Chapter 476: Investment Casting

Hearing this, Wang Xiaodong couldn't help but be stunned, not because he didn't want to say it, but because he felt that it was unnecessary at all.

The technical requirements of the missile body and the load-bearing components on the tank are already unattainable, but the two together cannot match the turbine blades of a jet engine.

You must know that it is a core component that needs to withstand high speed and high temperature, not to mention the current Baiyun plant, which is a first-class military industrial power like the United States and the Soviet Union, and there is no good way to do it in the field of jet engine blades.

Instead of being unrealistically ambitious, it is better to do the things in front of you in a down-to-earth manner.

Chen Yaoyang and Li Zhong are the same, they only feel that the turbine blades of the jet engine are too far away from them, and the reason why Bai Yi said this is nothing more than to motivate and motivate the technical backbone of the factory, so Chen Yaoyang hurriedly made a haha to resolve the embarrassment: "Xiao Wang, don't you hurry up and thank Bai Gong, he has high hopes for you." ”

"Yes, yes, this kind of difficult casting parts is the future development direction of our foundry." Li Zhong is also a master of fighting snakes and sticks, as soon as he heard Chen Yaoyang's words, he quickly agreed, and did not forget to put on a posture of elders promoting juniors, patted Wang Xiaodong's shoulder and said: "So, Xiao Wang, the burden of you young people will still be very heavy in the future." ”

"Why do you have to say that in the future, can't you do it now?"

Just when everyone thought that this matter was just revealed, Bai Yi shook his head, and instantly fixed Li Zhong's relieved smile on his face, which looked extremely exciting.

Chen Yaoyang's face was not very good-looking, but looking at Bai Yi's expression that was not like a joke, he could only smile bitterly in his heart, it seemed that this guy was about to start tossing again.

Only Wang Xiaodong was stunned at first, followed by his eyes full of incredulity, and finally turned into a meaningful smile, looked at Bai Yi, who was calm in front of him, took a deep breath, and chuckled: "Bai Gong, our factory can't even make the missile body and the load-bearing parts of the tank, how can we make the turbine blades of jet engines with higher requirements?"

Besides, even if we take 10,000 steps back, we can make turbine blades, and it should not be our casting workshop, but the forging workshop, because this kind of blade has always been forged by precision forging process and cast with ...... Hehe, I haven't seen anyone in the world do this. ”

Wang Xiaodong said this is full of confidence, in addition to the newborn calf is not afraid of the tiger's spirit, as the technical backbone of the foundry workshop, Wang Xiaodong has been tracking the development of various manufacturing processes, although it is not exhaustive, but the basic situation is still understood.

Because of this, when he heard Bai Yi's words, his first feeling was that Bai Yi was crazy, because jet engine turbine blades need to be forged by a high-precision precision forging machine before they can be used, and this unwritten manufacturing process has almost become an iron law for jet engine production.

Not to mention those of them who are engaged in the military industry, even those enthusiasts who are slightly interested in machining are well aware of this, which Cheng wants to be Bai Yi, who is the technical leader of Baiyun Factory, has made such a low-level mistake, which is really funny.

In fact, it's not just Wang Xiaodong, Chen Yaoyang and Li Zhong are not like this, I thought that Bai Yi could have some kind of clever arguments, but he didn't expect it to be so whimsical, that is, the two of them are sophisticated and calm, and their performance is not so obvious.

The expressions of several people changed, Bai Yi had already seen it in his eyes, and couldn't help but take a deep breath: "At present, the mainstream process of turbine blades is indeed precision forging, but do you know what the qualification rate of turbine blades manufactured by this process is?" What is the service life? ”

"This ......"

Wang Xiaodong still wanted to say something, but the words came to his mouth but he couldn't speak, although he didn't know much about the precision forging process to manufacture jet engine blades, but he also clearly knew that the qualification rate and life of turbine blades are not very high.

If nothing else, let's just say that the jet engines used in the MiG-15 are currently being fought over North Korea, and the interval between overhauls and replacement time is relatively short, and one of the important reasons is that the turbine blades are prone to cracking and cracking under high temperature and pressure.

Of course, there are material reasons for this, but there must also be corresponding problems in the manufacturing process, otherwise this situation will occur frequently.

Although he knew the problem, Wang Xiaodong's previous words were too full, and he never believed that in addition to the precision forging process, there was any process that could make more excellent turbine blades. ”

"It's not that they don't let go, it's that there is no better process to replace precision forging."

"Is that what you have?" Wang Xiaodong asked disdainfully.

"Of course!"

"What's that?"

"Investment Casting!"

Hearing this, Wang Xiaodong couldn't help frowning suspiciously, not only him, but even Chen Yaoyang and Li Zhong looked at each other, their faces full of question marks.

There is no way, the investment casting that Bai Yi said is so new to them that they have never even heard of it, let alone understand it.

However, it is unfamiliar to Wang Xiaodong and others, but it is familiar to Bai Yi, which has been applied to the manufacture of jet engine turbine blades since the mid-50s of the 20th century, with its high degree of completion, good structure and high strength, once it is used, it will immediately replace the original precision forging process and become one of the most important manufacturing processes for turbine blades.

Even with the application of multi-axis CNC machine tools leading to new innovations in the manufacture of turbine blades, the investment casting process has not withdrawn from the stage of history, and still plays an important role in the fifth generation fighter engine.

Such a wide range of applications and enduring manufacturing process is naturally a compulsory course in military equipment science, and because of this, Bai Yi is quite familiar with this process.

After all, with the in-depth study of the aero engine prototypes and drawings provided by the Soviet Union by the relevant domestic departments, the basic manufacturing process is an indispensable and important link in the future, whether it is imitation and self-development.

The turbine blade with its important role, is the core of jet engine manufacturing, in the current machine tool technology has not yet reached the numerical control, multi-axis machine tool can not be applied in the case, want to manufacture a good performance of the jet engine turbine blade, investment casting process is a practical and good way.