This article, we mainly introduce 2 aspects of LR EH32 steel plates: EH32 shipbuilding steel manufacture technology and normalizing technology.
1. LR EH32 steel plates manufacture technology as below:
Blast furnace, hot metalpre desulfurization treatment, top and bottom blowing LF refining smelting, RH refining slab continuous casting, cutting, storage, billet heating, four roller reversible rolling, laminar cooling, straightening, finishing, surface blast test flashball heat treatment, air cooling, inspection, identification and warehousing.
2. LR EH32 steel plates normalizing technology:
The heating temperature is designed according to Ac3+ (50 to 100 DEG C). LR EH32 steel plates normalizing is controlled with three temperature sections: preheating temperature is 860 DEG C, heating temperature is (920 + 10) C, average heating temperature is (910 + 10) C. The heating rate is 115 ~ 210min/mm (including heating and soaking time), and the air is below 200 C after normalizing.
Mechanical properties of normalized LR EH32 steel plates are: σs 315 ~ 345MPa, σb 435 ~ 450MPa, elongation 33 ~ 39%, -40 C impact value is above 200J, -40 ageing impact value in more than 90J.
If any confusion of LR EH32 grade shipbuilding steel manufacture technology and LR EH32 steel plates normalizing technology, welcome to consult BBN steel at any time.
Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!
