The Red Star Factory will ask for the delivery of the interior panels of two cars tomorrow, and then deliver one car per day until the 30 cars on the order are delivered.

At present, in order to solve the problem, it is first necessary to solve the problem of black welds. Tang Fei took an interior plate and looked at it, and after a little look, Tang Fei frowned slightly.

Tang Fei is not a god, and it is impossible to see what the problem is at a glance.

Noticing Tang Fei's expression, Tang Xuewen sighed, "This problem of the weld being blackened, we even have gray hair, but we haven't found the reason, and even invited the technicians of the Red Star Factory to come over, but it didn't solve the problem." ”

Tang Fei didn't say anything, just looked at the weld seriously.

This is an aluminum alloy weld, which is used for argon shielded welding.

Tang Fei first thought about whether the protection of argon was not in place, so that an oxidation reaction occurred during the welding process, because aluminum is a relatively active metal and can easily react with oxygen in the air.

In our daily life, we have come into contact with all kinds of aluminum alloy products, such as aluminum basins, aluminum barrels, and even aluminum lunch boxes. These aluminum alloy products are not corroded and are very stable, because there is a dense oxide film on the surface, which is well protected, and generally will not easily oxidize and rust.

The welding of aluminum alloy is different, there is no oxide film, the metal aluminum is fused at high temperature, welded together, if the inert gas protection is not in place, there is a little problem, and the weld will have quality problems.

Tang Fei first thought of this, and also looked at the weld carefully in this aspect, and even checked the welding equipment and the quality of argon.

After looking at it like this, Tang Fei ruled out this possibility again.

So what's the problem?

Tang Xuewen said: "Xiao Fei, forget it, I'll ask Xiao He to weld it again." ”

Xiao He is a welder, and his level is not bad. Tang Xuewen is ready to try again, maybe Xiao He can find the problem in the welding process.

Tang Fei didn't think so, even if Xiao He's level was good, in the end he was just a welder, his theoretical level would definitely be limited, if he could find out the problem, he would have found it a long time ago, and it would be useless to try again, it would only be a waste of materials.

"Dad, is there a magnifying glass, preferably a magnifying glass with a larger magnification. ”

Tang Xuewen didn't understand what the magnifying glass was for, but he still said: "I happen to have a magnifying glass, I'll go get it." ”

The magnifying glass was taken, Tang Fei took it and held it in his hand, looked at the weld carefully with the help of the magnifying glass, and even said, "Flashlight!"

A small flashlight was also brought over, a magnifying glass and a flashlight, Tang Fei finally saw some clues, which further confirmed the inference in his heart.

It would have been better if there had been a microscope, but not nothing. Under the current conditions, it is only like this, and it is good to be able to preliminarily confirm your inference.

Tang Fei said in a somewhat affirmative tone: "Dad, I may have a way to solve the problem of blackening the weld." ”

Hearing this, Tang Xuewen was excited, grabbed Tang Fei's arm and said, "Xiao Fei, really?"

It can be seen that Tang Xuewen is like grasping a life-saving straw, as if he has seen the dawn of hope, just now he was still bitter, but now he is excited.

Tang Fei said slowly: "Dad, I'm six or seven percent sure, let me try it and know." ”

"Okay, great. Tang Xuewen was happy for a while, "Xiaofei, what do you need, just say it, as long as the problem of blackening the weld is solved, all the problems will be solved." ”

Tang Fei asked for a thermometer, a hygrometer, and a separate room, which was originally used to store sundries, but now it has been cleaned up.

According to Tang Fei's requirements, air conditioners are also installed, and they are still high-power air conditioners with dehumidification functions, which are all in place one by one according to Tang Fei's requirements.

This movement is a bit big, and many workers are muttering, what kind of fame is this doing, can this solve the problem of blackening the weld.

The small factory is not big, only a dozen people. Everyone knows that there is a problem with the weld, and we know that the problem is serious.

Seeing Tang Fei like this, many people gathered around, and the originally small room was almost crowded with people, all of whom looked at Tang Fei in confusion.

This room has been transformed into a temporary welding room by Tang Fei, with thermometers and hygrometers hanging on the walls, and the air conditioner has also been turned on, and the room has begun to be cooled and dehumidified.

"Xiao Fei, is it okay? I'm going to call Xiao He to come over and weld. ”

Xiao He's name is He Yadong, about 30 years old, and he is the best welder. In the past few days, Xiao He has welded a lot of internal plates, but there has always been the problem of black welds, and none of them are qualified.

Tang Fei looked at the temperature and humidity, nodded and said, "You can weld, but first of all, I will come in person, Xiao He will watch me weld a few pieces on the side first." ”

Are you here in person?

Tang Xuewen looked at Tang Fei in slight consternation, with a look of disbelief, Tang Fei smiled and explained: "Dad, I studied welding in college, it's okay." ”

Seeing that Tang Fei was ready to do it himself, everyone was even more surprised.

"Little boss, you can't do it, let's let Xiao He come!"

A voice sounded, this is Liu Jiang, a man in his forties, with good skills in his hands, he is very good at turning, milling and grinding, and he is also a good person.

In normal times, Liu Jiang is not only the main force of work, but also acts as Tang Xuewen's assistant, especially when Tang Xuewen is not in the factory, Liu Jiang usually manages the workers.

Liu Jiang was reminding him kindly, Tang Fei fully understood, so he smiled and said, "Uncle Liu, I learned welding when I was in school, and I can do this work by myself." ”

During college, Tang Fei had good grades, and carried out a metalworking internship in the school-run factory, and he operated welding by himself, and his level was really good.

In the "later generations", Tang Fei was not only a scholar, but also a doer, often doing it himself, the level is not bad, it is with such a foundation, Tang Fei is ready to come by himself, and weld it himself.

Seeing that there were many people around, and the door of the room was still open, Tang Fei put on welding gloves and welding masks, and said loudly: "Everyone close the door and back a little more." ”

Everyone consciously stepped back a little to make room for Tang Fei to perform. Tang Fei looked at the temperature and humidity and felt that the requirements were completely met, so Tang Fei began to weld.

At first, the movements were a little rusty, but gradually they became proficient, and the first inner plate was quickly welded.

The welder Xiao He looked at Tang Fei's welding, and thought to himself, this proficiency and technical level are better than mine, this is really a college graduate who has just graduated?

After the welding was completed, the next step was to inspect the weld, Tang Xuewen immediately came over and looked at the weld seriously.

Xiao He, who was a welder, also came over immediately, and needless to say, the others all gathered around, and their eyes were fixed on this freshly baked weld.

No way!

Am I mistaken!

The whole room was silent!

…….