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1. • CommentAuthorkaiernano
   • CommentTimeMar 29th 2009

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   Energy-saving nano alloy grain refinement TiN applied in steel
   
   Energy-saving mechanism of nano TiN:
   Nano TiN have transition of electron as absorbing infrared, transit from high energy level to low energy level, then release much energy. When TiN is heated fully mixed with metal materials, because nano TiN releases energy interior and improve the temperature inside of the furnace, largly improve the smelt rate of metal, and improve the efficiency of metal smelting. Then save the energy for a wide range. Proof by emperiment: It reduces to 4 hours from 6 hours when smelting 750 KGS steel in intermediate frequency inductive stove. This technology is mainly used to improve smelting rate and low down the loss of steel making.
   
   Grain refinement mechanism of nano TiN:
   Nano TiN comes into lattice to make alloy nucleation small to refine alloy grain., then improve the performance of alloy. The thinner of grain, the more of crystal grain boundary unit volume. Because atomic array of crystal grain boundary is more disorder than atomic array of internal grain, the dislocation is high. As that, the crystal grain boundary snarls with slip dislocation normally caused by grain, then it is not easy to keep slipping across the boundary, the deformation resistance is increased, and it performances the improvement of intensity(part of mechanism).
   Nano alloy breaks the law of usual production of alloy, which is the conculsion of hardness improvement necessiarly with reduction of toughness. For small sized grain, the high surface activity of nano TiN could make grain combine rapidly, then make the size of grian larger and low the driving force as the combination of grains. And finally it forms the whiske structure inside the alloy, then improve the hardness and toughness of alloy.
   From the above, nano TiN applied in smelting steel, could not only save energy, but also improve every mechanical property of steel. This technology are widly used in metal smelting, ceramic sintering, powder metallurgy. And it could help such industies save much more energy, and improve the quality.