Since it was named by the leader Jia of the Ministry of Railways, he thought about it and decided to talk about the progress of the technology of railway rails internationally.

After thinking about it and organizing the language, Zhao Guoyang said calmly in a tone: "As we all know, steel rails are divided into railway rails, light rails, conductive rails and crane rails according to our national standards in China and the standards of the Ministry of Metallurgical Industry."

"Compared with this, international countries also have their own standards for producing rails, and their classification methods are also different."

"For example, the English standard BS series, the German standard din series crane rail, and the International Railway Alliance's UIC series..."

The presidents of the steel companies here basically understand the classification of the rails that Zhao Guoyang has talked about at this moment, and after hearing this, they nodded in agreement.

"Although there are many types, no matter which country or organization the rail classification standards are based on, the basis is roughly equivalent, which is expressed by the mass kilograms of rails per meter. This data has a lot to do with the cross-sectional shape of the rail..."

When Zhao Guoyang said this, Lin Yuan, chief engineer of the Ministry of Metallurgical Industry sitting next to Li Kejian on the rostrum, secretly praised him.

He turned to look at Li Kejian, smiled and whispered, "Old Li, this researcher Zhao's attainment in rail technology looks really good, he is a talent!"

Li Kejian turned his head and glanced at Lin Yuan, and smiled: "Lin Yuan, you, the chief engineer, said that he is a talent, so he must be. However, if I want to say, your evaluation is a bit underestimated by him..."

Lin Yuan didn't quite understand what Li Kejian meant, so he looked at Zhao Guoyang below in a daze, muttering to himself: "No, is this young man really having any extraordinary abilities?"

In the audience, Zhao Guoyang's story continues.

"The cross-sectional shape of the rail is composed of three parts: I-shaped section with the best bending resistance, rail head, rail waist and rail bottom."

"In order to make the rail better withstand forces from all aspects and ensure the necessary strength conditions, the rail should have sufficient height, the head and bottom should have sufficient area and height, and the waist and bottom should not be too thin."

"At present, all the types of rails used in our domestic railways are mostly carbon rails of 38, 43, 50kg/m. Although this type of rail is cheap and has low production difficulty, its strength, wear resistance, pressure resistance, brittle fracture resistance and fatigue fracture resistance are all unsatisfactory, and rail damage is prone to occur!"

"In response to this problem, my institute is developing a new type of high-carbon and low-alloy rail in a hurry. I hope it can make up for the problem of rails being easily damaged..."

After listening to Zhao Guoyang's story, a voice from the audience whispered and questioned: "This researcher Zhao's words are too far-fetched? Isn't the damage to the rails very normal? What does this have to do with the type of steel?"

"Yes, I don't know this! During the use of the rail, it is normal for breakage, cracks, and other injuries that affect and limit the performance of the rails to be damaged!"

"As long as our railway department strictly inspects and replaces it in time, there will basically be no big problems!"

The discussions in the audience naturally could not escape Zhao Guoyang's ears.

He smiled faintly and said confidently: "You may have some questions and think that the damage to the rail is a very difficult event to avoid in actual operation, and there are many places!"

"But I can pat my chest to guarantee everyone that this is definitely not the case!"

After a brief pause, Zhao Guoyang continued to swear and said: "In fact, in the past year, our 'Ship Manufacturing-Special Materials' Research Office, a subsidiary of Xingtai International Foreign Trade Company, has conducted a detailed investigation and analysis of 32 international rail damage incidents."

"We divided it into nine types of 32 injuries based on the position of the injury on the rail section, the appearance of the injury and the cause of the injury. We classified it with two-digit numbers, ten-digit numbers represent the location and status of the injury, and single-digit numbers represent the cause of the injury. Finally, the following conclusions are drawn..."

"First of all, the most common rail wear, our institute concluded that this wear can be completely solved by adjusting the rail geometry. Through calculations, we have obtained some conclusive data, that is, if we use the high-carbon and low-alloy rails I mentioned, this wear can be reduced by at least 90%..."

After hearing the data Zhao Guoyang said, the entrepreneurs and bosses in the audience exclaimed "wow".

You should know that the wear of railway rails is very large. Every year, these steel manufacturing companies spend money on maintaining the rails they sell, which is a huge number.

If there is a new material that can reduce the wear of the rail by 90%, it will be absolutely cost-effective even if it is three times more expensive.

Unlike the entrepreneurs below the stage, the big guys on the rostrum had a calm expression.

Chen Xianshang turned his head and smiled at the leader Jia beside him and whispered: "Old Jia, this Zhao Guoyang is the outstanding young technical backbone you have mentioned to me before, right?"

