The pressurized cabin actually had such a big military use, and after Long Yaohua was repeatedly confirmed, he did not stop Liu Yijiu from conducting such a test the next day.

The only inconvenience is that the person who enters it needs to wear a breathing mask, otherwise, it will be suffocated due to lack of oxygen, and the pressurized chamber is full of argon with a high concentration, otherwise there is no need to wear a breathing mask or something.

"Is there really nothing?" Early the next morning, Long Yaohua asked Liu Yijiu again with bloodshot eyes.

"Chief, don't worry, if there is any problem, you can completely depressurize the pressurized chamber outside, after all, there are only two atmospheres, and there will be no major problems." Liu Yijiu knew that Long Yaohua was out of concern for himself, so he didn't say anything.

The explanation, has been explained.

Only by proving that there are no problems in it will it be possible for the state to intensify research on pressurized chambers, and at the same time to begin research on the training of soldiers.

When Liu Yijiu arrived at the welding experimental workshop where the pressurized cabin was located, the people of Factory 132 had arrived here, and a group of people were discussing, and when they saw Liu Yijiu coming, many people had a look of ridicule on their faces.

These leaders are used to being pampered, especially yesterday when Zhao Liangbi didn't say anything about their behavior, so everyone naturally won't have any reservations.

The mocking smile, the contemptuous eyes, and the mentality of watching the show were all revealed by them.

Even the five female welders who fainted inside yesterday appeared in the crowd with pale faces.

They were eliminated, but they would not be reconciled. It depends on how long Liu Yijiu can stay in it without wearing protective clothing at all.

Skilled workers are like that, conquering them only in terms of technology, and what they are asked to do. They will obey completely.

Otherwise, it's really not easy to manage.

"You are all good welders, today we changed the way and welded inside!" Liu Yijiu didn't care about everyone's discussions, nor did he care about everyone's complicated expressions, but directly announced the selection criteria for these male welders.

Without the slightest training, homework is carried out inside. It's a bit unexpected.

"Director Liu, are you welding some scrapped parts, or?" Huang Qiaosong also didn't expect it. That's not what Liu Yijiu said at first.

Liu Yijiu glanced at Huang Qiaosong, then looked at the others, and said calmly, "Weld the parts of the engine!" We don't have any more time to waste. This thing. I personally supervise, if they can't do it, they will be replaced, and the welders in the Ninth Courtyard are also capable of such work! ”

"Who's to say no? I'll go with you! Huang Ying, whose face was still pale, was very disdainful of Liu Yijiu.

Although he was on the verge of a coma yesterday afternoon, he came out with a collapse, and after the infusion, he rested for the night. She is still weak, but she is unwilling to be eliminated like this.

"You can't. Let's talk about it when you're rested! Liu Yijiu shook his head, it was impossible to let Huang Ying go in to work.

"You, who's coming?" Liu Yijiu turned his head to the crowd of workers and asked.

"Me!"

"Me!"

"Me!"

……

After a series of answers, the remaining 14 male welders stood up, they were not for the assessment, because they had already given up, as long as Liu Yijiu could stay in there for a few hours, they would be convinced.

Sometimes, the performance of the leader has a very important role for the whole unit.

"The best technology comes out." Liu Yijiu didn't say anything, but directly let them come out by themselves, "This time, we will directly use welding for selection!" You know how difficult these things are to make, and you know the value, and I hope that those who are not sure will not come in themselves. Scrapping is not a problem, but it will affect the process of test flights of our fighters. ”

"I'm the right fit!" Huang Ying did not give in.

"Go aside! There is no time to joke now. Liu Yijiu didn't say anything about women going away now, otherwise these tigresses would have exploded.

has already aroused the excitement of the crowd, and in the end, if they add fuel to the fire, even if they can't do anything to themselves and what happened, it is not cost-effective.

After the discussion of more than a dozen welders, four welders were selected, all of whom were in their thirties, not in their forties, and belonged to the relatively young experienced welders in the middle of the selection.

Liu Yijiu didn't say anything, and asked people to push the parts to be welded to the middle of the work area with a trolley, place them on the two workbenches, and then pressurize the work area directly.

