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In my memory, the first ship of the 052 ship seemed to have encountered welding cracks at the beginning of its construction, and this problem was solved for a long time.

As for how it solved it, I couldn't remember it for a while.

Because Yang Fan did not participate in the design of the 052 ship, nor did he participate in the construction of the 052 ship, before his rebirth, Yang Fan participated in the design of the 055 Drive and also participated in the design of the Republic's first aircraft carrier.

For the 052 ship, I just know some things from some information and from the old seniors, how to solve the problem of welding cracks in the end, I really don’t know yet.

The 052 ship uses new steel types.

The application research time for this new steel grade was too short, and in less than two years, many people were unsure of what problems would arise in the future.

Now, the first problem arises, that is, welding cracks.

After thinking about it for a long time, I still haven't remembered how the welding crack was finally solved. So Yang Fan no longer thought about this.

I will go to the Donghai Shipyard tomorrow to take a look.

The next day.

Chen Shaohua arrived as promised and came to pick up Yang Fan in person. The two of them took the black car out of the Donghai Station and headed towards the Donghai Shipyard.

Chen Shaohua seemed to be in a low mood and talked less, so he almost didn't speak much along the way.

When they arrived at the Donghai Shipyard, the two went directly to the sectional manufacturing workshop. As soon as they came in, Yang Fan was slightly shocked and said in his heart, there were so many people.

There were indeed many people around there.

In addition to a small number of workers watching the fun, they are basically welding technicians, production managers, and some leaders of all sizes.

The deputy chief construction engineer Xie Xinjian was there. So many people surrounded him, and the center of the circle was Wu Mingze, the welding king of Donghai Factory.

"Old Chen, Director Yang."

Seeing the two of them coming, Xie Xinjian took the initiative to say hello, and the onlookers also took the initiative to make way out of their positions. The two walked in.

Yang Fan was shocked again!

So many test pieces were soldered.

There are not a hundred, at least dozens. There are so many specimens piled together, and the larger ones are very attractive to Yang Fan's attention.

He walked over and picked up one of the test pieces. Yang Fan looked at it carefully, then sighed softly. There were microcracks on the welds on the test pieces, just like the test pieces Chen Shaohua had shown him.

Chen Shaohua asked, "Why are you welding the test piece again? Have you found the problem?"

Minister of Engineering and Technology Zheng Xianxue shook his head bitterly, "I still haven't found the problem. Our Engineering and Technology Department has formulated several welding methods. Let Master Wu give it a try and verify it."

It turns out that the problem has not been solved.

Chen Shaohua was disappointed.

After a while, Wu Mingze finished welding another test piece. He looked frustrated and shook his head helplessly, "There are still welding cracks."

Hearing this situation, the atmosphere at the scene became low.

Even Yang Fan felt that solemnity and felt very depressed.

Wu Mingze reminded: "Based on my years of welding experience, the problem is not the welding rod or welding wire. As for what went wrong, I was also very puzzled."

After watching for a while.

A truck drove in through the gate and stopped not far away. It was the ingredients storage area of ​​the sectional manufacturing workshop. The material preparation workshop was cut and opened, and the steel plates that reached the welded state were transported over and were usually stacked there.

There, the stacked steel plates have gradually increased.

If there is no problem with welding, after these steel plates are sent over, they will definitely be distributed immediately and some segmented welding will begin.

But what about now?

All that remains is heavy.

Seeing another batch of steel plates that were in the welded state being sent over, some people sighed softly, and the director of the segmented manufacturing workshop showed an anxious look on his face.

It's so anxious.

The steel plate is already available, but it is not allowed to move and cannot be welded.

Chen Shaohua looked at the batch of steel plates transported here, and probably felt uncomfortable. He decided in a low tone: "I won't weld the test piece for the time being. The Engineering and Technology Department will take the lead. I will hold another meeting to discuss it, and I will also participate."

So, not long after, the Donghai Shipyard held another technical meeting to discuss the issue of welding cracks. Yang Fan also sat in the conference room at Chen Shaohua's request and listened to the meeting throughout.

This is the real "listening", and Yang Fan rarely speaks.

During the meeting, Chen Shaohua said, Director Yang, do you have any good suggestions and opinions on welding cracks?

