Certificates

WKZ043-2006       WQ690D（WH80Q）

1. steel ingot and billet heating according to Ⅱgroup steel, highest heating temperature 1260 ℃, 1200~1230℃temperature soaking pit.

2. according to the Ⅱtype controlled rolling, air steel thickness > 2 h, Ⅱstage open rolling temperature ≤930 ℃, finishing temperature ≤860 ℃.

3, quenching, heat temperature:940℃heat preservation time 25 min. According to the current  process WH80Q to execution for cooling.

4 tempering technology is not confirm.