The titanium alloy compressor casing of this turbofan engine is a complex thin-walled titanium alloy integral casing, which is extremely technically difficult, no wonder Li Tianfeng attaches so much importance to it.

The precision casting technology of the titanium alloy casing of advanced aero engines has always been a difficult bone to gnaw, not a simple color, extremely demanding and difficult, so Li Tianfeng specially reminded.

Titanium alloy precision casting is a high-tech product that integrates metal materials, chemical ceramics, vacuum metallurgy, high-precision processing and testing technology, high-resolution nondestructive testing technology, computer-aided design and manufacturing technology and numerical simulation technology.

At present, only a few countries in the world have mastered this technology. The special-shaped thin-walled titanium alloy precision casting technology represents the high difficulty and high level of titanium alloy precision casting technology.

The casting of this titanium alloy compressor casing belongs to the special-shaped thin-walled titanium alloy precision casting technology.

In the titanium alloy precision casting technology, numerical simulation technology is particularly important, and there is no doubt that Tianfeng Technology Company has done a good job in this regard.

The precision casting of the titanium alloy casing of the turboshaft D and turboshaft E engines adopts numerical simulation technology, which is relatively mature for Tianfeng Technology Company.

Realize the digital simulation of the whole process of R&D and manufacturing of titanium alloy castings. Replacing multiple rounds of iterative trial production through computer digital simulation can greatly shorten the R&D cycle, reduce material consumption, reduce R&D costs, and improve product quality and reliability.

As the leader of Tianfeng Technology Company's process technology and chief technologist, Zeng Qinghai nodded and said: "Boss, for the titanium alloy casing, we have carried out several times of value simulation. There shouldn't be a big problem. ”

In Li Tianfeng's view, there is no big problem with the casting process specification prepared by the casting workshop, so Li Tianfeng waved his hand and said: "Yes, then we will start to work on the precision casting of the titanium alloy casing, if there is any problem in the casting process." Combined with the actual situation, the casting process is optimized and improved. ”

Zeng Qinghai nodded and said, "Boss, I think the first batch of casting can also be carried out." ”

Li Tianfeng said: "Then it's decided." ”

The specific casting matters do not need to be arranged by Li Tianfeng personally, the foundry workshop will arrange it by itself, and there will be a special competent casting process technician to follow up.

After deciding to start the first batch of casting, it was still early to take a look, and I was going to go to the metallographic analysis room in the afternoon, but now. Li Tianfeng decided to take a look at the metallographic inspection of the fan blades.

So, Li Tianfeng said: "Qinghai, come with me to the metallographic analysis room." ”

Zeng Qinghai nodded and said: "Boss, at this time, the metallographic inspection of our fan blades should also have a result, but I don't know, whether the result is good or bad." ”

Li Tianfeng also said: "This is our first batch of fan blades, and it is also the first time that the superplastic molding and joining process has been adopted. Whether it can meet our requirements is really hard to say. ”

The two of them said. As one side exits the foundry, we walk towards the metallographic analysis room in the Materials Engineering Center.

This is a large, high-standard construction analysis room, a bit similar to a modern large-scale real yàn room, a variety of advanced instruments and equipment, but also a dust-free analysis room.

at the door. The two of them changed into clean cotton slippers and clean white coats, and walked into the analysis room, which has constant temperature and humidity all year round. During the entry, I felt very comfortable, but Li Tianfeng didn't pay attention to these now, Li Tianfeng paid attention to the situation of the fan blades.

Seeing Li Tianfeng and Zeng Qinghai coming in, Director Yang of the metallographic analysis room immediately walked over, and said with a solemn face: "Mr. Li, Mr. Zeng, the inspection results have just come out, the situation is not very good, and there is a little flaw. ”

After receiving the inspection report, Li Tianfeng hurriedly read it, "Mr. Zeng, there is still no problem with the metallographic structure of the fan blades, and the material properties are qualified. ”

Zeng Qinghai took the report and looked at it carefully, the report not only has a number of jù, but also a few high-powered microscopic pictures of the defective parts, on which the metallographic structure of the defect and the welding joint surface is clear.

The magnification of the picture is also from 500 times, 1000 times, 2000 times to 5000 times, the metallographic structure, metal grains, etc. can be seen clearly, and the defects can be seen clearly.

Zeng Qinghai said: "Boss, the welding joint surface is not perfect, and there are some defects. ”

Li Tianfeng nodded and said: "Fortunately, the defects are not strict, which shows that our process method is very correct, but the process parameters are a little unreasonable." ”

Zeng Qinghai also agrees with this, there is definitely no problem with the process method, there is a small flaw in the process parameters, which needs to be improved, and then in accordance with the improved and improved process parameters, a few more fan blades will be trial-produced.

