On August 1, 2022, the Chinese-made large aircraft C919 completed the certification test flight. From the successful first flight five years ago to the completion of the certification test flight now, when this large civil jet aircraft with independent intellectual property rights will be able to carry out passenger operations has been prepared. attention.
As the first company in China to obtain the qualification of qualified supplier of high-performance aluminum alloy and titanium alloy for domestic large aircraft C919, ZLXN provides more than 50% of high-performance aviation aluminum materials and more than 30% of titanium alloy precision components.
ZLXN has provided 30 specifications and more than 600 pieces of aluminum alloy materials for C919, which are mainly used in wings, landing gear and other parts, and are the key structural parts of aircraft. Domestic blank.
As early as April 11, 2018, the Commercial Aircraft Corporation of China, Ltd. issued the 7050 thick plate project approval certificate to ZLXN, marking that the 7050 aluminum alloy pre-stretched thick plate developed by ZLXN officially passed the China Civil Aviation Airworthiness Appraisal and obtained China Authorized by COMAC, it entered the C919 aircraft qualified product catalog, becoming the first domestic qualified aluminum supplier for large aircraft in China.
Obtaining the authorization and certification of COMAC is the greatest recognition of ZLXN’s R&D and innovation capabilities of high-performance aluminum alloy materials, and has far-reaching strategic significance for promoting the localization of aviation aluminum materials. The 7050 aluminum alloy pre-stretched thick plate developed by ZLXN was successfully equipped with the domestic large aircraft C919, which broke the monopoly of foreign technology and completely reversed the passive situation of China’s long-term dependence on imports of advanced aluminum alloy materials.
7050 aluminum alloy pre-stretched thick plate is the aluminum alloy material with the widest application range and the largest number of applications in the aerospace field. The material has the characteristics of high strength, high toughness, fatigue resistance and damage resistance, and is an indispensable key material for various key structural parts in the aerospace field. Non-deformable features.
Due to high technical content and high added value, and the long-term implementation of technical blockade abroad, China’s long-term dependence on imports of 7050 aluminum alloy pre-stretched thick plates has seriously restricted the research and development of domestic large aircraft and other key model projects.
Since then, ZLXN has successively obtained a number of materials approved by COMAC. Following the C919, the new generation of large-scale CR929 passenger aircraft has also broken through the tough matching technology through the 7050, and successfully achieved the first delivery.
At present, COMAC Special 2196 and 7475 developed and produced by ZLXN are undergoing airworthiness appraisal.