Why would the train tracks be made of rusty iron rather than stainless steel? What happens when you

The train tracks are made of high-manganese steel, which is particularly resistant to the use of rust on the inside and the inside. If you're using stainless steel, it's particularly susceptible to derailment.

On the one hand, it is for security reasons. Under normal circumstances, the oxide film produced on the surface of stainless steel after rusting will not corrode the inside like manganese steel. However, if it is exposed to a humid environment with large temperature changes for a long time, this oxide film will continue to corrode internally, gradually forming loose iron oxide, resulting in the entire track becoming fragile and easily crushed under the high pressure of the train.

Therefore, the safety factor of manganese steel track is much higher than that of stainless steel track.

On the other hand, because of the cost.

Because the train track needs high hardness steel to manufacture, stainless steel can not bear the weight of the train at all, the hardness of iron is very high, especially suitable for riding the train track, if stainless steel is used, it may cause the train to overturn.

It is because the stainless steel is too expensive, and it is easy to break, in case of accidental breakage, the train will be completely scrapped, and it will also affect our life safety.

This is because the material used to lay the rails is not iron, but steel with high hardness and toughness, which is much better than stainless steel. This is also a misunderstanding of many people's understanding of rails. The rails look like rusty iron, and that's just the appearance.

The life of the rails is very strong, and the rails on ordinary railways can be used for about 10 years.

1.The material used for the rails is harder and of better quality than stainless steel.

The weight of the train is very heavy, and if stainless steel is used, there is a high chance that it will become a dent in less than a year. In order to improve the compressive capacity of the rails, more than 13% of manganese elements are added during smelting, and a certain amount of carbon is also added. Indium metal is also added to the surface in contact with the wheels, so that the rails can maintain their hardness and toughness.

2.The rails are rusty on the outside, so we all think the rails are made of iron.

After the rails are on the slope of the road, after a lot of wind and rain, the appearance will rust, so we think that the material of the rails is iron. In fact, only the exterior will rust, but the internal structure of the rails is still intact. Moreover, the coefficient of thermal expansion of stainless steel is large, and it does not have such good resistance at all, and if stainless steel is used, it will quickly deform.

In addition, stainless steel materials do not save costs, and rainy and snowy weather will be very slippery, which is not conducive to train running.

3.Generally, the life span of rails is more than 10 years.

The life of the rail also depends on the wear of the wheel and rail, generally the rail can be polished normally after wear, but the rail can not be polished indefinitely, and the rail will be scrapped after it cannot be polished. The carrying capacity of skipping a year can reach 400 million tons, and under such heavy crushing, it will be scrapped in a year. But if it is normal driving, the service life of the rails is about 10 years, and the average life of the famous Wuhan Yangtze River Bridge is about seven or eight years.

The life of the rails will generally last for more than 100 years, because they are cold-rolled steel plates, or solid steel generally does not use stainless steel, because the impact pressure of stainless steel is relatively weak, the train will be flattened when walking on it, so it is better to use rusty steel.

Because the hardness of stainless steel is too low, it is likely to be broken, and the life span is about 50 years, and it is replaced once every 50 years.

It is because rusty iron is easier to increase friction, which can make the centrifugal force of the rails stronger, less prone to train accidents, and the life span is about 30 years.

The reason why the rust of the rails does not affect the driving is that the composition is not iron, but a material called high-manganese steel rails, which makes the rails very durable, and the rails of this material can withstand high-pressure wear, which is really a good thing.

The material of the rail is not iron, but a material called high manganese rail, which usually looks very similar to iron, but it is better than the toughness of iron, and it can withstand wind and sun than iron, so this material is most suitable for railway tracks.

Railway tracks, referred to as rails, rails, tracks, etc., are mainly used on railways and work with switches to allow trains to travel without steering.

A railway track usually consists of two parallel rails, which are fixed to the sleeper and ballast under the sleeper. It is fastened by rail braces, fasteners, rail compressors, plywoods, elastic bars, railway studs and other railway accessories.

Railway rails are made of steel and can bear more weight than other materials. Sleepers, also known as sleepers, gray sleepers, or sleepers, are used to distribute the weight of the rail and the pressure on the rail separately, and to maintain a fixed gauge to maintain the gauge of the rail. The original wooden sleeper was changed to a concrete sleeper.

The track is subjected to a variety of vertical, transverse and longitudinal static and dynamic loads, which are transferred from the rail to the roadbed through the sleepers and track beds. Through the theory of mechanics, the stresses and strains generated by each component of the track under various load conditions are analyzed and studied, and their bearing capacity and stability are determined.

Track mechanics analyzes the force and deformation of track structure under the action of rolling stock, as well as the influence of track structure diseases on track damage and train operation, so as to provide a basis for designing track structure and formulating track management standards.

When building train tracks, people preferred to use rusty iron rather than stainless steel. First of all, because the safety of stainless steel material is very general, when it is subjected to the gravity pressure of the train, the internal structure will change rapidly, and finally its external wear resistance will decline rapidly, so the probability of danger will increase. Secondly, stainless steel will rust over time in actual use, but the color of the rust on its surface is the same as its own color, so it is almost invisible to the naked eye.

However, this layer of rust on the surface of stainless steel will cause serious corrosion to itself, and eventually make the quality of stainless steel itself worse and worse. In addition, the cost of stainless steel is high, and the cost of a ton of stainless steel is about three times higher than that of ordinary steel.

