The ARJ21 new regional aircraft includes basic, freight and business models, with 78~90 seats and 2225~3700km. It is mainly used to meet the requirements of the radial route from the central city to the surrounding small and medium cities. It is reported that after the delivery of ARJ21, according to industry regulations, the new aircraft must pass the operational certification, conduct 100-hour verification, review the supplementary documents, and prove that it meets the standards of the Civil Aviation Authority before it can be used. It is expected to be delivered after 3 months of delivery. market.
The ARJ21 aircraft is the first aircraft in China's civil aircraft industry to be fully operational with independent intellectual property rights. It has initially explored a civil aircraft technology route of “independent development, international cooperation and international standards”. ARJ21 has established a management system for foreign system suppliers in accordance with the internationally developed management model of “Main Manufacturer-Supplier”. The system development requires the system design requirements and technical indicators from the Chinese side. The Chinese side and the foreign suppliers jointly define the foreign suppliers to conduct research and development, and the Chinese side conducts monitoring, review, approval and airworthiness certification. The Chinese finalizes the aircraft-level system integration and integration.
Jin Zhuanglong, chairman of COMAC, said that through the development of the ARJ21-700 aircraft, China has completed the whole process of design, manufacture, test and flight test of the jet submarine passenger aircraft, and mastered the stall, minimum ground speed, flutter, natural icing, landing gear. A large number of key test flight technologies and new technologies, new materials and new processes such as shimmy have established a civil aircraft industrial system, which has opened up a path for the smooth development of the C919 domestic large-scale passenger aircraft project and created favorable conditions.
The C919 is a medium and short-haul commercial trunk aircraft with independent intellectual property rights in China. The standard voyage design has a voyage of 4,075 kilometers and the increased voyage design has a voyage of 5,555 kilometers, which can meet the operational needs of airlines on different routes. The development goal of the C919 passenger aircraft is to provide safe, comfortable, energy-saving, environmentally friendly and competitive medium and short-range single-channel commercial transport aircraft for the civil aviation market. In terms of market positioning, we will provide domestically-based products, while taking into account foreign markets, providing products of multiple grades and multiple voyages.
At present, the number of domestic and foreign users of the C919 large passenger aircraft is 21, and the total number of orders has reached 517. The C919 first aircraft is scheduled to fly in 2016. According to forecasts, after the C919 successfully entered the market, the total sales volume is expected to reach 2,000 sorties. The era of China without large civil passenger aircraft will also become history. According to industry insiders, the successful self-research of ARJ21 and C919 has not only become a historical turning point in the development of the civil aircraft industry, but also will bring a huge market for the aluminum processing industry closely related to the aviation industry.
Aluminum alloy has become a key structural material for aircraft manufacturing due to its unique advantages such as low density, moderate strength, easy processing, corrosion resistance, abundant resources and strong recyclability. High-strength aluminum alloy has the advantages of low density, high strength and good hot workability. The plates, extruded profiles and hub parts made of it have broad application prospects in aerospace components. For example, high-strength aluminum alloy thick plates are used as the main bearing members, and the proportion of use accounts for 30% to 35% of the total aluminum consumption on the aircraft. At present, the aluminum alloy materials used in aviation civil aircraft mainly include: aluminum alloy castings, aluminum alloy forgings, large-section aluminum alloy extruded profiles, aluminum alloy thick plates, and the like.
It is reported that the selection of ARJ21 aircraft is mainly aluminum alloy, the quality of aluminum parts accounts for 75% of the net mass of the aircraft, and the aluminum alloy for ARJ21 aircraft is basically the same as that of the Boeing B777 aircraft. The fourth generation high-strength with excellent comprehensive performance is selected. The damage-resistant aluminum alloy is used to manufacture the main structural parts; while the structural parts of the front fuselage, middle fuselage, mid-rear fuselage, nose and wing of the C919 are almost entirely made of aluminum, the total working quality of the C919 aluminum It accounts for 65% of the total net mass of the aircraft.
The growing demand for air transport and general aviation services has created a broad market space for the development of the aircraft industry. It is estimated that in the next 10 years, the world will need 12,000 trunk aircraft, 0.27 regional aircraft, 18,300 general-purpose aircraft and 12,000 helicopters, with a total value of about 2 trillion US dollars. At the same time, with China's airspace management reform and low-altitude airspace With the open advancement, the domestic general aircraft, helicopter and drone market is huge.
According to the International Air Transport Association (IATA) survey report, in the next 20 years, China will surpass the United States in terms of the number of passengers in the world to become the world's largest aviation market: the total number of global aircraft passengers will double in 2034, reaching 7.4 billion in the year. With an average growth rate of 5.2%, China will have 1.19 billion passengers in 2034, surpassing 758 million in 2014. The number of aircraft passengers in the US market will grow at an average rate of 3.1%, which will allow passengers to reach 2034. 1.16 billion people. At the same time, the association predicts that China will become the world's number one in 2029.
