Chapter 262: Asphalt with asphalt?
At night, a note was posted at the gate of the compound, saying that a general meeting of the compound would be held on Monday night and that there would be good news to announce to everyone.

Why were the previous academy meetings held on the same day, but this time it had to be held on Monday? This has to do with what Yi Zhonghai is thinking.

The previous ones were all messes, so naturally they had to cut the Gordian knot. What was needed was the name of a full-institution meeting. To use Gao Zhendong's words from his previous life - procedural justice was enough, and as for the number of people involved, the fewer the better.

This is a good thing, so naturally we want to spread the news throughout the hospital. We want the effect of publicity - it's result-oriented, and we want even the little kids to come and participate.

This is not some empty talk. It can be regarded as Yi Zhonghai's working experience in the compound. Bad things will not leave the door early, but good things will spread far and wide. There is nothing wrong with it.

When Gao Zhendong saw the note when he went out in the morning, he couldn't help but give a thumbs up to Yi Zhonghai's arrangement. After all, everyone still prefers things that are in line with public order and good morals.

After arriving at the factory, Gao Zhendong continued his welding career. When debugging hardware circuits, the equipment at the factory was more complete and the electricity was more guaranteed.

Under normal circumstances, he is usually tough at work but soft at home, so the division of labor can be considered clear.

But what he didn't expect was that an old acquaintance he had just remembered two days ago came.

Mr. Duan and their hospital's guest, Mr. Cai, flew to the capital.

He did not come with the component transport vehicle and was a bit slow. After asking the Defense Work Committee and receiving a positive reply, they directly issued a letter of introduction, booked tickets, and flew to the capital.

They were not surprised to get the approval from the Defense Work Committee. Mr. Cai's affairs were top priority. It could even be said that without so many "Mr. Cai"'s various projects, Gao Zhendong himself would not be so important.

It is not easy to take a plane these days. Unless you have something urgent to do, you can't take one. So although they got the permission on Saturday, they didn't arrive in Beijing until Monday afternoon.

This is already the fastest. After going through a set of processes, this speed can be said to be extremely fast.

It took Duan Gong some trouble to get into Gao Zhendong's office.

Although the office is still the same office, there seem to be more procedures and formalities.

Mr. Cai, who has received similar treatment, was delighted to see this and couldn't help but look forward to this visit even more.

Duan Gong knocked on the door of Gao Zhendong's office, but no one answered. Someone nearby pointed out, "Comrade, Director Gao is in his computer room, right here."

The two of them then met the "Welding Emperor" Gao Zhendong in the computer room next door where the smell of pine resin was wafting in the air.

Looking at the equipment in this room, especially the DJS-59, Mr. Cai felt confident! He was a team member who could only have one, but looking at Director Gao, he was using one by himself! It was stable.

But I never expected that this comrade who works on materials actually likes electronics as a hobby and even brings it to work.

Gao Zhendong invited them to sit down in his office. After all, the computer room was filled with the scent of pine and the hum of electricity. If he had a choice, it wouldn't be a good place to have a conversation.

Duan Gong was used to it. He didn't feel embarrassed after doing it so many times. He took the tea handed over by Gao Zhendong and took a sip: "Director Gao, I trouble you again this time. Well, this tea is good."

Since they were old acquaintances, Gao Zhendong didn't bother to be polite: "What's the matter? Tell me. The tea is good, right? I'll give you two some later, haha."

What a pleasant surprise! Director Gao's tea is really good, Mr. Cai thought. Good tea is rare these days, and if it's not "high quality", it's already pretty good.

What am I thinking? Is it because I am too relaxed here? Mr. Cai laughed at himself in his heart.

Duan Gong took out materials from his bag and said, "It's still about the high-performance graphite throat liner last time. Your advice was very effective. We have successfully burned a batch of them. There was no cracking during the pressing process. The overall performance indicators are also good, but there is a small problem."

Gao Zhendong smiled and said, "That's a good thing. You guys are not simple this time. But if there are any small problems, we can communicate over the phone. Why did you come all the way here? Have you never taken a car before?"

Gao Zhendong really admired them. Apart from asking him to solve the problem of cracking during pressing of the billet material, all other problems with this high-performance material were solved by the Carbon Research Institute themselves. Although the material was very similar to the one he had, it was not surprising.

It is not surprising that similar conditions, similar staff, and similar overall environment lead to similar results. What's more, they developed this thing many years ahead of time, so it is still a long way to go for this thing to be released.

Seeing Gao Zhendong joking, Duan Gong also laughed: "Since you gave us so many suggestions, we changed the adhesive and greatly improved the process. The effect is indeed very good, but there was a problem in the last step. This thing is quite urgent, and there are other things to do, so it is safer to just go there directly. This is the user of the material, and he has a lot of questions to discuss with you."

