| 摘要 |
Metallic work pieces are annealed under protective gas in bright annealing furnaces with subsequent cooling line. Exogas or nitrogen is used as protective gas. In the latter case, liquid nitrogen is evaporated and introduced at several locations in the bright annealing furnace and the cooling line. For the purpose of decreasing the installation costs, increasing the performance and improving the quality, the liquid nitrogen is sprayed without prior evaporation onto the material to be annealed, namely in the end zone of the cooling line. |