According to Airbus forecasts, the total number of new aircraft added in China will be 5,363 in the next 20 years, including 3,567 single-aisle aircraft, 1,477 dual-aisle aircraft, and 319 super-large aircraft.
After years of development, China's aluminum processing industry has become an internationally recognized big aluminum producing country. At present, whether it is aluminum alloy melting equipment, rolling equipment, aluminum alloy extrusion equipment and finishing equipment, modern first-class aluminum processing equipment The number is the largest for all countries in the world, but due to the weak research of basic research and high-end technology, the high-end aluminum used in the aerospace industry is still short-board. Since China's modern aluminum processing industry in 1956, the required aerospace aluminum alloy slabs have been in a net import state.
Among the materials of the ARJ21-700 and C919 large passenger aircrafts with independent intellectual property rights in China, the quality of aluminum alloy parts accounts for 65%~75% of the total mass of the aircraft. According to the plan, by 2018, more than 30% of the aluminum alloy materials used in the ARJ21 regional passenger aircraft and the C919 large aircraft will be made of domestic aluminum. However, Zhang Jun, deputy chief engineer of the Shanghai Aircraft Design and Research Institute of China Commercial Aircraft, attended the “2015 New Materials International”. At the high-level forum on development trends, it is said that the proportion of domestically produced materials used in China's large aircraft C919 is only 5% to 6%. The demand for aluminum alloy materials by large Chinese aircraft has increased the urgency of R&D and large-scale production of aluminum alloys for Chinese aluminum processing enterprises.
Recently, the Ministry of Industry and Information Technology, the Department of Raw Materials Industry and the Department of Equipment Industry jointly organized the first "Working Mechanism for the Cooperation of Civil Aircraft and Aluminum Materials" in Shanghai. Zhou Changyi, director of the raw materials department of the Ministry of Industry and Information Technology, said that in order to promote the synergy between the civil aircraft and the cross-industry of the civil aircraft, the Ministry of Industry and Information Technology will take the lead in setting up the “upstream and downstream cooperation mechanism for civil aircraft aluminum”, focusing on the research and development and production of aviation aluminum. And the application of key links, promote the complete supply of aviation aluminum materials, establish independent innovation material system and equipment technology system, give full play to the role of cooperation mechanism, increase support for key brand development and platform construction, improve the guidance policy for civil aircraft aluminum application and The standard system encourages state-owned enterprises and private enterprises to promote each other and integrate military and civilian.
China Zhongwang, the world's second largest and largest manufacturer of industrial aluminum extrusion products in Asia, participated in the conference as one of the members of the "civilian aluminum upstream and downstream cooperation mechanism". It is reported that as the leader of private aluminum enterprises, China Zhongwang has already begun to explore and practice in the field of aerospace aluminum: In 2013, Zhongwang started the specification, characteristics and strict quality requirements for aluminum profiles in the aerospace industry. The research and development project of “7075 Aviation Extrusion Bar”; in 2015, Zhongwang Civil Aircraft developed the 7075 alloy thin-wall profile structural parts successfully, meeting the needs of civil aircraft design and manufacturing, laying the foundation for the company to enter the aircraft manufacturing field; 2015 Zhongwang also co-founded the Liaoning Aerospace Aluminum Alloy R&D Joint Laboratory with Shenyang Aerospace University and China Aviation Shenfei Civil Aircraft Co., Ltd. Zhongwang Group is now able to produce high-strength aluminum alloy sheets, rods, tubes and aluminum extrusion products for different parts.
In addition, Zhongwang's Tianjin aluminum rolled products project has been in preparation for five years. The first annual design capacity of the project is 1.8 million tons, including two production lines. At present, the construction and equipment installation of the first production line has been basically Completed, the final stage of equipment commissioning is in progress. The first production line mainly produces aluminum alloy plate, including transportation plates used in aerospace, marine, commercial vehicles and rail vehicles, and plates for chemical containers. After the project is put into production, it is expected to reverse the situation that domestic high-end aluminum products depend on imports.
"The development requirements for the autonomous aluminum of civil aircraft will inevitably promote the further development of domestic high-end aluminum." According to industry insiders, "Because of the high technical requirements, some aluminum companies with scale and strength will take the lead in benefiting these. Enterprises often have the world's top modern aluminum processing technology and equipment, and also strengthen research and development efforts, actively introduce industry talents, and promote the implementation of national policies, domestic aviation aluminum is expected to achieve "curve overtaking" as soon as possible.