Chapter 91 The real first step of ESR
The protagonist of the training, Gao Zhendong, did not know that the establishment of a sect was just around the corner.
What he is doing now is something else.
——Prototype joint debugging of ESR consumable electrode insertion control system.
The power supply of ESR is not complicated. Comrades have already prepared it. Although the sliding crystallizer is ready, it is not ready to slide for the time being, so what is related to the control system now is the ESR consumable electrode. The insert controls this one.
The electroslag Gao Zhendong has also prepared it. He did not choose the calcium fluoride-alumina binary high fluoride slag system that is already in use. The calcium fluoride content of this type of electroslag is as high as 70%. The advantage is that the hydrogen permeability is the lowest. However, there are also outstanding problems such as serious fluorine pollution and high power consumption.
He chose the calcium fluoride-calcium oxide-alumina-magnesia quaternary slag system that will be used in the future. Calcium oxide and magnesium oxide are used to partially replace calcium fluoride. At the same time, the smelting does not contain titanium or aluminum. When making alloys with boron, silica can also be added to further improve hydrogen permeability.
The advantage of this slag system is that while reducing power consumption, it ensures that there is basically no hydrogenation in the alloy, and at the same time, fluorine emissions are significantly reduced.
In the ESR test workshop, as everyone took their places and completed the safety inspection, Gao Zhendong looked at his watch, wrote down the time, and gave an order: "Power on."
Switch When it is closed, the power supply emits a unique buzzing sound, a flash of light lights up at the contact point between the consumable electrode and the electroslag, and the molten pool gradually builds up.
Gao Zhendong directed the experimenters to set the working voltage and current, and began to observe and record changes in voltage and current.
Contrary to what ordinary people imagine, the working voltage used in electroslag remelting is not high, generally no more than 100 volts, but the working current is very large, up to thousands of amps.
As the consumable electrode with a diameter of 200mm slowly moves up and down in the electroslag, the working current gradually stabilizes at the set parameters. As it melts itself, it continues to fall downwards. It also became gradually regular.
Fang Yinghong led a team of testers and began to fine-tune the working voltage.
As the working voltage changes, the falling speed of the consumable electrode also begins to change, and even when necessary, the consumable electrode is increased.
The operating current has been changing slightly around the set value, and the change amplitude is completely within the expected range.
As time goes by, the experiment gradually comes to an end.
Gao Zhendong looked up his watch and saw that the time had reached the requirements of the test plan, and issued an instruction: "Stop the test."
The test personnel were busy executing the stop action of the test in an orderly manner.
As the last switch was turned off, every test record was handed over to Gao Zhendong.
All the testers stopped and looked at Gao Zhendong, who was looking through the test records.
Gao Zhendong carefully reviewed the various test records, raised his head, looked at everyone, raised a stack of experimental records in his hand, and said loudly: "I announce that the ESR consumable electrode control system joint debugging test , a complete success!”
Everyone burst into applause and cheered.
“Successful!!”
“Successful!!”
"Oh! Oh! Oh! Oh!"
"Haha! Haha! Good! Good!"
If they were not in the test workshop, they could even run and dance here.
The success of the joint debugging test of the ESR consumable electrode control system not only means the establishment of the electrode control and working current and voltage working conditions. It also means the successful trial production of the entire power supply system including power supply and short network.
At the same time, the most basic working principle of electroslag remelting has also been verified. Next, is the next stage of the test.
After everyone vented their emotions for a while, Gao Zhendong pressed his hands slightly, everyone quieted down, and Gao Zhendong spoke again.
“I know everyone is very happy, and I am also very happy, but let’s not be happy yet. Next, there are droplets, molten pools, metallography, electroslag optimization, working electrical parameter selection, and sliding crystallization A series of difficulties are waiting for us. Comrades, do you have any confidence?"
The comrades present all shouted: "Yes!"
The voice was deafening. .
Gao Zhendong laughed loudly: "Okay, we just have to have this energy. I believe that in our hands, we will be able to come up with a better ESR process. Of course, work has to be done, and food has to be eaten. I asked the leader for instructions. Today, the canteen in the factory prepared a decent "overtime meal" for us. When the meal time comes, our entire ESR team will go and deal with it. ”
When he said the words "fairly good", Gao Zhendong increased his tone and gave a few winks to all the testers.
Everyone understood and laughed.
Seeing that it was almost done, Gao Zhendong asked Liang Fafa to make preparations for the aftermath of the test and the next step, and returned to the office.
Because someone came to inform him that there were two people waiting for him in the office.
The first one was a correspondent from the 17th Machinery Department, who came to inform Gao Zhendong about the training and preparation for the "Project Management System" book.
After receiving the training preparation notice, Gao Zhendong estimated his time, confirmed the training time with the communicator of the 17th Machinery Department, and put the matter aside for the time being.
Preparation takes time, and the organization of the 17th Machinery Department also takes time. This matter is not urgent.
Anyway, for him, the teaching material is the book he wrote, and during the adaptation process, he has fully understood the contents of the book, and can train with a little preparation.
In addition, Liang Fafa, Fang Yinghong, and Liu Rongguo, the three people in the research laboratory who participated in the proofreading, can be hired as teaching assistants when they have time. At least in terms of training and assessment, they can help.
In this way, they can show their faces in front of the students and make a name for themselves, and they can reduce their work pressure. The students also get better training support. It is a win-win situation and everyone has a bright future.
After the ministry correspondent left, the second person was Lin Lianwei, whom he had not seen for a while.
He has been here for a while. He heard that Gao Zhendong was doing experiments in the experimental workshop. He is knowledgeable. It is an important place for experiments and should not be seen. He did not go to look for it. Instead, he was in Gao Zhendong. The office is waiting.
Gao Zhendong poured him a glass of water and joked: "Lian Wei, you run here every now and then. Your company didn't deduct all your salary? Haha."
Lin Lianwei chuckled. : "Thanks to you, I'm here for business, which means you're close. If you were farther away, my unit would have to give me a business subsidy."
Hearing that Lin Lianwei had business, Gao Zhendong sat down and asked: "Is there business? Do you want me to help contact the factory?"
Lin Lianwei shook his head: "No, I'll find you."
He had nothing to do. He came to see Gao Zhendong. Because he had to keep it confidential, he couldn't call directly. And because he didn't tell her, he couldn't apply for confidential access, so he had to run away by himself.
Gao Zhendong took out a pen and paper and said without any nonsense: "Oh, well, if you want anything, tell me."
(End of this chapter)