我国火箭改用不锈钢，这能行吗？马斯克：感觉中国在倾听我的话

Core Viewpoint - The article discusses the innovative use of stainless steel in the development of rockets by a Chinese company, Arrow Technology, highlighting its potential advantages over traditional materials like carbon fiber and aluminum alloys in terms of cost and performance [3][5][11]. Group 1: Project Overview - Arrow Technology recently held a groundbreaking ceremony for its medium to large liquid rocket assembly and testing facility, which will be the first stainless steel rocket super factory in China [3]. - The total investment for the project is 5.2 billion yuan, with a future production capacity of 25 rockets per year [3]. - The "Qiantang" rocket developed by the company has a height of 66 meters, a diameter of 4.2 meters, and a launch mass of 575 tons, with a low Earth orbit (LEO) payload capacity of 14 tons [3]. Group 2: Material Advantages - Stainless steel is significantly cheaper than aerospace-grade aluminum-lithium alloys and carbon fiber composites, which can cost tens to over a hundred dollars per kilogram, while industrial-grade stainless steel is priced at a few dollars per kilogram [5][9]. - Stainless steel exhibits excellent high-temperature resistance, maintaining strength under extreme conditions, which can reduce the need for extensive thermal protection materials and lower overall costs [7][9]. - The welding technology for stainless steel is more mature and less demanding in terms of environmental conditions compared to carbon fiber, which requires controlled environments for layering and curing [7][9]. Group 3: Industry Trends - The shift towards stainless steel in rocket manufacturing is seen as a growing trend, with other companies, including Blue Arrow Aerospace, also developing stainless steel rockets [11]. - The article references SpaceX's transition from aluminum alloys to stainless steel for its Starship, indicating a broader industry movement towards this material for reusable rockets [11]. - The advancements in China's commercial space sector, including the development of stainless steel rockets, are viewed as significant steps towards catching up with international leaders in the field [11][15].