The relationship between the two was there, and Yang Xianfeng did not hide it, and said truthfully: "Hey, it's not this damn turboshaft C engine. After the factory inspection and test run, he found that the blades had more or less blueness every time. The factory held many fault analysis meetings, but never came up with an effective solution. △↗”

Li Tianfeng knew that the military users had great hope for the turboshaft C engine of factory E. The helicopter manufacturer went to the front of factory E. It had produced many Wuzhi Ten, but none of them had installed the engine.

There is no engine for helicopters, so there are only two ways: either continue to buy engines from high prices abroad, or continue to wait.

Buying an engine from abroad is easy to get stuck because it is a seller's market. If you want to sell it to you, you can stop selling it if you don't want to sell it to you. You can even increase the price frequently, and you don't have any way.

The military obviously knows this, and may still feel it deeply, so it is necessary to develop turbine shaft engines in China. There are so many problems with turbine shaft c now. It is conceivable how much pressure Yang Xianfeng is as the chief engineer of factory e.

After listening to Yang Xianfeng's story, Li Tianfeng said: "It seems that there are only two reasons: either the temperature in front of the turbine is too high or the material is problematic."

Yang Xianfeng said: "No, the temperature before the turbine is really a little high. After taking relevant measures, the situation is better, but some turbine blades still have blueness. After analyzing the materials, they found that there were certain problems with the materials."

Li Tianfeng said: "Mr. Yang, there is a problem with the materials, use qualified materials."

Yang Xianfeng smiled bitterly: "Tianfeng, you don't know that the domestic material industry is already relatively backward, especially the high-temperature alloy material used in the turboshaft C turbine blades. Because the smelting technology is difficult, the quality of the material has not been very stable."

The quality standards of materials are also a range, such as mechanical properties, which stipulate the scope of qualification, and the same is true for high temperature resistance. Meeting the conditions within a certain temperature range is a qualified one, because it is a range, and the quality performance of materials can be higher or lower.

Generally speaking, the quality of imported metal materials is relatively stable and has good consistency. The material properties of different batches and different furnace batches are basically the same and there will be no large fluctuations. Domestic materials are new materials, such as the high-temperature alloy material used in the turbine shaft C turbine blades, and the mass fluctuation is relatively large.

Li Tianfeng knew that this was really a difficult problem, so he said: "Mr. Yang, the surface of the blade is blue because it is formed in a high-temperature working environment. If a layer of thermal barrier coating is sprayed on the surface of the blade, it will play a good protective role. There is no need to worry about blueness on the surface of the blade again."

Yang Xianfeng said: "Tianfeng, this is a good solution. I will communicate with the design institute to see if it is feasible."

Li Tianfeng said: "Mr. Yang, you should communicate with the design institute first. If you have any questions, you can contact me. Our Tianfeng Technology's surface and heat treatment workshop has been built. We have purchased advanced plasma spraying equipment to allow plasma spraying on the surface of the blades."

Yang Xianfeng said: "Okay, then we will contact us if there is any problem."

Li Tianfeng nodded and after the call was over, Li Tianfeng thought to himself that spraying the thermal barrier coating on the turbine blades to improve the high temperature resistance of the turbine blades is a very technical matter. I wonder if the e-factory and the design institute will succeed.

The material grade of the "tfwz001" type turbine shaft engine blade is the same as the material grade of the E-factory Turbine C turbine blade. However, the blade design is inconsistent. The turbine blades of Tianfeng Technology not only have advanced blade shapes, but also adopt an ultra-cooled design. There are many cooling holes on the blades, which can be cooled during work. In addition, the blades will also be sprayed with a thermal barrier coating. The turbine blades of the same material are greatly improved with high temperature resistance.

Because the blades can withstand higher temperatures, the front-turbine temperature of the "tfwz001" type turbine shaft engine is much higher than the turbine shaft c of the factory e. The output power of the engine is closely related to the front-turbine temperature. Therefore, the output power of the "tfwz001" type turbine shaft engine can reach 1800kw, while the output power of the turbine shaft c of the factory e is only 1200kw.

After talking to Yang Xianfeng, Li Tianfeng was really worried that the e-factory may not be able to produce a qualified turbine blade thermal barrier coating.

However, Li Tianfeng will not pay too much attention to these things for the time being, but instead devotes all his energy to the development of the "tfwz001" turboshaft engine.

The three-year bet with Wang Guohong is coming to the end of the year. Li Tianfeng cannot do it without rushing it. This bet is like a tight curse. When Li Tianfeng relaxes himself, he will wake up immediately. Then he is full of fighting spirit and enthusiasm, and devotes himself to the development of this turboshaft engine.

...

