There is a lot of liveliness around.

Some cheers of joy came into the old professor's ears, but he seemed unaffected, and there was no slight look on his face.

Seeing many people like this, he had to remind him: "It's still early to succeed. Although there are no cracks on the surface, whether there are cracks in the weld, whether they are welded through, and whether there are other problems. Everything is still unknown."

Hearing this, the scene became quiet again.

The old professor asked: "Director Chen, you should have a special testing laboratory. You need to test this test piece now."

Chen Shaohua hurriedly said: "Yes, we have a professional testing laboratory."

Welding accounts for a large proportion of ship construction. As a military shipbuilding enterprise with a century-old history, the Donghai Shipyard does have such a laboratory.

The next thing to do is to detect the test piece, the most important of which is the detection of mechanical properties, such as whether the tensile resistance meets the requirements.

The group left the sectional welding workshop and went to the welding inspection laboratory together. More people stayed here, waiting for news.

It was impossible that all the people flocked to the laboratory, and only seven or eight people went, including Yang Fan, and Chen Shaohua walked in the front.

At this moment, his heart was up and down.

I hope the welding is successful, but I am afraid that the welding will fail.

Several technicians in the laboratory began to get busy. Everyone stood beside him and watched all this quietly. Some people might have started praying in their hearts.

Never have any problems.

Must succeed!

"Bang!!!"

A loud bang made many people tremble. This was the tensile test of the test piece. The two steel plates welded together must meet the mechanical properties requirements and meet certain tensile properties.

Several technicians shook their heads gently, but the test piece did not meet the requirements.

Even if the result was not announced, many people already knew it, and their expressions became dim, especially Chen Shaohua, who was extremely disappointed.

Yang Fan noticed Chen Shaohua's reaction and gently patted his shoulder to show comfort.

Yang Fan doesn't want to see such a result either.

Like Chen Shaohua, he also hopes that the welding will be successful, thoroughly and solve the welding cracks as soon as possible, and then start welding in each section as soon as possible.

Ideals are abundant and full, and reality is skinny.

The welding still failed.

The old professor also looked solemn, holding the sample that was broken into two pieces, looking at the broken weld carefully, frowned slightly, probably thinking about where the problem lies.

"You all take a look. Although there is no problem with the surface of the weld, there are still cracks inside, and this crack is still obvious."

Upon hearing this, everyone looked at it, and some people's faces looked a little ugly.

The group walked out of the laboratory dejectedly, and no one spoke. They walked in a quiet voice and walked into the segmented welding workshop again.

Here, bad people are waiting for news.

Just now, they were all talking about this welding, and they were full of hope for it. They have basically determined that this welding should be successful.

Therefore, most people are in a good mood and can see a clear relaxed look on their faces.

Seeing Chen Shaohua and his group come in, a technician excitedly greeted him, and asked loudly with hope, "Mr. Chen, what's the result?"

This also asked everyone what they thought, and everyone wanted to know what the result was.

Is it qualified or not?

Facing the inquiry, Chen Shaohua sighed softly, not knowing how to answer for a while.

Finally, everyone noticed Chen Shaohua's expression and looked at other people who came back from the laboratory. Suddenly, their hearts sank.

No need to ask, just look at the expression and the result will definitely not be ideal.

The originally joyful and relaxed atmosphere quickly dissipated, and replaced by the solemnity, depression and depression.

Facing failure is painful.

Absolutely not uncomfortable.

Seeing everyone like this, Yang Fan comforted: "Don't be disappointed, let's try again and strive for the next success."

In this way, some people will be in a better mood.

The second welding started again. Under the guidance of the old professor, Wu Mingze personally welded. This time, some welding parameters were changed.

After a while, the welding is completed.

The surface quality of the test piece is still good, and there is no defect in the naked eye. Some people were happy, but soon a basin of cold water was poured down.

The test sample was sent to the testing laboratory for inspection and found that it was still unqualified and there were still cracks. This was a big blow to everyone and his morale became low.

The whole day.

Basically, we spend the cycle of welding test pieces, testing the test pieces, changing the welding methods and parameters, welding, and testing them.

Still unsuccessful.

