Since it was the name of the leader of the Ministry of Railways, he thought about it for a while, and decided to talk about the progress of railway rail technology in the world.
After thinking about it and organizing the language, Zhao Guoyang said in a calm tone: "As we all know, according to our national standards in China and the standards of the Ministry of Metallurgical Industry, steel rails are divided into several categories, such as railway rails, light rails, conductive rails and crane rails. ” "Correspondingly, each country in the world also has its own standards for the production of rails, and their classification methods are not the same."
"For example, the BS series of the English standard, the D series of crane rails of the Germanic standard, and the UIC series of the International Union of Railways" Zhao Guoyang talked about the classification of rails at this time, and the CEOs of the iron and steel companies present basically understood it, and they all nodded in agreement after listening to it.
"Although there are many types, regardless of the country or organization, the rail classification standards are based on roughly the same, that is, expressed in kilograms of rail mass per meter of length.
And 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, who was sitting next to Li Kejian on the rostrum, secretly praised.
He turned his head to look at Li Kejian, smiled and whispered: "Old Li, this researcher Zhao's attainments in rail technology look really good, he is a talent."
Li Kejian glanced sideways at Lin Yuan, and said: "Lin Yuan, you, the chief engineer, have said that he is a talent, then he must be it, but if you want me to say, your evaluation is a little underestimating him."
Lin Yuan didn't quite understand what Li Kejian meant, and looked at Zhao Guoyang below blankly, muttering to himself in his heart: "No, does this young man really have any great ability?"
Offstage, Zhao Guoyang's narration continued.
"The cross-sectional shape of the rail adopts an I-shaped section with the best bending resistance, and is composed of three parts: the rail head, the rail waist and the rail bottom."
"In order to make the rail better withstand the forces from all sides and ensure the necessary strength conditions, the rail should have sufficient height, its head and bottom should have enough area and height, and the waist and bottom should not be too thin."
"At present, most of the rail varieties used in our domestic railways are 38, 43 and 50kg carbon rails.
Although the cost of this kind of rail is low and the production difficulty is not high, its strength, wear resistance, pressure resistance, brittle fracture resistance and fatigue fracture resistance are unsatisfactory, and it is easy to cause rail damage."
"In response to this problem, my research institute is developing a new type of high-carbon low-alloy rail, hoping to make up for the problem of rail vulnerability."
After listening to Zhao Guoyang's remarks, a voice in the audience questioned in a low voice: "This researcher Zhao's words are too far-fetched, isn't it normal for the rail to be damaged, and what does it have to do with the type of steel?"
"Yes, I don't know this point, the rail in the process of use, because the total amount of bearing is too large, for a long time, it is normal to have breaks, cracks and other injuries that affect and limit the performance of the rail."
"As long as our railway department strictly inspects and replaces in time, there will be no big problem."
The discussion in the audience naturally couldn't escape Zhao Guoyang's ears.
He smiled faintly and said confidently: "You may have some questions, thinking that the damage of the rail is an unavoidable event in actual operation, and there are many places."
"But I can pat my chest and reassure everyone that this is definitely not the case" After a slight pause, Zhao Guoyang continued to swear and said: "In fact, in the past year, our shipbuilding special materials research laboratory under Xingtai International Foreign Trade Company has made a detailed investigation and analysis of 32 cases of rail damage in the world. ” "We divide 32 types of damage into nine categories according to the position of the damage on the rail section, the appearance of the damage and the cause of the damage, etc., and classify them with a two-digit number, with ten digits indicating the location and state of the damage, and single digits indicating the cause of the damage.
In the end, the following conclusions were reached" "First of all, the most common type of rail wear, our research has concluded that this wear can be completely solved by adjusting the track geometry.
Through the calculations, we have come up with some conclusive data, that is, if you use the high-carbon, low-alloy rails I said, you can reduce this wear by at least 90%" Listening to the data that Zhao Guoyang said, these entrepreneurs and CEOs in the audience all exclaimed "wow".
You must know that the wear and tear of railway rails is very large, and every year these steel manufacturing companies spend a lot of money on the maintenance of the rails they sell.
If there is a new material that can reduce the wear and tear of the rail by 90%, it will definitely be a good deal, even if it is three times more expensive.
Unlike these entrepreneurs in the audience, several bigwigs on the rostrum had calmer expressions.
Chen Xianshang turned his head sideways, smiled and whispered to the leader Jia beside him: "Old Jia, this Zhao Guoyang is the outstanding young technical backbone that you have been mentioning to me before."
