The cold drawn pipe needs to be heated strictly according to the process requirements during the operation, and the upper limit temperature heating is adopted to a certain extent, effectively preventing the low temperature heating, for example, the heating temperature of the carbon steel billet is increased by 20-30 ° C compared with the original process, respectively. The effect is better. According to statistics, the gap in the next five months fell by nearly 40%.
The cold drawn pipe is effective to a certain extent. For the inclined bottom furnace, the material must be diligently fed, so that the billet can be heated evenly, so that the appearance of the yin and yang surface can be eliminated, and at the same time, the furnace door is closed after the material is finished. Heat loss. To a certain extent, the rolling rhythm is strictly controlled to ensure that the billet is heated and penetrated without blackening. Avoid the phenomenon of perforated black spirals. Cold drawn pipes need to use high-quality heavy oil to a certain extent, so that the quality of the billet heating can be guaranteed.