Yang Fan smiled and replied modestly that in this regard, he could only be considered an outsider and had not found any problem for the time being.

Yang Fan is not a god or omnipotent. He only sees a lot about welding and has a certain understanding of it. His professional knowledge may not be as good as that of some technicians at the Donghai Factory.

This is really humble.

Seeing Yang Fan say this, Chen Shaohua didn't force himself, but there seemed to be a little disappointed in his eyes. He probably held some hope.

He believes that Yang Fan is so powerful that he has helped the Donghai Shipyard solve so many problems before, and perhaps there are solutions to the welding cracks.

But this time, Yang Fan really didn't.

Feeling Chen Shaohua's eyes, Yang Fan could only smile apologetically and said in his heart, Mr. Chen, I really have no choice.

The meeting lasted for more than an hour.

After the meeting, the technical system of the Donghai Shipyard took action again and began various attempts, using different welding parameters and different welding methods to conduct experiments one by one.

There is only this method, and everyone hopes that this method can work.

As long as a certain welding method is used, or a certain welding parameter does not show welding cracks, it will be successful. The following welding of this steel will all use this welding parameter or welding method.

In the afternoon, Yang Fan returned to the East China Sea Institute.

In the next two or three days, Yang Fan did not go to the Donghai Shipyard again. On the one hand, he could not solve the problem even if he went there. On the other hand, he had some things at hand that he could not be separated for the time being.

Until Pan Jinfu found Yang Fan.

"Xiao Yang, the welding cracks in Donghai Factory have reached the top level. The above are very concerned. Several authoritative experts in welding have been mobilized to arrive at Donghai Factory. The meeting held in the afternoon to focus on discussing welding cracks and represent our participation."

"Okay." Yang Fan nodded.

Pan Jinfu specifically reminded: "Welding cracks are a subversive problem. There is no possibility of giving in. You must know this."

"I know, it will not be a sign on behalf of the design unit to give in to welding cracks." Yang Fan replied.

.........

In the afternoon, a special meeting was held at the Donghai Factory.

In addition to the people from the Donghai Factory, there were also two welding experts invited, as well as military personnel, military industry bureau personnel, and 052 ship general command headquarters.

Yang Fan attended the meeting on behalf of the Donghai Ship Design Institute, the design unit.

The meeting was very intense and lasted for a full afternoon.

Dinner was eaten at the Donghai Shipyard. After dinner, it was opened until after 10 o'clock in the evening. After the meeting, everyone stayed in the guesthouse of the Donghai Shipyard.

Yang Fan didn't go back either.

It was decided at the meeting that everyone would go to the production site tomorrow morning and try several welding methods formulated by experts.

The next day, early in the morning.

Yang Fan got up and finished breakfast with everyone at the guesthouse and went to the sectional welding workshop. Let’s try the welding methods that will be braked on.

When everyone arrived at the welding site, Wu Mingze came earlier. He was ready for welding. He knew that a welding expert had been invited from outside. He had confidence and was eager to try.

One of the experts is gray-haired, nearly seventy years old, wearing reading glasses. He is a professor and doctoral supervisor at a certain university, and was specially invited.

He personally directed Wu Mingze.

Under the guidance of this expert, Wu Mingze began to try a brand new welding method, and seemed very careful and did not dare to be careless at all.

The surroundings suddenly became quiet.

There was only the "sizzling" welding sound, and no one dared to make loud noises. Almost all of them held their breath, as if they would accidentally affect Wu Mingze's welding.

The test piece was not big and the weld was not long. In addition, Wu Mingze's skill was excellent, so it was finished without long. The old professor looked at the weld and nodded with satisfaction.

The welds are very beautiful, very standard fish scale welding.

Of course, he knew that photobeauty was useless and must meet the performance requirements after welding, especially the mechanical properties.

"The welding is finally completed!"

"I don't know how the welding quality is."

Seeing that the welding was completed, the originally quiet scene finally became lively. Many people were full of expectations and hoped that the welding would be qualified.

Chen Shaohua also placed great hope, but was very nervous. Although his face was not revealed, his mood was visible from his secretly clenched fists.

Hope it succeeds!

Welding cracks must not appear again.

Chen Shaohua prayed in his heart and walked over. Looking at the test piece that had just been welded, the others were almost the same and surrounded them.
To be continued...