To understand Nuzama's surprise, we need to start with the technology of gas turbines.

Many people know the steam engine, which uses fuel to boil water to produce water vapor, and then uses water vapor to push the piston to work, converting heat energy into mechanical energy. The principle of the steam turbine is to turn the piston in the steam engine into a group of impellers, and the high-temperature and high-pressure steam passes through the impeller, which will make the impeller rotate, which can also generate mechanical energy and drive the generator to generate electricity.

The biggest disadvantage of steam engines and steam turbines is that the process of heating water with fuel causes a certain amount of energy loss, which reduces the thermal efficiency of the equipment. If the process of boiling water is omitted, but the impeller is directly driven by high-temperature and high-pressure gas, the thermal efficiency of the whole equipment can be effectively improved, so as to meet the requirements of energy saving, economy and environmental protection. This kind of equipment that uses high-temperature and high-pressure gas to propel the impeller is called a gas turbine.

There are several other advantages that gas turbines have over steam turbines. One is that due to the elimination of the steam circulation system, the volume of the entire equipment can be made smaller, so that it can be installed on ships, aircraft and some other equipment as the main engine of the equipment. The other is that gas turbines start much faster than steam turbines because they don't have to wait for the water to boil, and are often used as emergency power.

The gas turbine also has its weakness, that is, the temperature of the gas is much higher than the temperature of the steam, which puts forward strict requirements for the material of the impeller. The temperature of water vapor is related to pressure, at normal pressure, the temperature of water vapor is only 100 degrees, even under the so-called "supercritical" conditions, water vapor is pressurized to 250 atmospheres, the temperature is about 600 degrees, such a temperature is still far lower than the melting point of ordinary metal materials, so it is OK to use ordinary metal to make impellers.

Gas turbines are different, because they do not use water vapor as the conduction medium, but directly use high-temperature gas for work, so the gas temperature in the gas turbine often reaches more than 600 degrees. Scientists have found. The higher the gas temperature in the gas turbine, the higher the thermal efficiency of the equipment, so continuously increasing the gas temperature in the gas turbine is the key to improving the performance of the gas turbine.

Since the 50s of the 20th century, gas turbine technology has gone through three stages. It can also be called the third generation of gas turbine technology. The first generation of gas turbine technology was characterized by an initial gas temperature of between 600 and 1000 degrees Celsius and a thermal efficiency of between 10 and 30 percent for simple cycles. The second generation of gas turbine technology refers to the initial temperature of the gas between 1050 and 1370 degrees Celsius, and the thermal efficiency of the simple cycle is between 32% and 40%. Around 2000, some manufacturers represented by General Motors proposed the third generation of gas turbine technology, and the initial temperature of gas can reach between 1400 and 1500 degrees. The thermal efficiency is further improved to more than 40%. What ALK recommended to Nuzama was the third-generation gas turbine technology it had developed, which had an initial gas temperature of 1,450 degrees. This does represent the world's first-class level.

There are many technical difficulties in increasing the gas temperature of gas turbines, not the least of which is the selection of blade materials. The melting point of ordinary steel is about 1500 degrees, and if you use ordinary steel to make the impellers of gas turbines, then in the gas of 1450 degrees, these impellers will be as soft as boiled noodles and will not work properly at all. So, is it possible to build a gas turbine with a higher gas temperature? A lot depends on the ability to manufacture materials that can withstand high temperatures.

The preparation of high-temperature materials needs another lengthy text to introduce, which involves powder metallurgy technology, high-pressure forging technology and so on. Modern industry can be described as interlinked. Any technological breakthrough needs the support of the entire industrial system. In the 20 years of reform and opening up, China has accumulated all aspects of technology and equipment with hard work. Now I finally have the confidence to compete with my international counterparts. Hanhua Heavy Industries has been engaged in gas turbines for eight years, and the leader is Zhang Yihua, who is engaged in aero engines. Hanhua's initial purpose in this project was to provide marine engines for naval vessels, and for this purpose, Liu Xianghai also specially introduced the famous gas turbine expert Bress from Ukraine to provide technical guidance.

Lin Zhenhua has invested a huge amount of money in the gas turbine project, and the results achieved are also very gratifying. Three years ago, Zhang Yihua came up with a 300,000-kilowatt gas turbine for ships, which was accepted by the Navy and applied to a new type of domestically produced destroyer. Last year, the ship's 600,000-kilowatt gas turbine was also successfully commissioned, and is now being prepared to be applied to the 50,000-ton conventionally powered aircraft carrier that Liu Xianghai is building.

