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Professor Lu Zhaoping of the State Key Laboratory of New Metal Materials of the University of Science and Technology of China developed a new type of nano-strengthened ultra-high-strength maraging steel. This steel not only reduces costs, has a simple production process, but also has a high tensile strength. The international academic journal Nature has recently published their research progress online.
According to Prof. Lu Zhaoping, high-end ultra high-strength steels all have major needs in major high-tech fields such as aerospace, new energy, advanced equipment manufacturing, national defense security, and high-speed trains. The strongest steel material is maraging steel, mainly because this steel material contains a large amount of precious alloy elements such as cobalt, titanium, and molybdenum, but also undergoes complicated and rigorous smelting and heat treatment processes, so it is expensive and generally It is used only for important structural elements in aerospace and deep-sea technologies such as rocket engine housings, aircraft landing gears, and key links.
To further improve the ultimate strength of iron and steel materials, Prof. Lu Zhaoping's team innovated the concept of alloy design, greatly reducing the content of precious elements such as molybdenum, completely free of expensive alloying elements such as cobalt, and using different strengthening mechanisms to develop a high-density nano-precipitation reinforcement Ultra-high-strength maraging steel. The new ultra-high strength steel not only reduces costs, simplifies the production process, but also significantly improves overall performance.
Professor Dong Xu of Beijing Iron and Steel Research Institute stated that the research on the performance limit of steel materials is a research hotspot in recent years, and the strength limit is a dream that the industry has been pursuing. People in the industry generally believe that it is very difficult to further increase steel strength, shape and toughness. The strength of ultra-high-strength maraging steel developed by Lv Zhaoping exceeded 2,000 megapascals still has good plasticity, and the alloying cost is low, providing innovative thinking for the research and development of high-performance steel materials, not only promoting the development of high-performance steel materials technology, It can also be applied to the research of high performance of other alloy systems. (Reporter Li Jiangtao)
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