Certificates

 

WKZ060-2004     BB503      BB41BF

1. The ingot, billet all According to Ⅱgroup steel heating. uniform steel plate and burn them thoroughly When heated .Ensure that the surface oxidation iron is easily to be removed.

2. The Ⅱtype controlled rolling, Ⅰstage Open rolling temperature 1100 + 50 ℃, air steel thickness quartile 2 h, Ⅱstage Open rolling temperature≤920 ℃than open. Finishing temperature≤880 ℃.

3. steel plate normalized technology

normalized temperature: BB503 900 + 10 ℃

BB41BF 920 + 10 ℃

Heat preservation time: 1.5 min/mm