the steel strips technology developed
Advances in steel rolling technology and equipment to the rail, H-beam steel Yaita and other large steel more significant. Part of the past with the universal rail mill, but most use complex double mill production. Now in order to improve the dimensional accuracy and reduce the cost of the roll in the middle and finish universal mill mainly process again.
Vector steel plate size large. Past, 400mm wide U-shaped steel Yaita mainly to billet production is subject to 8 to 10 times rolled. Normally takes three to four double repeatedly rolling mill, now developed by H-beam rolling mill rolls can only replace the production of steel Yaita technology. In the past by an asymmetric steel welded Yaita, is now available mill. To meet the large-scale projects, U-shaped steel Yaita width has been expanded to 600mm, rather than symmetric width is up to 900mm.
H-beam type size within the past master, now Paul dimensions of rolling technology has been developed, namely the use of the width can be adjusted online web roll and internal oblique mill expansion. There can produce consistent within the type size, but different specifications eccentric trimming type rolling mill, which can be replaced by welding the past production of H steel varieties.
H-beam mill to take a more BD-UR / E / UF arrangement, the use of continuous casting billet shaped blanks. However, this can not be used while the production of steel mill Yaita etc. steel, for the successful development of the rolls by replacing part of the new rolling mill to achieve universal, and even produce angle iron and other products.
On the development aspects of steel rolling equipment, new-style universal mill took a hydraulic way, the mill compact, when changing the roll stand can be split, so that the roll change time is much shorter. According to user requirements for high performance construction steel, plate aspect in the promotion of effective TMCP technology, adding Nb, V and Ti in order to improve the strength of steel, is now used in H steel production
