As soon as he heard it, Jiao Dalin ran over with a quick step, but before he could look up at the screen of the flaw detector, he felt that his whole body suddenly flew into the air. He looked down and found that Guo Huaisheng, who was so excited that he was like a child, picked him up with a bear hug, shaking and shouting: "It's done now, it's done now...haha..."

The male workers around were all stunned when they saw this scene. If they hadn't known that the new military representatives were carrying the factory director, these people would probably have sent Guo Huaisheng to a mental hospital in minutes.

But what they didn't know was that Guo Huaisheng almost turned pale because of the weld cracks. You should know that if the minesweeper No. 389 cannot be delivered on time, it is not only the responsibility of Fenjin Factory, but also the responsibility of his military representative.

Now that the wave of disarmament is getting more and more turbulent, it is considered a burning fragrance for a person of his age and who is at his rank and has a position that he has now. I don’t want to lose his military uniform because of a technical reason.

Therefore, Guo Huaisheng is more concerned about the issue of welds than Jiao Dalin. Similarly, when he sees the problem solved, he is more excited than Jiao Dalin.

Fortunately, Jiao Dalin was still very clear-headed. After struggling to break free from Guo Huaisheng's hug, he poured him a basin of cold water: "Didn't you check it well when you were welding before? What's the result? There were all problems in less than a day!"

Guo Huaisheng, who was still excited, suddenly froze when he heard this. He remembered that the weld cracks this time were a little unusual. They only appeared about a day after welding. There was nothing wrong with the welding just now. So he looked at Sun Honghong and asked nervously: "How long have your two boards been welded?"

"Three days!" Sun Honghong's answer was quick, and he seemed to feel that it was a little incomplete. After pausing, he reported a more accurate number: "It's about 75 hours!"

"Look at what I said, what I said...haha..."

As soon as these words were said, Guo Huaisheng, who was full of nervousness, suddenly became excited again. While laughing, he also hammered Jiao Dalin's chest twice as if he was demonstrating.

Just as he was about to run Jiao Dalin who was too cautious in the words, Shang Guangrong, who was still squatting in the steel plate gun, slapped the steel plate in front of him with a puzzled look on his face.

While slapping Guo Huaisheng's words into his stomach, he shook his head in disbelief: "No, this is not right. How can ordinary arc welding be used to weld the special alloy steel for marine POA32 in the Soviet Union? The book does not mean that carbon dioxide gas protective welding should be used? This is not right..."

"Master, who did you hear that the Soviet POA32 marine special alloy steel needs to be protected with carbon dioxide gas?"

Shang Guangrong is Sun Honghong's master, and his welding skills are all derived from Shang Guangrong's personal teachings. The relationship between the two is about the same as father and daughter. So when he saw his master squatting there like a brother, shaking his head straight, Sun Honghong didn't care about his nervousness and quickly stepped forward to ask about the situation.

Shang Guangrong certainly did not hide it: "Of course, the words in "Ship Welding and Materials" published by the Japan Classification Society are written with concise words that Japanese experts have studied the Soviet special marine plates preserved in Yugoslavia, including POA32 marine special alloy steel, and it is clearly marked that the welding can be completed by using carbon dioxide gas protective welding!"

He seemed to be afraid that the people present would not do what he said, and before he finished speaking, he added: "I asked my friends to send the book to me. I read it three or four times before and after, and I would never remember it wrong. If you don't believe it, I will go home and show it to you."

As he said that, Shang Guangrong was about to get up and leave the cabin, but was stopped by Jiao Dalin: "Old Shang, can we believe who you are?" Then he turned his head to Sun Honghong: "Xiao Sun, what method are you using? Why don't you tell Master Shang quickly!"

To be honest, after listening to his master's words, Sun Honghong was also a little confused. What is the Japanese classification society and "Ship Welding and Materials", it feels very good to just listen to this name.

In comparison, she couldn't stand the tables, but since the factory manager asked, she couldn't refuse, so she told her own method in full.

It turns out that the scientific name of the welding cracks at Fenjin Factory is cold cracks, which is a common defect in the welding process of high-strength alloy steel. Because cracks often occur a few hours or days after welding, so they are also called delayed cracks.

The reason for the specific itinerary is very complicated. Sun Honghong can't understand the relevant knowledge of materials, but she grasped one of them, that is, in a humid environment, cold cracks are prone to occur when welding high-strength alloy steel.

Because the humid environment contains a large amount of hydrogen elements, as the temperature decreases during welding, the solubility of hydrogen will also decrease, so a considerable amount of hydrogen precipitates and accumulates near the fusion line of the heat-affected zone to form a hydrogen-rich belt.

When a lattice hole structure appears due to temperature changes here, hydrogen atoms will bind to hydrogen in molecular state in these parts, causing great pressure in local areas. In addition, the welding stress of the material itself, causing a cold crack to occur.

"So the method I used is very simple, which is to use all methods to prevent moisture from the shipboard. At the same time, preheat the welding part with a welding gun before welding, remove the moisture in the air as much as possible, and then construct according to the old method, and then weld it."

Sun Honghong finished her approach in a slight way, then looked at her master with her big eyes, because she obviously felt Shang Guangrong's eyes waiting into two big copper bells at a speed visible to the naked eye. After a while, she asked incredible questions:

“That’s so simple?”

"It's not a hassle!" Sun Honghong replied with a smile.

"Tell me the truth, did Meng Jianye tell you to do this?" Shang Guangrong seemed a little serious.

Sun Honghong shook his head in an old fashioned fashion: "He is so far away, how could he tell me this? At most, he would send me two books and call me stupid in the letter.

If I say that my head doesn’t pretend, don’t make it so complicated all day long, so I chose the easiest way in the book to try it. As long as you can, I can’t do it, and then... um... there’s nothing left, um... Master, what’s wrong with you? Why is your face so ugly? Are you feeling uncomfortable?”

"No...no...I'm fine, let me be quiet, quiet!" Before Sun Honghong finished speaking, Shang Guangrong's face became like a black pot.

In fact, this is not difficult to understand. His apprentice blind cat hits a dead mouse and uses the simplest method to solve the problem that has troubled the Fenjin factory. However, he himself bought books and searched for information, which made it so exciting, but he proposed a completely unsuccessful plan for the factory.

Compared with the two, Shang Guangrong felt that his old face was completely lost, especially the two leaders Jiao Dalin and Guo Huaisheng were still present, which made him feel ashamed. So he left a hurriedly and fled in panic.

Sun Honghong was very confused, and subconsciously scratched his head, and muttered carefully: "Has I said the wrong thing again?"
Chapter completed!