| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a surface treatment method of a ferrous metal material, which can reduce the amount of reactive gas delivered into a furnace and can shorten the time spent for surface treatment of the ferrous metal material. <P>SOLUTION: The surface treatment method of a ferrous metal material 1 is a method which delivers a plurality of reactive gases into a furnace 2 and performs surface treatment of the ferrous metal material 1 arranged in the furnace 2 using the plurality of reactive gases, wherein jet flows of the plurality of reactive gases are collided with each other when the plurality of reactive gases are delivered into the furnace 2. <P>COPYRIGHT: (C)2013,JPO&INPIT |