While developing marine gas turbines, the team led by Zhang Yihua has also developed various gas turbine products for ethylene compressors, central air conditioning and power plants, and its performance indicators have reached the international first-class level. This time, Lin Zhenhua came to the Frankfurt Equipment Exhibition, and the gas turbine was one of the products he planned to focus on. It is precisely because of this confidence that he has no timidity towards Nuzama's arrogance.

"Mr. Nuzama, please don't look at Chinese products with old eyes. There is an old Chinese saying that the back waves of the Yangtze River push the front waves. It is true that Western companies such as ALK were once ahead of us in technology, but after more than a decade, can't we catch up? Lin Zhenhua said to Nuzama.

Nuzama shook his head in disbelief and said, "I'm sorry, Mr. Lin, I'm not convinced by your point of view. What reason do you have to convince me that your technology can surpass ALK? Know that as you move forward, they are also moving forward. ”

Lin Zhenhua said: "I only need to give an example, and you will understand. At present, the world's largest 80,000-ton die forging machine is in China, and it is in our Hanhua Heavy Industry Group. As for ALK, it doesn't even have a 30,000-ton die forging machine, and its powder metallurgy impeller has to be shipped to the United States for processing. In fact, we are moving forward, and they are still standing still. ”

"It's ......," Nuzama was speechless.

Nuzama was able to become the deputy minister of industry in Goma, and naturally he had a few brushes. He knows that the mainstream technology for manufacturing high-temperature materials today is powder metallurgy technology, and an important step in the powder metallurgy process is high-pressure die forging, which requires metal powder to be forged and formed under tens of thousands of tons of die forging machines. The pressure of the die forging machine directly affects the level of powder metallurgy technology, and as Lin Zhenhua said, ALK does not have its own large-scale die forging machine, and many of its powder metallurgy parts need to be shipped to the United States and used the 45,000-ton die forging machine in the United States to forge.

Due to the lack of its own large-scale die forging machine, it is difficult for ALK to make technological breakthroughs in powder metallurgy, and the third-generation gas turbine it manufactures, the blade material uses the technology patent of General Motors of the United States, which is one of ALK's technical bottlenecks.

A few years ago, Hanhua Heavy Industries built the world's first 80,000-ton die forging machine, with this die forging machine, Hanhua's technicians can carry out experiments on powder metallurgy materials as they like, which makes Hanhua's powder metallurgy materials research a blowout breakthrough. Lin Zhenhua's younger sister, Lin Fanghua, is now the director of the materials laboratory of the Department of Mechanical Engineering of Huaqing University, a well-known materials scientist in the world, and many of her experiments are done with the help of Hanhua's 80,000-ton die forging machine, which is a condition that her international peers cannot obtain.

The difference between scientific research and metaphysics is that scientific research actually has rules to follow. You just have to do what you have to do, and you're going to get results. The difference between a strong country and a weak country in science and technology lies in the different conditions of each. In the past, the experimental conditions of China's universities and research institutes were far inferior to those of Western countries, and the scientific research funding was pitiful. The situation is very different today, with China's national strength increasing and its investment in scientific research increasing. Many experimental conditions that exist abroad have also been equipped in China. Even some experimental conditions that cannot be reached abroad can be provided in China. In addition, there are sufficient scientific research funds to pour in, and various achievements have naturally sprung up.

Seeing that Nuzama was silent, Lin Zhenhua no longer forced him. He took out a set of information, handed it to Nuzama, and said: "Okay, this is the technical information of the gas turbine provided by Hanhua Heavy Industries, as well as the information of the generator set of Xingbei Heavy Machinery, Mr. Nuzama can take it to study it again, if you are interested in comparing these materials with ALK's products, we have no objection." ”

"Thank you, Mr. Lin." Nuzama took the information and walked out of the negotiation room with Murabi with an embarrassed face. He could faintly feel that what Lin Zhenhua said to him should be true and reliable. If Hanhua's products can indeed reach the technical level of ALK, and the price is as cheap as ever, then he really has no reason to refuse.

After Nuzama and his party left, he said to Lin Zhenhua apologetically: "Mr. Lin, I really didn't expect it to be like this. Nuzama, who went to university in France and returned to China to engage in politics, has always been funded by Western conglomerates, so his idea is ......"

"Harore, whatever the result, I thank you very much." Lin Zhenhua interrupted Harore's words and said, "You are our good friend, as for Nuzama, everyone has their own ambitions, and we don't force him to do anything." I believe that we can convince him with excellent technology. ”

"Mr. Lin, I remember when I first met you at the Frankfurt fair, all you were able to show was some outdated equipment. Of course, those equipment still played a big role in the industrialization of our Uzan country. It's a big deal that you've been able to exhibit so many world-class products today. I am fully convinced that in a few years' time, you will be the most competitive exhibitor at the Frankfurt Fair, and that day will not be far off. ”