410 blade material

Lin Zhenhua was unaware of the cold arrows that were coming at him from the shadows, and for most of the months after the battle pledge meeting, he spent most of his time at the Hanhua Institute of Technology and Information at the foot of Xiangshan, discussing one technical problem after another with the thousands of technicians gathered here.

After the consultation of the technical authorities from various enterprises, the large ethylene research project team screened out a total of hundreds of technical problems that need to be solved. The members of these research groups come from hundreds of enterprises in the fields of petrochemical equipment, metallurgy, machinery, electronics, as well as major universities and scientific research institutes, including both old engineers who are getting older and younger, as well as young graduate students. In order to integrate the research results with the manufacturing process more quickly, the research team also recruited a large number of excellent technicians.

Although each franchise enterprise more or less brought some of its own ideas during the negotiation, it also showed the quality that a large state-owned enterprise should have after finally signing a contract to enter the alliance. The technicians involved in the technical research can be said to have unique skills, and they also have a good eye for their work. Many research groups are made up of a mix of technical staff from multiple companies and universities, but they are often able to adapt quickly to each other and form a well-coordinated team.

Hanhua is the leading unit and has sent the most technical personnel. A few years ago, Lin Zhenhua began to lay out the research of large ethylene, and in the past few years, Hanhua Yijing has formed a lot of research results. Nowadays, each research team is based on the technology accumulation of Hanhua Heavy Industries to carry out follow-up research, and the progress is very rapid.

A large number of technical materials from the Soviet Union also played an important role, and in the eyes of all technicians, those tons of data were simply an inexhaustible mine. Many of the technical problems that have plagued them for many years can be answered in this pile of old papers. When they saw these materials, the leaders of various enterprises were convinced, and felt that Hanhua Heavy Industry still had its strength as the "leader of the Five Peaks".

A large number of experiments were also carried out in parallel. He Haifeng personally negotiated with the Petroleum Corporation and the Jiangsu Provincial Economic Commission, and prepaid 200 million yuan of research funds to the project team through bank loans to support various technical experiments. For example, to fit the fracture toughness curve of a material, it may be necessary to test hundreds of specimens, and the cost of each specimen is as high as thousands of dollars.

Lin Zhenhua is very busy every day, and his main responsibility is to participate in the discussions of each group, understand the difficulties faced by each group, and then coordinate resources to solve these difficulties. In this regard, Xiang Zhe could not help him, because Xiang Zhe was a liberal arts student, and he could barely understand a little about general production problems, and when it came to the research of such cutting-edge technology, he did not know anything. Lin Zhenhua is different, his professional background in his previous life was very profound, and now participating in such technical research, although he can't understand everything like experts, but he can still do it if he understands what others say.

"The choice of low-pressure blade material is the biggest difficulty we faced." In the office of the industrial steam turbine research group, materials expert An Zixuan is introducing the progress of the project to Lin Zhenhua, "The application of low-pressure blades in the wet steam zone of the steam turbine requires good corrosion ability, in addition, it also needs to have appropriate tensile yield strength to withstand stable centrifugal stress and bending stress. Traditionally, the material of this kind of blade is 12Cr stainless steel, but Zhang Gong and they proposed that the vibration damping performance of this kind of steel in China has not reached the level of their Xiwang. ”

"Zhang Gong has a problem for Professor An again? What is the vibration damping performance that you proposed? Lin Zhenhua smiled and asked Zhang Yihua, an engine expert sitting on the side.

Zhang Yihua was born in aero engines, and now under Lin Zhenhua's yin*, Yijing has turned all his energy to industrial steam turbines. However, according to him, aero engines and industrial steam turbines have something in common, and some of the gas turbines, which are close relatives of steam turbines, are modified from aero engines. China has also engaged in the research of aero engine transformation of marine gas turbines, and Zhang Yihua himself has personally participated in it. Hearing Lin Zhenhua's question, Zhang Yihua replied: "The type of steam turbine we are currently designing, including 20-level blades, has a large size of the blades, and is prone to resonance when rotating at high speed. Blade vibration accelerates the fatigue of the material, causing the material to break. We have checked hundreds of cases of steam turbine blade fracture at home and abroad, and found that more than 80 of them are related to the resonance of the blade. Therefore, in order to improve the service life of the steam turbine, we must find a material with better vibration damping performance. ”

"12Cr stainless steel is recognized as a material with good vibration damping performance, but in Zhang Gong's eyes, it still does not meet the requirements." An Zixuan said helplessly.

