Chinese Youth May 4th Medal winner | Create a "backbone" for the Rockets

The "Chinese Youth May 4th Medal" is the highest honor of the Central Committee of the Communist Youth League and the National Youth Federation awarded China's outstanding young people. It aims to establish a typical typical typical of political progress, excellent morals, and outstanding contributions, reflecting the pursuit of the spiritual character and value of contemporary youth. This year, another group of young scientific researchers and groups won the "Chinese Youth May 4th Medal".

In order to show the spirit of the outstanding venture capital of Chinese young scientists, encourage young scientific and technological workers to be the inheritors of scientists, the pioneer team of innovation, the practitioners of the deep integration of the science and technology economy, the road building of the community of human destiny, "Chinese science and technology information information 》 Magazine continues the brand of the "Young Scientist" column, dialogue has obtained the personal and groups of the "Chinese Youth May 4th Medal", showing their scientific research history and results, and discussing the profound meaning of the "scientific spirit" in the hearts of young people.

The Long March 9 Lauding Rocket is a heavy -duty carrier rocket that my country is demonstrating. Compared with the largest carrier Rockets Long March 5 in active duty in my country, its near -ground orbital carrier capacity has increased from 25 tons to 140 tons. The diameter is increased from m5m to ø10m. The storage tank is the core component of the carrier rocket storage propelled agent and passing thrust. It consists of the bottom of the box, the transition ring, and the cylinder section, accounting for 60-70%of the weight of the arrow body structure. However, in the early days of the Long March 9 Rockets, my country did not have the overall transition ring, the bottom of the boxes and other arrows in China, and the main structural capacity and precedent of the main structural parts of the arrows. One of the tasks.

On the campus of Central South University, there is such a scientific research team that focuses on the major needs of heavy -duty carrier rocket structural parts and the problem of "stuck neck" facing. , Give full play to the wisdom and strength of the team's collective, successfully prepare the world's first oversized aluminum alloy ingot, ultra -large aluminum alloy ring forging, oversized box base melon petal and other storage box structures and materials, breaking the "Long March 9" heavy carrier carrier Rocket oversized structural parts manufacturing technology bottleneck.

They are the research team of strong aluminum alloy flow transformation technology and equipment research team in Central South University. The team has a total of 50 people, and young people under the age of 35 account for 70%. On May 3, the results of the 26th Chinese Youth May 4th Medal were officially announced. The Research Team of Aluminum Along in Central South University, as one of the 16 outstanding youth collectives that have been awarded the award in the country, won the "Chinese Youth May 4th Medal Collective" award.

A few days ago, "China Science and Technology Information" and this aluminum alloy strong flow transformation technology and equipment research team from Central South University started a dialogue, listening to the story of chasing space dreams with youth and wisdom.

"Hard Bone" for raw material preparation technology

In 2014, Central South University's aluminum alloy stream change technology and equipment research team undertook the task of development and development of the "Long March 9" heavy -duty carrier -storage box storage box. Ultra -aluminum alloy ingots are the original materials for manufacturing the overall structure of large -scale carrier rockets. The quality of its quality often determines the performance benchmark of subsequent components. The large amount of metal required for the overall manufacturing of heavy -duty carrier rockets exceeds 10 tons. The preparation of oversized ingots is facing problems such as severe analysis, uneven composition, and cracking.

In order to prepare a high -quality large aluminum alloy casting ingot, in 2014, the team quickly established a super -large aluminum alloy ingots preparation technology research team. Under the leadership of the team leader, the team proposed a technical route that collaborated from various links such as composition ratio, melting, stirring, residue, refining, etc., and invented the technology and equipment of ultrasonic assistance casting process; young scientific research "Bearing Soldiers" We put on experiments into the engineering base, and worked next to the melting furnace of over 800 ° C for more than 10 hours a day to challenge the physiological limit. The young people laughed that each cast was a free "steam sauna".

After hundreds of laboratory research, the team captured the technical difficulties of melt purification, uniform composition, and high -quality large aluminum alloy ingot. In July 2015, the world's largest diameter was 1380mm, and the quality reached 17 tons. The 2219 high -level aluminum alloy ingots provides important guarantees for the development of heavy -duty carrier -carrier rockets.

New breakthroughs in the manufacturing technology of the storage box structure

The heavy -duty carrier rocket must carry adequate pushing agents. The storage box storage box is the largest part of the rocket. High -performance manufacturing of the storage box structure is an important way to improve the rocket loading capacity and reliability.环 The 10 -meter transition ring is the key supporting component of the heavy rocket storage box structure. It is called the "backbone" and "manufacturing benchmark" of the rocket. Its overall forming manufacturing has no precedent in the world; The "lid" of the box is twice the area of ​​the widow 5 of the "Saturn 5" in the United States. Its accuracy requires that there is no precedent for the manufacturing of the large complex thin wall surface components in China. Perform strict blockade.

