What is railway crossover?
A crossover or interlocking is a pair of switches that connects two parallel rail tracks, allowing a train on one track to cross over to the other. A crossover can also join two tracks of the same direction, possibly a pair of local and express tracks, and allow trains to switch from one to the other.
Why is steel used in railway tracks?
Steel being a better and stronger material than cast iron, in due course, it replaced the cast iron as the material for use in making rails. Evolution of rail steel: The first use of iron in the making of rail was in the form of a cast iron plate fitted over wooden rail.
What should be added to manganese steel?
Other alloy elements include up to 2% Manganese and small quantities of copper, nickel, calcium, chromium, vanadium and titanium. These elements are added to strengthen the steel and improve corrosion resistance.
What is difference between turnout and crossover?
Basic types of turnouts include a “Single turnout” that diverges one rail track into two directions, a “Diamond crossing” that intersects two tracks,and a “Crossover” that connects two side-by-side tracks.
What are points and crossings?
• Point and Crossings are peculiar arrangement used in permanent way (railway track) to guide the trains for directional change.
Which is steel is used in making railway tracks?
The normal rails are made of steel containing 0.7% C and 1% Mn, which are called as C-Mn rail steel. From a strength perspective (ultimate tensile strength of 880 MPa or 90 Kg/ Sq mm), the C-Mn rail is popularly known as 90 UTS rail or Grade 880 rail.
How are railways and the steel industry related?
For this, railways and the steel industry work in close co-ordination with each other. The rail track is known as a stable structure. It ensures the transportation of trains through providing a dependable surface for their wheels. As to the development of rail track, it has a long history.
Why do steel railways not rust and fall apart?
The rail company also grind the track to remove surface imperfections caused by the trains braking, if these imperfections were allowed to worsen and deepen, the high impact force of the train hitting them at high speed could cause the rail to fracture. Coating rails.
How is the fineness of rail steel determined?
The fineness of the pearlite structure (inter lamellar spacing) of rail steel is controlled by the rate at which the hot rail cools. Heat treatment methods are available to control the cooling rates and control the microstructure which in turn controls the hardness and strength of the rail steel.