Zhang Yihua insisted: "Recognition is recognition, and facts are facts. We have tested it in the laboratory, and the 12Cr stainless steel produced in our country does not meet our requirements. If the blades are made from existing steel, we estimate that the service life of our steam turbines will only reach about one-third of that of ALK. ”

"This is absolutely not allowed." Lin Zhenhua said, "We are engaged in big ethylene, not to look good, but to catch up with the advanced level of shijie." Since we want to do it, we must do it better than ALK. ”

An Zixuan said: "We also think so, so we are currently actively studying this problem, and we must find out the reason for the lack of vibration damping performance of the material." ”

"It must have something to do with the micronutrient formulation of the steel." Lin Zhenhua asked. He knows that the type of steel only reflects its main components, and in the actual smelting process, in order to achieve a certain aspect of performance, people often have to add some trace amounts of other elements to the steelmaking furnace. The ratio of these trace elements is a secret of various steelmaking enterprises, sometimes people say that the products of some steel mills are good, and the products of other steel mills are poor, in fact, they are often poor in the control of these trace elements.

An Zixuan said: "That's true, we went to the steel mill to understand, our smelting technology is not a problem, the main reason should be in trace elements, so we Yijing is starting to study the formula problem." By the way, Kobayashi has played a big role in this regard. ”

Speaking of this, An Zixuan turned his head and said to Lin Fanghua, who was sitting beside him, "Xiaolin, tell your brother about the situation you are studying now." ”

Lin Fanghua became An Zixuan's doctoral student as Lin Zhenhua wished at this time. An Zixuan knew that she was Lin Zhenhua's younger sister, so she naturally took extra care of her. And Lin Fanghua did not embarrass her brother, she took several other doctoral and master's students to undertake a lot of research work.

"Regarding the formulation of trace elements in 12Cr stainless steel, our current idea is to consult foreign materials first, form a systematic idea, and then conduct experiments. The main source we consulted was the current Soviet data from the Hanhua Institute of Technology. The Soviet Union had extensive experience in the manufacture of industrial steam turbines, and the largest 1,200 MW single-shaft steam turbine on Shijie was put into operation in the USSR in 1982 with a pressure of 24 megapascals and a steam temperature of 540 degrees Celsius. Lin Fanghua talked eloquently to her brother.

Lin Zhenhua asked, "To what extent have you checked the information so far?" ”

Lin Fanghua said: "We Yijing have been checking for more than two months, and after reading thousands of experimental records, Yijing has some preliminary ideas. However, it is estimated that it will take at least half a year to finally form a clear idea. ”

Lin Zhenhua took a slight breath as if he had a toothache and said, "Xiaofang, is your progress a little too slow?" It will take half a year just to check the information, and when the materials are experimented, it will not take a year? Zhang Gong: They're waiting for your materials to build a steam turbine. ”

Lin Fanghua said angrily: "Mr. Lin, do you have a little conscience?" We read thousands of experimental materials in two months, and some of them were in Russian, and now I have to start learning Russian. ”

An Zixuan smiled and relieved Lin Fanghua and said: "Manager Lin, I can't blame Xiaolin, the sorting of materials is indeed very boring and heavy, as far as I know, Xiaolin's classmate Yijing has not taken Sundays off for several weeks." ”

Lin Zhenhua said with a smile: "This girl, she has to be tired, her work is so intense, I think she seems to be a little fatter." ”

Lin Fanghua said: "You don't know, the busier I am, the fatter I get, and I'm so busy that I don't even have time to lose weight." ”

"However, half a year is indeed too long." Lin Zhenhua sighed.

Zhang Yihua said: "This is something that cannot be helped, scientific research has its own laws. We are lucky to have these Soviets without them, and I am afraid that it will be difficult for us to solve this problem in two or three years. Manager Lin, you don't have to worry, before the materials come out, we can also carry out some other aspects of design first, so it won't take too much time. ”

"That's all there is to it." Lin Zhenhua said, "Then it's hard work for everyone." ”

As he said this, the office door was suddenly pushed open, and Bi Min rushed in with a newspaper. Seeing the room full of people, she was stunned for a moment, and stopped talking.

"What's the matter, Bi Min, what's the matter?" Lin Zhenhua noticed the complicated expression on Bi Min's face and hurriedly asked.

Bi Min said: "Manager Lin, Assistant Xiang called from Xunyang just now, "> looking for you." ”

"Did he say anything?". Lin Zhenhua asked.

Bi Min handed over the newspaper in his hand and said in a low voice: "He told me to go to the reference room to find this newspaper, and said that he would give it to you immediately." ”

410 blade material

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