, CN 22 30
Jia, Jihai Panzhihua, CN 7 14
Liu, Jianhua Panzhihua, CN 396 679
Wang, Chunjian Panzhihua, CN 12 15
Wang, Yanzhong Panzhihua, CN 5 5
Zou, Ming Panzhihua, CN 28 383

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