Core Viewpoint - The development of the "Xinghu-700" high-temperature alloy turbine disc marks a significant breakthrough in China's aerospace industry, enabling the country to achieve self-sufficiency in critical aviation engine technology and reducing reliance on foreign imports [10][11]. Group 1: Historical Context and Challenges - The high-temperature alloy turbine disc, a crucial component in aircraft engines, has faced significant technological barriers due to Western countries' export restrictions and technology embargoes since the 1970s [1][4]. - China initially relied on expensive imports for turbine discs, which not only had high costs (over 1 million yuan per ton) but also long delivery times, severely hindering the development of domestic aircraft and advanced fighter jets [4][11]. Group 2: Technological Innovations - Chinese researchers began a project for the domestic production of high-temperature alloy turbine discs in 2000, achieving breakthroughs in material formulation by adding rare earth elements and optimizing alloy ratios, resulting in the "Xinghu-700" alloy that can withstand temperatures of 700℃ [6][8]. - The manufacturing process saw advancements with the development of "high-speed multi-medium jet flow cooling" technology, which improved the fatigue life of turbine discs by over five times [8]. Group 3: Economic Implications - The successful production of the "Xinghu-700" turbine disc is expected to reduce engine costs by 30%, significantly impacting the commercial viability of domestically produced large aircraft like the C919 [13]. - The international response to this technological breakthrough has led to a shift in export policies from Western countries, with companies like ThyssenKrupp and Safran expressing willingness to export high-end forging equipment and testing instruments to China [11][13]. Group 4: Broader Impact - The technological advancements in high-temperature alloys are not limited to aviation; they have also led to developments in other sectors, such as aerospace and nuclear power, indicating a broader rise in China's high-end manufacturing capabilities [15].