1. The safety of stainless steel is average

Stainless steel is usually used in various environments, but in fact, when it comes to safety, especially pressure resistance, stainless steel is really not very good. When a high-speed train is pressed against a stainless steel track, its internal structure changes in a short period of time, which ultimately reduces wear resistance and safety issues.

2. The surface of stainless steel will also rust and corrode itself

Stainless steel will actually produce rust in use, but the color of the rust on its surface is the same color as the stainless steel itself. Although it is difficult to see with the naked eye, this layer of rust will cause corrosion of the stainless steel over time, eventually making it worse and worse and even making the track more and more fragile, and it is possible that the track will suddenly break open one day.

3. The stainless steel track is too high

From the time trains appeared hundreds of years ago, people were thinking about what materials would be used to build train tracks at the lowest cost. Stainless steel is widely used today, but it is more than three times that of ordinary steel. ** Such a high but average quality makes the railway maintenance cost high, and naturally no one wants to use stainless steel to build tracks.

For safety reasons, stainless steel is more affected by thermal expansion and cold contraction than manganese steel, and the internal structure of the rail will change due to years of wind and rain, and the wear resistance will also decrease, which can not bear the weight of the train.

Attentive friends should find that most of the rails are rusty, why don't the rails use stainless steel? You must know that rusty iron will have a significant decrease in strength and toughness, and it is easy to break under high pressure. But rails are so important, why are they made of this kind of iron?

At the beginning of the birth of trains, due to lack of eyesight, ordinary rails were indeed used for laying rails, but such rails were extremely prone to breakage.

We now have the most developed means of transportation, if it is a daily life and work, in addition to buses and taxis, we also have subway stations and shared bicycles to choose from; If you go out for a short distance, you can choose a bus or a self-driving trip; If it is a long trip, the high-speed rail bullet train airport is all fast and safe, we all know that the world is now a village, and it is very convenient for everyone to go to the first place.

However, although we are now more developed means of transportation, the railway bureau is still a better sustainable development, and many passengers choose high-speed rail bullet trains every day, because we all have their own different advantages. Although the train speed is relatively slow, it can go to some remote places, and the ticket is cheap; Although the high-speed rail bullet train tickets are more expensive, it is fast, and there is no need to delay time on the road. People who often take the train and high-speed rail may find that the domestic rails are embroidered, which does not look beautiful at all, so it will rust, so why not use stainless steel plates to build rails?

I'm here to tell you the sake today!

Because the rails are exposed to the air, there is nothing to block, and the wheels of the train have to rub every day, rust is a very common thing, and the beauty and generosity cannot be guaranteed, so many people recommend using stainless steel plates to make rails. We all know that the rails are very long, so many rails in China, all of which are made of carbon steel, if stainless steel plates will be used as raw materials, the price difference generated in the middle is not tens of millions of people can be done, but ** is not the most critical problem, there is also compressive strength.

Now the medium carbon steel we use is carbon steel with a magnesium content of more than 10%, which requires a lot of manganese and carbon elements than ordinary steel, and the hardness and toughness are very strong, especially after the anti-corrosion technology, the surface of the workpiece can reach 500-550 tensile strength, which can withstand the damage and pressure of the current train; Although the stainless steel plate is not corroded, but the lack of patience, it will be affected by the heat rise and contraction, destroy the raw material itself, although the surface looks relatively intact, the inside is dilapidated and unsightly, so it is easy to have an accident, therefore, China can not use stainless steel plate as a raw material, which is confirmed by full consideration!

Although the rails are rusty, they are still safe because they do not affect their load-bearing capacity and toughness. In addition, the reason why stainless steel is not used for rails is mainly because the strength of stainless steel does not meet the requirements of rails.

Because the rails are exposed to the air, there is nothing to block, and the wheels of the train have to rub every day, rust is a very common thing, and the beauty and generosity cannot be guaranteed, so many people recommend using stainless steel plates to make rails. We all know that the rails are very long, so many rails in China, all of which are made of carbon steel, if stainless steel plates will be used as raw materials, the price difference generated in the middle is not tens of millions of people can be done, but ** is not the most critical problem, there is also compressive strength.

Now the medium carbon steel we use is carbon steel with a magnesium content of more than 10%, which requires a lot of manganese and carbon elements than ordinary steel, and the hardness and toughness are very strong, especially after the anti-corrosion technology, the surface of the workpiece can reach 500-550 tensile strength, which can withstand the damage and pressure of the current train; Although the stainless steel plate is not corroded, but the lack of patience, it will be affected by the heat rise and contraction, destroy the raw material itself, although the surface looks relatively intact, the inside is dilapidated and unsightly, so it is easy to have an accident, therefore, China can not use stainless steel plate as a raw material, which is confirmed by full consideration!

The high-speed rail track is very strong, and although it will rust, it will also be maintained regularly. With stainless steel, the hardness is not attainable.

The rails should have sufficient tensile strength, good wear resistance, high resistance to peeling and fatigue, and good weldability. The strength of stainless steel is not reached, and it is not wear-resistant, and the cost is also expensive.

1. Technically speaking, stainless steel is not rusty, but the color after rusting is almost the same as the color before rusting; Its properties are not suitable for use in all places, so stainless steel cannot be generalized as a substitute for other materials.

2. In terms of resources, nickel and chromium used in stainless steel are relatively scarce minerals, especially nickel is in short supply.

3. In terms of cost, the cost of buying materials, making parts, and installing machines will be considered. Stainless steel is higher than ordinary steel, aluminum, magnesium-aluminum alloy, plastic and other materials, but several times different.