As soon as he heard it, Jiao Dalin ran over with an arrow step, but before he could raise his eyes to look at the screen of the flaw detector, he felt that the whole person suddenly took off, and when he looked down, Guo Huaisheng, who was so excited as a child, picked him up with a bear hug, and shouted while shaking: "This is done, this is done...... Haha......"

The surrounding male workers were collectively dumbfounded when they saw this scene, if they didn't know that the factory director was a new military representative, these people estimated that they would be able to send Guo Huaisheng to a mental hospital in minutes.

But what they don't know is that Guo Huaisheng almost didn't worry about the cracks in the weld, and they must know that if the No. 389 minesweeper cannot be delivered on time, it is not only the responsibility of the Endeavor Factory, but also the responsibility of his military representative.

At a time when the tide of disarmament is becoming more and more turbulent, a person of his age and title who is holding the red line can already be regarded as burning incense to have his current position, but he doesn't want to lose his military uniform because of a technical reason.

Therefore, Guo Huaisheng is more concerned about the problem of welds than Jiao Dalin, and he should see the problem solved, and he is more excited than Jiao Dalin.

Fortunately, Jiao Dalin was still very sober-minded, and after struggling to break free from Guo Huaisheng's embrace, he poured a basin of cold water on him: "Didn't you check it well when you welded before, but what happened?

Guo Huaisheng, who was still in the excitement, heard this, the expression on his face suddenly froze, and he remembered that the weld cracks this time were a little unusual, all of them appeared about a day after welding, and there was nothing wrong with the welding just after the welding, so he looked at Sun Honghong, and asked nervously: "How long have your two plates been welded?"

"Three days!" Sun Honghong replied quickly, as if he still felt a little imperfect, and after a pause, he reported a more accurate number: "About 75 hours!"

"Look what I'm saying, I'm saying...... Haha......"

As soon as these words came out, Guo Huaisheng, who was full of nervousness, suddenly became excited again, and while laughing, he also hammered Jiao Dalin's chest twice.

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

While slapping Guo Huaisheng's words into his stomach, he shook his head in disbelief: "No, this is too wrong, how can ordinary arc welding weld Soviet POA32 marine special alloy steel? Doesn't the book say that carbon dioxide gas shielded welding should be used? This is not right......

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

Shang Guangrong is Sun Honghong's master, and all his welding skills are derived from Shang Guangrong's personal inheritance, and the relationship between the two is similar to that of father and daughter, so when he saw his master squatting there like a demon barrier, Sun Honghong didn't care about being nervous, and hurriedly stepped forward to ask about the situation.

Of course, Shang Guangrong did not hide it: "Naturally, it is written in the "Ship Welding and Materials" published by the Japan Classification Society that Japanese experts have studied the Soviet special marine plates stored in Yugoslavia, including POA32 marine special alloy steel, and it is clearly marked that carbon dioxide gas shielded welding can be used to complete the welding!"

As if he was afraid that the people present would not be able to say what he said, he added: "I asked my friends to send me the book, and I have read it three or four times before and after, and it is impossible for me to be mistaken, if you don't believe it, I will go home and show it to you." ”

Saying that, Shang Guangrong was about to get up and leave the cabin, but was stopped by Jiao Dalin: "Old Shang, who are you, can't we still believe it?" and then turned his head to Sun Honghong: "Little Sun, what method are you using, why don't you hurry up and talk to Master Shang!"

To be honest, after listening to his master's words, Sun Honghong was also a little confused, what is the Japanese Classification Society, what is "Ship Welding and Materials", just listening to this name is very powerful.

Compared with it, the method she used was simply not on the table, but since the factory director asked, she couldn't refuse, so she told her own method as it was.

It turns out that the scientific name of the welding crack of the Endeavor factory is called cold crack, which is a relatively common defect in the welding process of high-strength alloy steel, because the crack often appears a few hours or days after welding, so it is also called a delayed crack.

The reason for the specific itinerary is very complicated, involving the relevant knowledge of materials science, Sun Honghong can't figure it out, but she grasps one of the points, that is, in a humid environment, high-strength alloy steel is prone to cold cracks when welding.

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

When the lattice hole structure appears here due to the change of temperature, the hydrogen atoms will bind to the hydrogen in the molecular state at these parts, causing a lot of pressure in the local area, coupled with the welding stress of the material itself, and the weld will cause cold cracks.

"So the method I use is very simple, that is, use all means to prevent moisture for the shipboard, and at the same time use a welding torch to preheat the welding part before welding, remove the moisture in the air as much as possible, and then follow the old method of construction, and then weld it. ”

Sun Honghong finished her method one by one, and then looked at her master with big eyes, because she obviously felt that Shang Guangrong's eyes were waiting for two big copper bells at a speed visible to the naked eye, and only after a while did she ask incredulously:

"Is that easy?"

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

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

Sun Honghong shook his head in an old-fashioned manner: "He is so far away, how can he tell me this, at most, he will mail me two books, and by the way, he will scold me for being stupid."

Saying that I don't pretend to be in my head, don't make it so complicated all the time, so I picked the easiest way in the book to try, okay, if it doesn't work, I can't help it, and then ...... Forehead...... There's no then, uh...... Master, what's wrong with you? Why is your face so ugly, are you not feeling well?"

"No...... No...... I'm fine, let me be quiet, be quiet!" Before Sun Honghong's words were finished, Shang Guangrong's face became like the bottom of a black pot.

In fact, it is not difficult to understand that the apprentice blind cat killed the mouse, and used the simplest way to solve the problem that plagued the Endeavor Factory, but he himself bought books and checked information, which made a lot of trouble, but he proposed a plan that could not be completed at all for the factory.

Compared with the two, Shang Guangrong felt that his old face was lost, especially the two leaders Jiao Dalin and Guo Huaisheng were still present, which made him even more embarrassed, so he hurriedly left a word, and fled in a hurry.

Sun Honghong didn't understand it very much, subconsciously scratched his head, and muttered carefully: "Did I say the wrong thing again?"