As Duan Gong spoke, he handed the graphite throat lining test data to Gao Zhendong, and General Manager Cai quickly corrected: "Asking for advice, it means asking for advice, not communicating." Gao Zhendong did not dwell on this specific statement. He opened the test data and looked at it carefully. There was no coding in the data. It was all open and very detailed.

Sure enough, everything looks good. Although the data is slightly lower than the graphite throat liner that Gao Zhendong has, there is no essential difference. Overall, they are of the same order of magnitude.

But at the end, Gao Zhendong almost laughed out loud.

It's not that he was gloating, but he didn't expect that the Carbon Research Institute would fall into the same pit as that paper. It seems that technological inertia does exist, and the technical route they chose is basically the same as the one seen in the previous life.

Since I couldn't ask them about the specific ratio, I couldn't remind them of this, and as a result, they went back to their old ways.

Seriously, don't laugh! For a moment, he actually felt a little funny, like "Don't laugh at your fellow motorcycle riders."

Since it is this problem, the cause is probably similar, so Gao Zhendong won't waste time beating around the bush.

"The problem is cracking, right?"

Engineer Duan nodded and said, "Yes, you have seen it too. All of them have serious cracks, all batches have them. If it was an isolated incident, we could look for other reasons, but if they are all like this, then there must be something we haven't considered well, and there is a problem at the root. So I came here to ask you to take a look. I think you seem to be quite knowledgeable about cracks, haha."

Old Duan was in a good mood, and he wasn't even depressed anymore.

In fact, when doing research, there is no need to be afraid of these very obvious, large-scale, and regular problems, no matter how big they are, because the causes are mostly clear, and the results are nothing more than two: find the problem and solve it; find the problem, but can't solve it, and that's it.

Generally, it is possible to find the problem, but whether the problem can be solved after being found is another matter. No matter what the result is, the worst case scenario is that you will get a scar the size of a bowl after chopping off your head, which is refreshing and not torturous.

On the contrary, it is the kind of sporadic problems that have no clear pattern that are troublesome.

Take another industry as an example. If the account difference is hundreds of millions or tens of millions, the finance department will say: It’s no big deal. If the account difference is only one cent, the finance department will say: Screw me!

Seeing Lao Duan's expression, Gao Zhendong smiled. This old man was really interesting. "What kind of raw materials do you use?"

The test results of this thing will not be revealed. Duan Gong did not hesitate: "The main ingredients are asphalt coke or artificial graphite powder, and their mixture, but the situation is like that."

Gao Zhendong said without hesitation: "Artificial graphite powder won't work. It has a low affinity with the adhesive and poor bonding effect, resulting in poor thermal shock resistance."

Thermal shock resistance. The thermal shock here has nothing to do with vibration, but refers to the drastic change in temperature. Simply put, it is the ability to not cause problems or major problems when the temperature changes drastically.

Duan Gong understood: "Is that so? But what about asphalt coke? It should have a good affinity with sulfur-modified asphalt binder, asphalt goes with asphalt. You helped us choose this adhesive, it's really good."

Gao Zhendong was amused. Old Duan's words reminded him of the last time they chose an adhesive. Because sulfur would accelerate the aging of asphalt, they did not consider the most suitable sulfur-modified asphalt. They did not think that the adhesive would have to be burned, and the final product would have nothing to do with asphalt at all.

He smiled and said, "Old Duan, cracking has some bearing on this, but not much. Pitch coke affinity is OK, but there is a problem. After graphitization, it is brittle, and the thermal expansion coefficient, elastic modulus, and resistance are relatively large, but the thermal conductivity is relatively low."

With every word he spoke, Duan Gong's face turned paler. It was over, it was over. It seemed that asphalt coke could not be used. These characteristics were all intended to prevent cracking under thermal shock. It was simply tailor-made for the purpose. But if asphalt coke was not used, what could be used as a substitute?
Mr. Cai also felt gloomy after hearing this. Did everything he had done before just go in vain?

However, when Old Duan saw Gao Zhendong's expression, he was no longer worried. Since he could smile so happily, he must have a backup plan. Others might not know Director Gao, but how could he not know?

He chuckled, "Director Gao, let's be frank. You must have a solution, right?"

Mr. Cai was a little surprised to see Lao Duan like this. Are you so confident? Maybe they are just laughing at you.

But the facts immediately told him what an old acquaintance meant.

Gao Zhendong nodded: "Well, I have a suggestion, use petroleum coke. In fact, for your land, petroleum coke is much easier to produce than asphalt coke, right? Haha."

At this point, he laughed again because he could guess what Duan Gong would probably answer.

(End of this chapter)