Certificates

 

WKZ014-2006          1E0682

1. Rolling millsshould arrange production reasonable when pack furnace, ensure change new roller after rolling, before change new roller. ,benxi steel stay in the soaking zone in the continuous furnace  

2. Make sure the billet heating billet temperature, and burn them thoroughly soaking pit. Total heating time≥10 min/cm, the highest heating temperature ≤1240 ℃. long-term heating on the furnace head is banned, so as to facilitate the iron removal.

3. Strengthen high pressure water phosphorus removal and vertical roll extrusion, ensure all iron sheets.

4. Open rolling temperature of 1050 ~ 1100 ℃. Ⅱtype controlled rolling, air steel thickness quartile 2 h, Ⅱstage opening rolling temperature ≤900 ℃, finishing temperature ≤800 ~ 850 ℃.

5. That should pay attention to prevent waves rolling sickle shape, bending plate shape, etc.

6. ACC cooling return red temperature: 640 ~ 680 ℃.

Before Straightening and during the straightening , frequently check and grinding roller surface, and avoid roller. Roughness exceeds the steel plate, can save by hot way.