In order to break through the high -performance overall manufacturing problem of the high -performance overall manufacturing of the 10 -meter large aluminum alloy loop, the team super large ring forging team relying on the team's engineering base, more than 200 simulation ring tests have been completed, and the key to restricting the comprehensive performance of the ring piece has The factors have invented a series of new technologies such as homogeneous forging, fine crystal rolling, and have carried out more than 10 large -ring forging and ring rolling tests in production companies such as southwest aluminum, Zhangjiagang Central Haiki, Wuxi Parker, and Wuxi Parker. After nearly three years of research, in May 2017, the team prepared the overall transition ring of the world's largest diameter ø 10m high performance 2219 aluminum alloy storage box, and the accuracy and mechanical performance of the formation achieved design goals. Related technologies are used in the high performance manufacturing of the Long March 5 米5m transition ring, which effectively solves the major technical problems encountered in the development of low -temperature storage boxes in my country's heavy -duty carrier rockets. With support, military and social benefits are significant. In order to overcome the problematic manufacturing problems of the heavy -duty -level thin -wall melon -based coordinated manufacturing problem, the team's melon -shaped corporation team proposed the first time to use the creep timeliness and forming technology to achieve the precise forming of the large storage of the melon petals, breaking through the traditional thin wall component forming manufacturing manufacturing manufacturing manufacturing manufacturing manufacturing manufacturing The limits of technology have overcome difficulties, broke through in foreign technology blockade, and through many years of research, in April 2018, based on creep -based forming technology, the world's largest ø 10M -level heavy -level carrier rocket storage boxes and top lids were successfully developed. Both and performance have achieved design goals, achieving high-performance and high-precision manufacturing of ultra-large thin-walled components, and solved the "card neck" problem of complex thin-walled structural parts of CZ-9 heavy rockets in my country. Essence

Production-learning-research and integration training talents and service society

Central South University's aluminum alloy strong flow transformation technology and equipment team were founded in 2004. The scientific research work serves major national needs of the country. This is the insistence of all members of the team. This artist team not only made the aerospace industry, but also "made materials" for the team itself.

On the one hand, the team adheres to the combination of industry -university -research, through the transformation of results, applies technology to actual product preparation, meets national needs, deeply cultivates aluminum alloy materials and component high -performance manufacturing and engineering applications, breaking through large aluminum alloy ingots, ring forging, thin, thin, thin The whole process of wall parts and other materials and components prepare key technologies, establishes the technical specifications of ultrasonic auxiliary casting process, and realizes the batch of large -scale ingots such as 2219, 2A14, 7XXX and other series of aluminum alloy. The whole process of the ring forged process coordinated manufacturing system, which is widely used in high -performance manufacturing of ring -cylinders in the fields of aerospace, military industry.

In 2019, the team's "Aerospace Ultra -Large Aluminum Alloy Materials and Component High -performance Manufacturing" series of innovative technical achievements were transferred to 200 million yuan to Hunan Zhongchuang Sky New Material Co., Ltd. Aluminum alloy ring forging, aluminum alloy squeezing, aluminum alloy sheet metal 5 production lines, only the melting casting line was put into production to achieve an annual output value of 390 million yuan in 2021. The annual output value of the five production lines in 2022 is expected to exceed 800 million yuan, economic and social benefits Significantly.

On the other hand, driven by major national strategic needs, a group of young scientific researchers in related disciplines joined the science and technology research team to form a "big team" to carry out "conference war" to achieve "big breakthroughs". Young scientific researchers cultivated the patriotic spirit in the process of participating in national projects and solving the "card neck" technology, strengthened the role of the times, practiced excellent skills, and realized the wages of the youth science and technology talent team. In recent years, the team's backbone growth has been a specially -appointed professor of the "Yangtze River Scholars" of the Ministry of Education, 1 young talent for national defense, 1 young talent in the middle of the Ministry, 1 youth Yangtze River scholar, 1 EU Scholar Scholar Scholar, and a postdoctoral nationwide 1 innovative talent, one young man in the Chinese Academy of Sciences, 1 member of the National Outstanding Communist Youth League, and two other young innovative talents at the provincial and ministerial levels; cultivated the highest award of doctoral dissertations in the field of mechanical engineering in China- "Shangyin Youbo" gold award, excellent excellent One of the prizes and masterpieces, five people won the provincial outstanding doctoral dissertation; two were rated as an excellent graduate instructor in Hunan Province.

The team's research results have won 3 national awards such as the "First Prize of National Science and Technology Progress" and 5 first -class prizes at the provincial and ministerial level. Promote the innovation team of key areas of the plan, and was selected into the Chinese non -ferrous metal innovation contest in 2021, and won the 18th Hunan Youth May 4th Medal in 2021. The branch was evaluated for the third batch of national party building sample branches.

Conclusion

In the face of this award, Professor Yi Youting, the person in charge of the team, said that the team adhered to the spirit of major national needs, carried forward the spirit of self -improvement and scientific research, and worked hard to solve the key "stuck neck" problem facing the country. The scientific research direction is mainly prepared for key structural parts and equipment of aerospace. It is a more traditional industry, but it is also an industry that needs to be solved by many problems and many difficult problems. Achievements serve the country and society.

The team youth backbone said that this award allows everyone to strengthen their choices more. We must carry out scientific research on scientific research from national needs. Real product.

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