Recently, ZZQY Light Alloy Technology Group, a manufacturer of high-strength, high-toughness and scandium-containing aluminum alloys and high-strength aluminum-lithium alloy forgings, successfully developed ultra-high-strength aluminum-lithium alloys and realized industrial mass production. The alloy has a tensile strength of 695MPa, a yield strength of 566MPa, and an elongation of up to Above 6%.
The strengths of the second-generation Al-Mg-Li alloy and the third-generation Al-Cu-Li alloy, which are currently mainly used in aluminum-lithium alloys, are 400MPa~500MPa and 500MPa~600MPa, respectively, while the ZZQY alloy adopts a new production process with independent intellectual property rights. , Achieved a breakthrough in ultra-high-strength aluminum-lithium alloy technology, greatly improved the performance of aluminum-lithium alloy, and filled the gap of 700MPa aluminum-lithium alloy under domestic industrial conditions. Compared with the traditional 7-series super hard aluminum alloy (7075), the alloy has a 5% lower density, 30% higher tensile strength, 20% higher yield strength, and 7% higher elastic modulus, which can effectively replace the existing high-strength/super-high-strength Aluminum alloy is of great significance to the aviation and aerospace fields where weight reduction is urgent.
The application of materials in the aerospace field can be described as “gram-gram-calculation”. For every 1kg weight loss of the rocket, the launch cost can be reduced by 20,000 US dollars; for every 1kg weight loss of the missile, the range can be increased by 15km. As a kind of lightweight and high-strength metal structural material, aluminum-lithium alloy has very broad application prospects in the aerospace field. For every 1% lithium added in aluminum alloy, the density decreases by 3% and the elastic modulus increases by 6%. The use of aluminum-lithium alloy instead of conventional aluminum alloy can reduce the structural weight by 5% to 15% and increase the stiffness by 15% to 20%. The weight reduction effect is immediate. It can significantly increase the payload of aerospace vehicles and has important economic benefits and strategic significance.
The ultra-high-strength aluminum-lithium alloy developed by ZZQY has four major advantages, namely low density, high modulus, high strength and industrialized mass production, which mainly depends on the advanced nature of the preparation process. Through the research, development and continuous optimization of the production process, ZZQY adopts the “full vacuum casting method” to solve the problems of easy hydrogen absorption, oxidation slagging, component segregation, and serious shrinkage in the aluminum-lithium alloy melting and casting process, thereby preparing high purity High-quality alloy ingots provide a strong guarantee for subsequent deformation processing to prepare high-performance aluminum-lithium alloy products.
At present, ZZQY can provide products such as 1420, 2195 and other grades of aluminum-lithium alloy plate, strip and foil, tube rod wire, forgings and other products in batches. At the same time, for the aluminum-lithium alloy pre-research models, the company also has the full-process development capabilities from design drawings to parts delivery (melting and casting, forming, heat treatment, machining, surface processing, and testing).