"Listening to his tone, could it be that this research institute under his command has really successfully developed this kind of high-carbon and low-alloy steel rails?"
When Jia Zhichun heard this, he winked at Chen Xianshang a little unfathomably and said, "Hehe, Lao Chen, I'll sell this matter first."
After this researcher Xiao Zhao finishes speaking, I will come to you in detail." was teased by Jia Zhichun like this, Chen Xianshang was a little speechless.
However, he knows Jia Zhichun very well, and he also knows that the other party will definitely not be targeted.
It seems that this Zhao Guoyang, himself and the Ministry of Metallurgical Industry, really want to pay attention to it.
In the audience, Zhao Guoyang's narration continued, he broke his fingers and explained 1510: "The second bell was damaged, that is, the side was worn. ” "Most of this wear occurs on the outer strand rails with small radius curves, which is one of the main types of curve damage nowadays."
"I all know that when the train runs on the curve, the friction and sliding of the wheels and rails is the root cause of the side wear of the outer rail."
"When a train passes through a small radius curve, there is usually a situation where the wheels and rails are in contact at two points, and the side grinding that occurs is the greatest.
The magnitude of the side grinding can be expressed as the product of the guiding force and the impact angle, i.e., the wear factor. ” "Improving the conditions for the train to pass through the curve, such as the use of abrasive wheel treads, the use of radial bogies, etc., will reduce the rate of side grinding."
Speaking of this, Zhao Guoyang paused slightly before continuing to speak: "In addition, from the perspective of public works, improving the material of the rail 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 low-alloy steel rail is about 2 times that of ordinary rails, and more than 1 times that of quenched rails."
With Zhao Guoyang's eloquent talk, everyone seemed to forget his age.
The entire conference room was already immersed in it, and the room was silent.
Zhao Guoyang raised his hand and gestured: "The last kind of injury is wavy wear.
It refers to the wavy uneven wear that occurs on the top surface of the rail, which is essentially a wavy collapse. ” On the rostrum, hearing this, Lin Yuan's eyes became extremely serious.
Glancing at Li Kejian, who was like an old monk, he couldn't help but ask: "Old Li, who is this Researcher Zhao?"
His explanation of the rails is enough to publish articles at the forefront of the industry."
"I've never heard of such a character before, it's really weird."
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Listening to Lin Yuan's sigh, Li Kejian happily explained: "Lin Yuan, you are really right about this.
In fact, Guoyang has published several articles at the forefront of industry before. ” "If it weren't for the fact that he was too busy with his work, I would have wanted him to help me preside over the compilation of this journal."
"What" Listening to Li Kejian's calm words, Lin Yuan almost didn't jump.
The weight of this journal at the forefront of industry can be said to be unique in the domestic industrial system.
Those who can publish articles on this are all technical masters in the domestic industrial system.
Originally, Lin Yuan was already very surprised when he heard that Zhao Guoyang had published one or two articles on it.
But now listening to what Li Lao meant, the level of affection for this little guy is more than that To be favored by Mr.
Li and have the ability to compile such heavyweight industrial journals, I am afraid that there are no more than three or five people in the whole country Thinking of this, when Lin Yuan looked at Zhao Guoyang in the audience, there was a burst of caution on his face.
"Corrugation will cause a high wheel-rail dynamic effect, accelerate the damage of rolling stock and track components, and increase maintenance and repair costs; In addition, the violent vibration of the train will make passengers uncomfortable, and in serious cases, it will also threaten the safety of driving; Corrugation is also a source of noise. ” Zhao Guoyang's narration has gradually come to an end, and he said with some sadness: "A few years ago, there were serious waves on some of our domestic freight trunk lines.
Once or twice, it caused a more serious accident, which is sad."
"In many cases, wavy wear develops faster than side wear and has become the main reason for track changes.
It can be seen that to solve the problem of wavy wear, in addition to grinding the rail, it is also imperative to improve the material of the rail."
"And high-carbon and low-alloy rails, because they are quenched rails, the mechanical properties of the steel are more prominent, which is enough to deal with this problem calmly."
Zhao Guoyang said word by word: "To sum up, it is almost imperative for us to explore high-carbon and low-alloy rails in China.
Finally, I would like to tell you that this is by no means an appeal made by me to flaunt the merits of my own research, but it is a real problem solving approach. ” After looking around, Zhao Guoyang bowed lightly to everyone and said, "That's all I have to say, thank you."
After listening to Zhao Guoyang's sincere explanation, thunderous applause rang out in the entire conference room
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