|
|
|
| Development of Long Steel Products for High-Speed Railway Track Plate |
| WANG Li-feng,ZHOU Yu-li,ZHANG Wei,ZHOU De,DENG Su-huai,DI Quan-kang |
| Shougang Research Institute of Technology, Beijing 100043, China |
|
|
|
|
Abstract The long steel product for high-speed railway track plate including steel grades and key technologies etc was introduced. Through reasonable optimization of Mn, Cr, B and Ti, the chemical composition of wire rod for CRTS1 plate was originally designed. The steel cleanliness such as total oxygen content at 7×10-6-12×10-6 can be improved without using ferrosilicon powder in refining process and increase the slag alkalinity. In order to solve the problem of decarburization sensitivity in median carbon and high silicon steel，the decarburized layer control technology including heating furnace temperature, heating time, atmosphere and cooling process after controlled rolling was developed. The decarburized depth can be controlled into a thickness less than 1% of steel diamater. The high strength on the basis of high plasticity was realized through using organization strengthening and precipitation strengthening, and simultaneously obtaining fine ferrite and pearlite in core of steel bar to ensure material plasticity.
|
|
Received: 03 September 2012
Published: 18 April 2013
|
|
|
|
|
|
|
2013, Vol. 48 
