Certificates

WKZ013-2001  RRST-37-3Cu3N

1. The heating: furnace temperature to 800 ℃the following start to put steel, steel simmer for 1 hour, less than 950 ℃of warming rate < 120 ℃/ hour, > 950 ℃, and the speed of temperature rise not limited, the highest temperature of heat must not exceed 1250 ℃, when heating, furnace reduction or neutral as far as possible the atmosphere, heat preservation time according to B standards, only allowed in advance, and not allowed to put off the steel.

2. Rolling: open rolling temperature of 1050 ℃, finishing temperature of 850-900 ℃, Rolling Pass Reduction≤10% , rapid rolling.

3. Normalized: 900 + 10 ℃, heat preservation time 1.5-1.8 min/mm