After Teacher Ji finished reviewing the drawings.
Some were dismissive, thinking it was some kind of high-difficulty welding.
It is challenging.
But in the eyes of a seasoned teacher like Teacher Ji.
The welding shouldn't be a big problem.
How come a factory doesn't have many workers who can do this job?
But Teacher Ji also thought of it from another angle.
The technological gap in factories today is so severe.
It is estimated that these phenomena are widespread.
The older generation's techniques have become fixed, while the new generation hasn't gained enough experience.
It's stuck right here.
Thinking of this, Teacher Ji felt a pang of heartache.
If this continues, what will happen to the future of technological inheritance in mainland China?
There is an urgent need for vocational technical schools to train welders!
but……
The current situation in China is that if you don't get into a vocational high school, you won't be able to get involved in professional welding.
The only option was to go to the factory and learn from experienced workers.
But how many students can actually get into a vocational high school?
Even if they pass the exam, how many students would be willing to study this stuff?
The barrier to entry is still too high!
When Lao Zhou heard Teacher Ji say that, he suggested that Peng Miaomiao should just do the job.
A thought struck me.
That's great!
Old Zhou said, "Yes, yes, that's fine!"
But the other workers scoffed and whispered among themselves:
"A girl like you probably doesn't even know what a welding torch is, right?"
"I don't know if the boss is out of his mind. What kind of trash did he hire?"
"That's a bit pretentious and condescending. How can someone so young compare to a seasoned master?"
"I think it would be better to use this money to bring the master craftsman back."
"Exactly, the old man is so pretentious, the younger one just doesn't look good."
Ignoring the others' comments, Wu Changfeng went over to Old Zhou and poked him, saying, "What do you mean, 'okay'? Have you forgotten what you invited Peng Miaomiao for?"
"Ah! Right, they're here for training!" Old Zhou finally came to his senses.
If this job were given to Peng Miaomiao.
Not to mention that it takes even longer for a girl.
Others have finished the work, but your workers haven't learned anything!
This crisis is over.
What about next time?
Please invite Peng Miaomiao again?
Their appearance fee is enough to cover a lot of salaries.
It's not worth the risk!
But the attitude of the workers on the other side made Peng Miaomiao a little unhappy.
Although the sound was soft, it was still audible.
What do you mean I don't know what a welding torch is?
Whom do you look down on?
Peng Miaomiao looked at Teacher Ji, what should be done in this situation?
Teacher Ji said, "Pigsy lifts the curtain. Show them what you've got, and intimidate them, otherwise we won't be able to teach any more classes."
Peng Miaomiao nodded.
He turned on the welding machine and adjusted the current without thinking.
Actually, this workpiece is a scrapped workpiece.
After the veteran worker quit, Lao Zhou organized the workers to tackle the problem.
The welding was successful.
But once a tensile test is conducted, it immediately fails.
The weld was torn open directly.
It's completely unqualified.
What Peng Miaomiao had to do was weld the crack shut.
Of course.
If Peng Miaomiao is willing, Lao Zhou can also provide brand new workpieces.
Old Zhou also intended to test Peng Miaomiao.
Wu Changfeng said Peng Miaomiao was awesome, but he'd only feel at ease if she actually showed her skills.
Peng Miaomiao glanced at the crack.
He said with a showy tone, "This kind of cracking is called lamellar tearing. It means that this steel plate is actually made up of layers. When you pull it in a tensile test, it tears the steel plate into several layers. Because each layer is not as thick as the original, it can't withstand the force, so it breaks and becomes like this."
Teacher Ji nodded with satisfaction.
They hadn't forgotten any of the theoretical knowledge, and they even found the cause of the fracture.
Everyone else was dumbfounded.
I can understand each word individually, but when they're put together, I have no idea what they mean.
Zhou Huanxiong asked from the side, "Isn't the steel plate a single piece? Why are there layers?"
Professor Ji stated, "This type of lamellar tear has been rarely studied in the past because it occurs far less frequently than other types of cracks."
"The reason for this is that there are air bubbles or other impurities in the cast steel ingot. During the rolling process, these air bubbles or impurities are pressed into strips, resulting in interlayers in the material."
"The steel rolled out in this way looks like a single piece, but it actually has a layered structure inside."
"To put it bluntly, it's like a sealed book. It looks like a whole, but when you remove the sealant, the number of pages inside comes out."
"This situation is relatively rare, which is attributed to the fact that the steel rolling technology is not very advanced."
Everyone nodded in agreement after hearing this.
There's so much to learn inside.
Impurities are what cause this phenomenon in the steel plate.
It can be said that this is a fact that cannot be changed at present, and the only way to repair it is through welding.
Wu Changfeng suddenly understood why Dahua Steel Plant was so persistent in introducing new steel rolling technology.
They may have also discovered problems with the current steel.
We need to improve the quality of steel to pave the way for high-end steel in the future.
Without saying a word, Peng Miaomiao picked up the welding torch, lit the arc, and started welding.
The others picked up their welding helmets and examined the workpiece.
Wu Changfeng dared not look.
Without a welding helmet, looking directly at the welding torch is just asking for trouble.
A short while later.
Wu Changfeng then heard the workers exclaim in surprise:
"This molten iron is really something."
"The rhythm is excellent."
"Is this for welding fish scale patterns?"
"The molten pool has a beautiful color, and not a single air bubble got in!"
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