After all, the molding and joining process of fan blades belongs to a very cutting-edge process technology, and such a high-level process technology can rarely succeed at one time, and Li Tianfeng has long been prepared for failure in his heart.

Fortunately, the defect is not strict, and it is flawed.

…………

Helicopter manufacturing plant.

In the huge assembly workshop, one by one Wuzhi Ten is being assembled, and the scene is spectacular. With Wu Zhishi's excellent performance, the military is also in urgent need of this excellent helicopter, and the helicopter factory is working at full speed to produce it.

With excellent armed helicopters, the new military transport helicopter project has also accelerated the progress, with the Z-9 transport helicopter as a platform, and combined with the experience of foreign advanced transport helicopters, the progress of this transport helicopter is also relatively fast.

Not only has the design been completed and the design type certificate has been obtained, but the first prototype has been in the series of verification test flights, and in the final assembly workshop, two transport helicopters are undergoing final assembly.

Li Tianfeng was invited to the Dao Helicopter Factory, and this new type of transport helicopter is powered by two turboshaft E engines developed by Tianfeng Technology Company.

Li Tianfeng walked to the side of the transport helicopter, looked at it, and said to the deputy general manager of the helicopter manufacturing plant who accompanied him: "Mr. Yu, the helicopter is good." ”

Mr. Yu said: "The main thing is that the design is good, I heard that the design of this helicopter was originally designed, and Mr. Li also participated in the design work, is it true?" ”

Li Tianfeng smiled: "No, I just put forward a little opinion on the design, and I was fortunate to be adopted by the helicopter design institute." ”

Mr. Yu said: "Mr. Li, you are too modest, our Wuzhi 10 was improved and upgraded according to the plan you proposed, and now the Wuzhi 10 is simply reborn, and the performance has jumped exponentially, becoming one of the most advanced armed helicopters in the world in one fell swoop." ”

Li Tianfeng looked at the row of Wuzhi Shi who was being assembled in the distance with satisfaction, and nodded, in Li Tianfeng's opinion, Wu Zhishi was really good, and he was also very satisfied with his original upgrade and improvement plan.

Li Tianfeng said: "Transport helicopters, without complex fire control systems and weapon systems, relatively speaking, are relatively simple, even if we do not mention that little opinion, our comrades in the design institute will definitely be able to complete the design work excellently." ”

Mr. Yu said: "Mr. Li, you are so modest, the design difficulty of the transport helicopter is smaller, this is for sure, but the premise must have excellent power, and your turboshaft E engine has excellent performance and strong power, otherwise, where can you design such a good transport helicopter." ”

In Li Tianfeng's view, this new military transport helicopter is a medium-sized transport helicopter, with good performance and design, and it is absolutely the most advanced in China, and it can barely rank among the first-class military transport helicopters in the world.

If Li Tianfeng presided over the design, he would definitely be able to design better, but the design work was completed by the helicopter design institute, and Li Tianfeng could only put forward some opinions.

The final assembly of a transport helicopter is almost complete, and Vice President Yu invited: "Mr. Li, board the plane and take a look." ”

Li Tianfeng was also interested, boarded the helicopter, first looked at the transport cabin, then entered the cockpit, and sat in the pilot seat with great interest.

This transport helicopter, the pilot and co-pilot positions are positioned side by side in parallel, unlike the front and rear layout of Wuzhi Shi, the cockpit of the transport helicopter is designed well, relatively spacious, and the operability is also better.

"Mr. Li, I heard that your turboshaft E engine has been exported, and Brazil's Amazon Aviation Industries Company has ordered hundreds of units from you, you are really amazing."

Li Tianfeng smiled happily: "Mr. Yu, you know all about this matter." ”

Vice President Yu said: "This matter has been passed on as a beautiful talk in the industry, many aviation people have worked hard for a lifetime and have not done anything, Mr. Li, you have actually done it, I really admire you." ”

Hearing this, Li Tianfeng was very happy, and he also knew that he had indeed done a very proud thing, the domestic aero engine industry has a big gap compared with first-class countries, not to mention a large number of aero engine exports, every year, we have to import a lot of aero engines from abroad.

In recent years, whenever a new domestic aircraft makes its first flight, netizens are often most concerned about not the performance of the aircraft, but whether the aircraft uses a domestic engine. For now, the answer is often disappointing.

Domestic aero engines are not good, this is everyone's consistent view, and Tianfeng Technology Company has sprung up, which is eye-catching.

Export 800 turboshaft E engines, bull gas! Bullish!

…………

Today's two more, the code is finished and then said, the first more is sent!

There are too many things to do at work today, so I can only watch two shifts, sorry. (To be continued......)