"I heard from his tone, could the institute under his command have really successfully developed this high-carbon and low-alloy rail?"

Upon hearing this, Jia Zhichun blinked at Chen Xianshang in a bit inexplicable way and said, "Hehe, Old Chen, I'm sorry to keep this matter aside. After this researcher Xiao Zhao finished speaking, I'll come with you in detail!"

Chen Xianshang was speechless after being teased by Jia Zhichun.

However, he knew Jia Zhichun very well and knew that the other party would never be aimless.

It seems that Zhao Guoyang, himself and the Ministry of Metallurgical Industry, really need to pay attention to it.

In the audience, Zhao Guoyang's story continued. He spread his fingers and explained in detail: "The damage in the second minute is the wear of the side."

"This wear mostly occurs on the outer strand rails with small radius curves, and is one of the main types of damage on the curves now."

"I all know that when a train runs on a curve, the friction and sliding of the wheels and rails are the fundamental reasons for the outer rail side grinding."

"When a train passes through a small radius curve, the wheel and rail contacts, and the side grinding occurs at this time is the largest. The size of the side grinding can be expressed by the product of the conductor force and the impact angle, that is, the wear factor."

"Improving the conditions for the train to pass the curve, such as using wear-type wheel treads, and using radial bogies, etc., will reduce the rate of side grinding."

Speaking of this, Zhao Guoyang paused for a moment before continuing to speak: "In addition, from an industrial perspective, improving the material of rails and using wear-resistant rails, such as high-carbon and low-alloy rails, can also solve some problems. Because the wear resistance of this high-carbon and low-alloy rail is about twice that of ordinary rails, and the quenching rails is more than 1 times!"

With Zhao Guoyang's talk, everyone seemed to have forgotten his age. Everyone in the entire conference room was immersed in it, and the conference room was extremely quiet.

Zhao Guoyang raised his hand and gestured: "The last type of injury is wavy wear. It refers to the wavy uneven wear that appears on the top of the rail, which is essentially wavy collapse."

On the rostrum, Lin Yuan's eyes became extremely serious when he heard this.

After looking at Li Kejian who was like an old monk entering meditation, he couldn't help asking: "Old Li, who is this researcher Zhao? His explanation of the rails is enough to publish an article in "The Frontier of Industry"!"

"I haven't heard of such a person before. It's so strange..."

After hearing Lin Yuan's sigh, Li Kejian explained happily: "Lin Yuan, you are really right about this. In fact, Guoyang has published several articles in "The Frontier of Industry" before."

"If he hadn't been too busy with work, I would have wanted him to help me preside over the editorial work of this journal!"

"What?" After hearing Li Kejian's calm words, Lin Yuan almost jumped up.

The weight of the journal "The Frontier of Industry" can be said to be unique in the domestic industrial system.

Those who can publish articles on this are all technical experts in the domestic industrial system.

Lin Yuan was already surprised to hear that Zhao Guoyang had published one or two articles on it.

But now, after hearing what Mr. Li said, the level of this little guy is more than that!

I am afraid that there are still many people who are favored by Mr. Li and who are capable of editing such heavyweight industrial journals in China, I am afraid that there are still many people in China who are looking for?

After understanding this, Lin Yuan looked at Zhao Guoyang below the stage and felt a little more cautious on his face.

"The wave mill will cause a very high wheel and rail power effect, accelerating the damage of the rolling stock and the track components, and increasing maintenance costs; in addition, the violent vibration of the train will make passengers uncomfortable, and in severe cases it will also threaten driving safety; the wave mill is also the source of noise."

Zhao Guoyang's story has gradually come to an end. He said with some pain: "A few years ago, some domestic freight trunk lines have experienced severe waves. Once or twice, it has caused serious accidents, which is heartbreaking!"

"Many times, the development speed of wavy wear is faster than that of side grinding, which has become the main reason for rail replacement. It can be seen that in addition to polishing the rail, it is also imperative to improve the material of the rail!"

"Why high-carbon and low-alloy rails are made of quenched rails, the mechanical properties of steel are more prominent, which is enough to deal with this problem calmly!"

Zhao Guoyang said in the last sentence: "To sum up, it is almost imperative for our country to explore high-carbon and low-alloy rails. Finally, what I want to tell you is that this is definitely not my appeal to show off my credit for the research institute, but is truly facing it from the perspective of solving the problem."

After patrolling around, Zhao Guoyang bowed gently to everyone and said, "I want to say so much, thank you everyone!"
Chapter completed!