Chen Shaohua was in a bad mood at all, and Yang Fan was also affected. He returned to Donghai Station with a little depressed depression, lying on the bed in his dormitory, without any intention of moving, and even had no idea to go to the cafeteria to have dinner.

In history, welded cracks occurred in the construction of the first ship of the 052 ship, which lasted for a long time before it was solved. How was this problem finally solved?

Yang Fan searched the memories in his mind.

If you can remember how this problem was solved in history, then the current welding problem can be solved easily, because you can copy ready-made "homework".

Unfortunately, I haven't remembered it.

The next day, Yang Fan was still preparing to go to the Donghai Shipyard to take a look. Because the current welding crack problem is a big problem, if this problem is not solved, Yang Fan couldn't let go of his heart.

I went to the Donghai Shipyard again.

When he saw Chen Shaohua, Yang Fan was shocked. He didn't see him overnight. He seemed to have grown a lot aged a lot, his wrinkles became darker, his gray hair increased, his originally rosy face turned gray, and his spirits were much worse.

“Mr. Chen…”

I wanted to comfort me, but when I saw Chen Shaohua like this, I really didn’t know what to say.

Chen Shaohua said in a low tone: "I didn't fall asleep all night last night and I've been thinking about welding cracks."

"Director Yang, is this new steel type of our 052 ship not suitable for welding at all? It is not suitable for building ships at all."

Yang Fan was stunned.

I didn’t expect Chen Shaohua to have such suspicion. It’s so scary.

He quickly explained: "The superiority of this new steel type is unquestionable. It is very suitable for ship construction. This steel type is not only corrosion-resistant, but also has high strength. It is our best choice for building the 052 ship."

"But..." Chen Shaohua said, "but practice has proved that it is not suitable for welding at all. A steel type that cannot be welded is not suitable for construction of ship 052 at all."

Yang Fan comforted: "It can be welded, and the welding cracks we are currently encountering are only temporary. I firmly believe that we can solve this problem in the end."

After explaining and comforting Chen Shaohua, Yang Fan asked, "The experts are all back."

"Um."

Chen Shaohua said, "Some left last night, and some left this morning. They said they wanted to go back and think about it, check some information, and come over after they have a solution."

That's it.

This means that don’t expect experts to help you solve the problem in a short period of time, and the construction of the first ship of the 052 ship cannot be delayed. No wonder Chen Shaohua didn’t fall asleep all night, as if he had grown a lot aged all at once.

"Let's go, let's go to the sectional manufacturing workshop to take a look." Yang Fan suggested.

The welding problem is not solved, segmented manufacturing cannot be carried out, and a lot of work has also stopped. Chen Shaohua currently has not much work on hand, and the most important thing is to solve welding cracks.

He nodded and said, "Yes, let's go there and have a look."

Not long after, the two walked into the segmented manufacturing workshop.

Compared to yesterday, this place is a world of difference.

There were many people here yesterday, but today, there were a lot of people, which seemed a little quiet and a little deserted. The huge workshop was empty.

Chen Shaohua whispered: "Segmented manufacturing cannot be carried out. The workers in the workshop have no work to do. Some are resting at home, and some are smoking and chatting in the workshop lounge."

Nodding gently, Yang Fan saw Wu Mingze and his apprentice Cao Ping, who seemed to be fiddling with something.

"Let's go, let's go to Master Wu to take a look." Yang Fan waved.

Chen Shaohua and Yang Fan came to Wu Mingze.

Obviously, as the number one electric welding person at Donghai Shipyard, Wu Mingze was not discouraged at all and was not convinced at all even in the face of so many failures.

I have always had the idea that I must overcome the difficulty of welding cracks.

He and his apprentice did not weld the test piece for the time being, but instead fiddled with something, which was the pad for welding.

We all know that when two steel plates are put together for welding, a metal pad is usually placed underneath.

In the Donghai Shipyard, in the welding process, welding pads are generally placed on the back of the two steel plates to ensure that the welding is in place and the welds are flat.

The welding of the specimen was not included in this test piece, and there was also a metal padding.

Chen Shaohua asked in confusion: "Old Wu, what are you doing with this thing? It's just a welding pad. What's there to do with it?"
To be continued...