The fourth-generation rail (PG4) welding test of Panzhihua Iron and Steel Co., Ltd., which was carried out by the Ministry of Railways, the Institute of Metallurgical Research, the Panzhihua Iron and Steel Products Application Research Center and the Zhengzhou Railway Bureau, has entered the welding and track laying stage of the line. The railway Luoyang Works Section is under construction, and it is planned to complete the construction task of the first seamless line test section with the highest strength level in China within one month.
The seamless line is also called the long rail line. It is to weld a number of standard length rails to the long rails of 250m to 500m after being welded by the welding rail factory, and then transport them to the site for welding. Interval or super-interval seamless railway lines. Compared with ordinary lines, the seamless circuit eliminates the impact of the wheel on the rail head, which improves the speed and smoothness of the train operation, prolongs the service life of the line equipment and the rolling stock, and reduces the noise and line maintenance and repair. The workload is the necessary condition for high-speed and heavy-duty railways and the direction of modernization of the track structure.
According to industry experts, railway rails are organized from internal organizations, with traditional pearlite and bainite under development. Among the pearlite rails widely used at home and abroad, Panzhihua Steel's PG4 online heat treatment rail strength grade is 1300MPa, ranking first in the world. In order to give full play to the role of this high-strength rail in heavy-duty seamless lines and small-radius curve seamless lines, starting from August this year, Panzhihua and the railway department jointly launched a base flash welding test focusing on the welding performance of PG4 rails. And the long-steel prepared for online track laying is close to the actual situation of the aluminum heat welding test, which has achieved satisfactory results, laying a solid foundation for the final on-site welding test and paving test.
The seamless line is also called the long rail line. It is to weld a number of standard length rails to the long rails of 250m to 500m after being welded by the welding rail factory, and then transport them to the site for welding. Interval or super-interval seamless railway lines. Compared with ordinary lines, the seamless circuit eliminates the impact of the wheel on the rail head, which improves the speed and smoothness of the train operation, prolongs the service life of the line equipment and the rolling stock, and reduces the noise and line maintenance and repair. The workload is the necessary condition for high-speed and heavy-duty railways and the direction of modernization of the track structure.
According to industry experts, railway rails are organized from internal organizations, with traditional pearlite and bainite under development. Among the pearlite rails widely used at home and abroad, Panzhihua Steel's PG4 online heat treatment rail strength grade is 1300MPa, ranking first in the world. In order to give full play to the role of this high-strength rail in heavy-duty seamless lines and small-radius curve seamless lines, starting from August this year, Panzhihua and the railway department jointly launched a base flash welding test focusing on the welding performance of PG4 rails. And the long-steel prepared for online track laying is close to the actual situation of the aluminum heat welding test, which has achieved satisfactory results, laying a solid foundation for the final on-site welding test and paving test.
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