| 摘要 |
In the continuous hot dip galvanising of steel strip (1), containing some oxidizible addition elements in a proportion to improve the mechanical properties of the steel, the strip traverses through a galvanising furnace (3) under a reducing atmosphere. The furnace is made up of sections for the heat treatment, heating, soaking, cooling and dipping in a galvanising bath (2). The strip is subjected, upstream of the entry section of the furnace, to an oxidation treatment in conditions of temperature, duration and oxygen content of a gas in which the strip is steeped, such that the oxidizible addition elements may be oxidised essentially within the strip before it has had the chance to migrate towards the surface for it to form an oxide layer. An independent claim is also included for a galvanising line for the continuous hot dip galvanising of steel strip by this method. |
