Titanium alloy is a new important structural material used in the aerospace industry, with specific gravity, strength and service temperature between aluminum and steel, but high specific strength and excellent seawater corrosion resistance and ultra-low temperature performance. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

In 1950, titanium alloy was first used in the United States as a non-load-bearing component such as rear fuselage heat shield, air deflector, and tail cover on the F-84 fighter-bomber. Since the 60s, the use of titanium alloy has been moved from the rear fuselage to the middle fuselage, and some important load-bearing components such as partition frames, beams, and flap slides have been made instead of structural steel. The amount of titanium alloy in military aircraft has increased rapidly, reaching 20%~25% of the weight of aircraft structure.

Since the 70s, titanium alloy civil aircraft began to use a large number of titanium alloys, such as the Boeing 747 passenger aircraft with a titanium amount of more than 3640 kilograms. Titanium for aircraft with a Mach number of less than 2.5 is mainly used to replace steel in order to reduce the weight of the structure. Another example, the American SR-71 high-altitude and high-speed reconnaissance aircraft (flying Mach number of 3, flight altitude of 26,212 meters), titanium accounts for 93% of the structural weight of the aircraft, known as the "all-titanium" aircraft.

When the thrust-to-weight ratio of the aero engine is increased from 4~6 to 8~10, and the outlet temperature of the compressor is increased from 200~300 °C to 500~600 °C, the low-pressure compressor disc and blades originally made of aluminum must be changed to titanium alloy, or the high-pressure compressor disc and blade made of titanium alloy instead of stainless steel must be used to reduce the weight of the structure.

The above aero engine is made of high-temperature titanium alloy.

If the aero engine is the crown jewel in the manufacturing industry, then the high-temperature titanium alloy is the brightest light in the pearl.

Improving the thrust-to-weight ratio of aero engines is of great significance for the speed and flexibility of aircraft, and reducing weight is the most important way to improve the thrust-to-weight ratio of aero engines, which not only depends on the aerodynamic design and structural design of cash, but also relies on a large number of new materials to support.

"Now there is not enough time, only measured at 550 °C, the yield strength is 165σb/mpa, the elongation is as high as 45.81%, it should be a good high-temperature titanium alloy, but the use temperature should be about 350 °C, from the international top level of 600 °C use temperature is still a relatively large gap. Sun Dan said with some regret.

The most important performance index of high-temperature titanium alloy is the continuous effectiveness at high temperature, which can be used for 1,000 hours at 350 °C, and the use temperature is 350 degrees Celsius, and it can be used for 1,000 hours at 600 °C, and the use temperature is 600 degrees Celsius.

Hearing this, Tian Jitong's face became more and more ugly, and finally he couldn't bear it anymore, turned his head and left, if he continued to blow like this, he would have to go crazy.

Seeing Tian Jitong leaving, Chu Hao pursed his lips disdainfully, and then said to Sun Dan: "It's good to be able to make it for the first time, at least it shows that my research direction is correct, there are so many groups here, maybe there can be a better one." ”

Hearing this, Sun Dan said with a smile: "Then you are too greedy." ”

It's good to be able to make a kind that is quite acceptable, indeed, as Chu Hao said, at least it can prove that his research direction is right, as for wanting to improve, these forty or fifty groups of materials, thrown in, really can't even see a splash.

Chu Hao smiled, "Let's go, senior sister, I'm hungry." ”

"Okay, but I've changed my mind, you're in for a treat, it's a pity not to slaughter such a big sum. ”

"Okay, okay, I'll ask you to eat Dongpo elbow. ”

With that, the two left the lab smiling.

After a full meal, Chu Hao returned to the laboratory, as for Sun Dan, he persuaded him to leave, and as for the offer to help Chu Hao continue to test the performance, Chu Hao also politely refused.

What are you kidding, these are all in Chu Hao's control, whatever steel you want to make, you can produce any steel, the high-temperature titanium alloy with a 350°C service temperature just now is purely to not make Sun Dan and them too surprised.

Chu Hao's real goal is to make a high-temperature titanium alloy with a service temperature of 600 °C, which is really valuable for production, after all, no aero engine will reduce the use temperature, the higher the heat resistance, the more fuel the aero engine will inject, and the higher the power.

And Chu Hao is going to develop, this high-temperature titanium alloy, is a high-temperature titanium alloy developed by him based on the experience of his previous life, as well as the physics (one) extracted from the system, although the various properties are comparable to the top high-temperature titanium alloys developed by other countries, but the cost is only 50% of their level.

As soon as he entered it, Chu Hao stayed in the laboratory day and night, and when he practiced in the morning, he couldn't move, he would go out, and even sleep in the laboratory at other times.

Sleeping in the laboratory, in fact, it's okay, there is heating in the laboratory, there are beds, the conditions are good, at least save money.

Don't look at Chu Hao when he took out the 10,000 yuan, he was extremely chic, but this money was all searched out of Qian Bin's house, and his own pocket money and the 16,000 yuan he got back from the Jinfeng Martial Arts Pavilion had already been spent.

The meal was brought to him by Sun Dan from the cafeteria, seeing Chu Hao like this, Sun Dan knew what a scientific research madman was, and he secretly admired it in his heart, it was not unreasonable for Chu Hao to make results at such a young age.

What is strange is that Tian Jitong has not come in the past few days, and even other experimenters have not come.

But that's fine, at least it's very clean, and no one bothers you.

Four days later, with the final finished product, Chu Hao explained to Sun Dan and asked her not to tell her mother, although she was a little entangled, but after thinking about it, Sun Dan readily agreed.

Immediately afterwards, Chu Hao got on the train and returned to Luozhou City.

As soon as he got home, Chu Hao lay directly on the bed, not wanting to move, sure enough, the golden nest and the silver nest were not as good as his own grass nest, plus the place in the laboratory, it was not as good as the grass nest.

After resting for a while, Chu Hao got up again, biting the pen and writing his paper on the paper.

He is not ready to publish his latest research results, he is not yet in domestic journals, and foreign journals such as science, nature, and nature (materials) have impact factors of 20 to 30.

He is not famous at all, people don't look down on him, and they won't think that his scientific research results are real, although science is based on facts, but if you want to publish papers, you still attach great importance to past achievements, and he will naturally not rub his cold ass with a hot face. In the future, he will naturally not rub his cold ass with a hot face