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High-strength steel for buildings and armored vehicles

19.11.2012

A research team at Wayne State University has developed the toughest bainitic steel with microstructures composed of ferrite and stabilized carbon austenite.

Despite significant progress in the creation of new grades of high-strength steel, various industries feel an urgent need for lighter and stronger structures. New metals should improve energy efficiency, reduce environmental pollution, improve transport safety, and so on.

American scientists have been working on the creation of new materials with high yield strength, high impact strength and ductility. As a result, it was possible to create a new material consisting of bainitic steel and ductile iron of isothermal hardening. The new material has all the desired characteristics, in particular, excellent resistance to fatigue wear, which can ultimately lead to unexpected collapses of structures and deaths.

The secret of the new metal lies in a special processing technique based on isothermal hardening with holding in the bainite region (austempering). This type of heat treatment is more energy efficient and does not require subsequent additional heat treatment, which saves energy. The new steel has extremely fine-scale microstructures consisting of ferrite and austenite, and also contains a large amount of silicon.

The new metal is made from traditional raw materials and can be processed in common ways. At the same time, it has excellent characteristics and can be used in a variety of areas. So, during ballistic tests in Canada, the new steel demonstrated excellent armor qualities in terms of protection against the effects of a blast wave and shrapnel. Thus, the strength and durability of the new steel allows it to be used for the manufacture of armored vehicles and strengthening buildings.

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