The respirator mask is no different from the hood of the protective suit, and the area of the eye mask is welded protective goggles, which is much easier than wearing bulky protective clothing.

The blades of superalloy, the impeller of superalloy, and the parts of titanium alloy are all placed next to the workbench of the pressure cabin with specially made logistics trolleys, and the blades precisely machined by the machining center sparkle under the light.

It's just that Liu Yijiu, who is wearing a breathing mask, is very conspicuous inside, because the tube used for breathing in the protective suit is connected to the outside, so when working inside, you must be careful, you can't move at will, and you can't let the high temperature generated during welding burn the tube, otherwise there will be problems.

The first batch of four welders selected entered the inside with Liu Yijiu, and the two-atmosphere pressure environment did not have much impact on Liu Yijiu, who was physically strong, but for other ordinary welders, their actions became less coordinated and natural than the outside.

The welding drawings and tooling are all on the workbench, a large impeller of an engine, after welding, it will weigh dozens of kilograms, fortunately, the workbench is the same height as the logistics trolley for transfer, and it can be gently pushed from the top of the workbench to the trolley.

After entering the inside, the four workers listened to the instructions outside, Huang Qiaosong asked them to work according to Liu Yijiu's instructions, Long Yaohua was present, and they did not show any non-stop instructions. Otherwise, it will bring a lot of trouble to Zhao Liangbi and others, and make their lives not very easy.

Liu Yijiu looked at the drawings and began to direct the workers to weld, there was no sound communication, he could only point to the drawings and the welding process regulations to the four workers. In teams of two, each began to weld an impeller, and Liu Yijiu, who was not a specialized welder, was staring at both sides.

Even if there is a special tooling to fix the position of the blades on the impeller, two people need to weld on both sides at the same time to reduce the deformation and ensure the quality of welding.

While working, these welders seemed to forget that Liu Yijiu had almost made them riot yesterday, and under Liu Yijiu's command, they began to work.

When the first bright light is lit up in the pressure chamber filled with inert gas, the bright light inside the pressure chamber starts to flicker.

When the first blade was welded, several workers didn't feel anything, although they were a little more tired than usual, but there were no problems.

But when the second blade was welded, there was a problem, and the welding had not yet begun, just positioning the blade on the tooling, which made a welder feel chest tightness and shortness of breath and difficulty breathing, Liu Yijiu immediately let him go out and change the outside people to come in.

Wait until someone from outside comes in before the welding of the second blade begins.

It is not a simple thing to weld the engine blades that do not look big, even if these blades have to be finished once, but in order to ensure the position accuracy of all the blades, they must be symmetrically welded, otherwise the angle of the blade distribution will be problematic, so that the entire impeller will be affected when rotating at high speed, thereby affecting the air pressure of the entire engine at this level, causing the internal air pressure of the engine to be disordered.

Originally, it was supposed to be sintered and then processed as a whole, but in the end it had to be welded.

In the process of China's current technical level, the engine's technology can only reach 500 hours of service life, which is half the life of Lao Maozi's AL-31.

Liu Yijiu didn't care. AL-31, an engine exported to China, is about two million dollars, even if the service life reaches 1,000 hours, not counting the cost of maintenance, just the cost of using the engine, it costs 5,000 dollars per hour......

The domestically manufactured turbofan eight, even if it is not currently manufactured in batches, is only about 6 million yuan, which is all the costs, calculated according to the production of 400 units. Based on 500 hours, the cost of use is only about $6,000.

It is much more expensive than Lao Maozi's engine, and the flight cost is much higher, but the republic itself is able to produce it!

This is something that money can't buy.

If an integral impeller or even an integral hollow impeller can be developed, the service life will be longer and the cost will be effectively reduced.

Time has been continuing, welding workers, constantly coming in and out, an impeller is completely welded, in which it takes just four hours, Liu Yijiu found that the first four people who came in, two have not been in a situation, the first person to change in, there is also no problem, as for the others, there are very few people who insist on four hours.

This gave him a bit of a headache.

A heavy J-10 fighter needs two engines, and if there is an export order for 200 aircraft, this will reach the expected output.

After solving the technical problems, it seems that the urgent need to increase production capacity will follow?

(To be continued.) )