"Boss, this is a list of teams to conduct environmental and safety inspections on our company in the future. There are a total of five people. The team is led by Tang Kaiyu, deputy director of the Municipal Environmental Protection Bureau, and the deputy leader is a section chief of the Safety Supervision Bureau." Liu Wei walked into Li Tianfeng's office and reported.

Li Tianfeng took the list and took a look at it impatiently: "Check it out, just check it, whatever they want."

He added: "Tomorrow, ask Cai Bin to take a few people to accompany them to check the whole time. Some key departments that need to be kept confidential should not be allowed to enter."

Liu Wei quickly understood what Li Tianfeng meant and said with a wicked smile: "Boss, this is quite wonderful. Many of our security guards are special forces. I am afraid that these people will not be able to do anything."

Li Tianfeng meant this, nodded, and then asked: "Zhang Haiping from the General Staff Equipment Department will go to Songzhou tonight and come to our Tianfeng Technology as a private person to take a look. Mr. Liu, arrange a private room at the Guobin Hotel, and I will have two drinks with him tonight."

Liu Wei said: "The car to pick up people has been sent out and will wait outside the airport. After picking up people, Director Zhang will be arranged to stay in the Guobin Hotel."

Seeing that Liu Wei's arrangement was well organized, Li Tianfeng nodded with satisfaction.

Li Tianfeng felt a bit mysterious about Zhang Haiping. So far, Li Tianfeng did not know Zhang Haiping's position and level, but only knew that he was a director of the General Staff Equipment Department.

However, judging from the aura that was faintly emitted by Zhang Haiping and his speech and behavior, I am afraid that his position is not low.

...

Guobin Hotel, lotus hall.

This private room has almost become Li Tianfeng's royal private room, and it is a banquet for some important guests. It is basically in this private room. Fatty Chen from the Guobin Hotel is also very good at taste. Under normal circumstances, this private room has always been kept for Li Tianfeng.

The guest of honor sat down. When Zhang Haiping saw such a large table of hearty dishes and two bottles of good wine, he couldn't help but say, "Mr. Li, this specification is a bit too high, and you can't do this next time."

Li Tianfeng smiled and said, "Where, where, Director Zhang is a guest from afar, we dare not be too casual."

As we exchanged greetings and joked, we gradually talked about the aircraft engine. Zhang Haiping said: "Since the last air show, I have checked a lot of information when I returned to Beijing. I found that your engine has adopted a lot of new designs. I want to come and take a look."

Li Tianfeng said: "Yes, I'll take you to our company tomorrow to have a good look, but today we have to eliminate these two bottles of wine first."

Zhang Haiping laughed heartily, and he was very generous when drinking. The wine tasted and the character of the person, Zhang Haiping would definitely not be bad. Li Tianfeng thought so.

If one-on-one, Li Tianfeng really couldn't drink Zhang Haiping, but it would be different if others helped. Sun Kang, Liu Wei and others all toasted Zhang Haiping, and in the end, Zhang Haiping was drunk.

Although Li Tianfeng was a little drunk with this wine tonight, he was very happy. Zhang Haiping was good and worthy of his fellowship.

………

I drank a lot of wine last night. Li Tianfeng came to Tianfeng Technology Company a little late. At this time, the joint inspection team had arrived at Tianfeng Technology and started the inspection.

In terms of Tianfeng Technology, a manager under Liu Wei came forward to receive and cooperate with the inspection work. Tan Yan is not only a master's degree, but also has outstanding abilities, eloquent and a bit arrogant personality. She is Liu Wei's right-hand assistant.

Of course, Cai Bin also brought four security guards over and cooperated with the inspection throughout the whole process according to Li Tianfeng's requirements. These four security guards were from special forces. When they stood there, their momentum was completely different.

Tang Kaiyu, the deputy director of the Environmental Protection Bureau who led the team, saw that the only one who received him was a general manager of Tianfeng Technology, couldn't help but look down, "Where is Li Tianfeng? Why didn't he see him?"

Tan Yan had known that this group of people came to find fault and had been prepared in her heart. Now, seeing that the other party called her boss's name and there was no sign of respect, Tan Yan was slightly angry, so Tan Yan said, "Deputy Director Tang, our Mr. Li is very busy and is receiving an important guest, so I will be responsible for you."

This is very well-informed. Although it seems neither humble nor arrogant, the voice of "Deputy Director Tang" showed his attitude, and said that Mr. Li is receiving important guests and I will receive them. That means that you, Deputy Director Tang, are nothing at all, and only managers like me can receive you. There is no need for us Mr. Li to come forward.

Tang Kaiyu was not stupid, so there was no reason that he couldn't understand. Suddenly, his whole face almost turned dark, and he thought in his heart angrily, if I didn't find a lot of problems this time, my surname would be Tang.

The rest of the inspection team thought to themselves, why is this woman so eloquent and almost doesn't even have any dirty words to curse.

………
Chapter completed!