Old Zhou is a rough man.
He also has a deep voice.
At this shout, all the students slowed down.
Something's wrong!
What kind of thing did they just vote for?
What is Teacher Ji up to?
Did you get it, Kana?
That shouldn't be the case. Teacher Ji is a trustworthy person, and he is honest and upright.
Teacher Ji was a little embarrassed: "Keep your voice down, keep your voice down, let's talk in the office."
Then, Teacher Ji glared at the students: "What are you looking at! There's no food left in the cafeteria!"
The students immediately scattered.
You can skip everything else, but you have to be enthusiastic about even the most mundane tasks!
"Come on, let's go to the office."
Teacher Ji led Old Zhou around and around until they finally arrived at her small office.
After the two sat down, Teacher Ji asked with a smile, "Old Zhou, did you come here specifically for this?"
Old Zhou nodded: "This isn't the Invar steel welding technology you mentioned last time. I think it has a lot of potential."
"I'm willing to sponsor your research funding!"
Teacher Ji smiled as she looked at Old Zhou.
Since my last visit to Lao Zhou's factory.
He also took the opportunity to talk to Lao Zhou about this matter.
Although Lao Zhou wasn't very interested, he still agreed to fund his research in this area.
But there has been no concrete action taken.
Teacher Ji understood that Old Zhou no longer needed such a high-end welding technique.
A verbal agreement is already a very good outcome.
As for how much he could help with, Lao Zhou didn't say.
But Teacher Ji always felt that Old Zhou must have come for other reasons.
Should we launch a sweet-talking attack first?
Teacher Ji asked, "Old Zhou, let's be frank, is there something else you want to say?"
Old Zhou nodded: "Then I won't beat around the bush, take a look at this drawing."
Teacher Ji took a drawing and studied it for a while.
He asked doubtfully, "Isn't this just a blueprint for a steam turbine rotor? What's there to see?"
Old Zhou was also worried.
The blueprints were indeed obtained from the Hunshui Power Plant.
But it's just an assembly drawing of the rotor.
Jiulin Company didn't even provide the Hunshui Power Plant with the welding drawings.
If there were welding drawings, Lao Zhou could also figure it out.
We are completely in the dark now and have no idea how Jiulin Company welded the alloy on.
Old Zhou pointed to a spot on the blueprint and said, "Teacher Ji, look here, this is called Stellite alloy."
"Now the rotor alloy has fallen off. Without this alloy, the turbine will be severely corroded in water."
Teacher Ji waved her hand and said, "No need to explain, I think I understand."
"The Stellite alloy has come off, and you want to weld it back on, but normal welding methods simply won't work, right?"
Old Zhou's eyes lit up: "That's right, that's right! It's so convenient to communicate with intellectuals!"
Teacher Ji then asked, "There are no welding drawings?"
Old Zhou shook his head: "This is a product from Japan."
Teacher Ji stroked his chin and paced back and forth in the room.
He seems to be thinking about a problem.
quite a while.
Teacher Ji said, "To be honest, I haven't had much experience with Stellite alloys, and they're not commonly used in teaching. I haven't studied them extensively."
"If only we had welding diagrams."
Old Zhou said, "The key is that Jiulin Company is unlikely to give you these blueprints, and I don't know anyone at Jiulin Company."
Teacher Ji nodded.
He then asked, "Did you try to weld it?"
Old Zhou replied, "I've tried electric welding, MIG welding, TIG welding, and water welding, but none of them worked."
Teacher Ji shook his head: "Your welding skills are too basic."
"For example: plasma arc welding, vacuum electron beam welding, resistance welding, flash butt welding, brazing, etc."
Old Zhou shook his head in astonishment.
What is all this stuff?!
I've never even heard of it!
Teacher Ji picked up the blueprints again, looked at them, and said, "Personally, I prefer brazing."
"However, there are many types of brazing: according to the heat source, there are infrared, electron beam, laser, plasma, glow discharge brazing, etc."
"According to the process, it can be divided into: wave brazing, flame brazing, dip brazing, induction brazing, furnace brazing, and vacuum brazing."
"The advantage of brazing is that it can be used to weld the same or different materials."
Old Zhou was completely confused.
You won't believe it until you hear it!
I simply can't remember all these terms.
I was completely dumbfounded.
Teacher Ji said with a smile, "Don't be fooled by the fact that brazing is done in this way; only one of these methods is actually used in steam turbines."
"It's unrealistic for us to try every method."
"For example, vacuum welding requires a vacuum environment, which is not something you can do."
"I can't guess which one it is right now; I can only give the most likely one."
Old Zhou nodded very seriously.
After hearing what he said, things didn't seem so daunting anymore.
Although there are still many problems, as long as there is a direction, everything can be handled.
After a moment of silence, Professor Ji said, "I personally prefer dip soldering."
"This method heats the water evenly and rapidly, and the temperature control is relatively accurate."
"The only trouble is that the workpiece needs to be partially or entirely immersed in a brazing bath covered with flux or a salt bath containing only molten salt for heating and welding."
"A large amount of flux often remains on the workpiece after welding, which requires a lot of cleaning work."
"However, these problems are minor once the Stellite alloy is welded on."
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