Railway Steel Rail Railway track

Rail editing

The rail is the main component of the railway track. Its function is to guide the wheels of the locomotive forward, bear the enormous pressure of the wheel, and passed to the sleeper. The rails must provide a continuous, smooth and resistant rolling surface for the wheels. In the electrified railway or automatic block section, the rail can also be used as a track circuit.

domestic

China's rail to the approximate weight per meter kilogram, can be divided into crane rail (crane rail), heavy rail and light rail three:

? crane rail is divided into QU120, QU100, QU80, QU70 four, the material is generally manganese steel, single largest is QU120 up to 118kg / m.

? heavy rail. According to the steel used in steel is divided into: ordinary manganese-containing rail, copper-carbon steel rail, high-silicon steel-bearing steel rail, copper rail, manganese rail, There are three main 38,43,50 kg. There are also 45kg rails for a few lines that have been planned for 60kg rails on lines with high traffic and high speed. GB2585- 81 provides the technical conditions of 38 ~ 50kg / m rail in China, its size and code, etc. as shown in Table 6-7-10.

In 2007, China issued a new standard GB 2585-2007, in addition to 38 ~ 50kg / m, the new increase of 60kg / m heavy rail and 75kg / m heavy rail.

foreign

International countries have their own production of rail standards, classification methods are not the same.

Such as: British standard: BS series (with 90A, 80A, 75A, 75R, 60A, etc.)

German standard: DIN series crane rail.

International Railway Alliance: UIC series.

American Standard: ASCE series.

Japanese standard: JIS series.

? light rail. Varieties are specified in the "8" standard (5). There are 9,12,15,22,30 kg / m and other different rails, the cross-sectional size and rail type, such as 6-7-11 as shown. Technical conditions see "8" in the standard (3).

Light rail is also divided into GB (GB) and the Department of standard (YB Metallurgical Department of standard) two, above that is GB of several models, YB models are: 8,18,24 kg / m and so on.

(2) manufacture and use.

The steel rail is made of flat furnace and oxygen converter. Its use is to withstand the operating pressure of the locomotive and the impact load.

Production plant

Domestic production

China's production of the main rail there are four major rail mill, respectively, Panzhihua Iron and Steel Group Panzhihua Iron and Steel Company, Anshan Iron and Steel Group Anshan Iron and Steel Company, Wuhan Iron and Steel Company,

Foreign imports

Due to the larger amount, still need to import some of our technical standards required by the physical and chemical properties and according to foreign standards and methods to determine the rail and rail accessories. Import production state-owned Japan, Germany, France, Britain, Russia, Australia and so on.