Remplacer les gros avions domestiques paralliage de titane
En 2006, le Conseil d'État a approuvé la création d'un comité de démonstration du programme des gros aéronefs. Cao Chunxiao est le seul membre engagé dans la recherche sur les matériaux aéronautiques. Après le lancement du projet, Cao Chunxiao a été membre du comité consultatif d'experts et a voyagé dans tout le pays. Le projet de gros aéronefs couvre les aéronefs civils et militaires, et le code des aéronefs civils est C919.
The less weight an airplane has, the better. The weight of the airplane itself is a percentage of its total take-off weight, which is called the "structural weight coefficient of the airplane". In the past 70 years, no aircraft has had a structural weight factor of less than 27 percent , which is due to the performance of large components and the manufacturing capacity of large components. Titanium material becomes the key. Alliage de titaneles matériaux et la technologie de forgeage peuvent réduire le poids structurel des avions et améliorer leur compétitivité.
Today, the more economically demanding C919 uses 8 percent titanium, comparable to 7.5 percent of the Boeing 777 in the U.S. Large aircraft can not be manufactured without large forgings which require high technology. In the column "Academician's Introduction", Cao Chunxiao shows titane forging joint for C919, named TC4, weighing 600 kg. To make similar forgings, China has built the world's largest 80,000-ton hydraulic press.
In November 2015, C919 with China's independent intellectual property rights was officially unveiled worldwide in Shanghai. Cao Chunxiao was thrilled at the scene and his dream of more than forty years came true at last.
Le 5 mai 2017, l'avion de ligne C919 a effectué son premier vol réussi à Shanghai. En mars 2021, C919 a pris la première commande. Début 2022, le C919 avait pris 815 commandes.
