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BEBON Steel has developed and applied non-water cooling and water cooling type TMCP technologies which meet the requirements of low Ceq high toughness, high strength steels with excellent weldability. TMCP technology was first developed as a plate manufacturing process. However, when applied to shape production, the rolling conditions are subject to more difficult restrictions than with plates due to the complexity of the crosssectional profile of shape steel and features peculiar to rolling with caliber rolls. Examples of these problems include the difficulty of securing homogeneous properties and dimensional shape accuracy in cross-sections containing differing thicknesses and the load capacity limitations of caliber rolls. Accordingly, JFE Steel successively developed and applied a proprietary non-water cooling type TMCP technology for steel shapes, followed by the first water cooling type TMCP technology for shapes.
(1) Water Cooling Type TMCP for Steel Shapes
In rolling asymmetrical NAB, the temperature of the flange is higher than that of the web during rolling and in finishing due to the cross-sectional profile (the flange is thick, whereas the web is thin). Accordingly, in the TMCP process for NAB, uniform strength
properties are obtained through the entire crosssection by securing sufficiently rollimg reducing in the low temperature region of Austenite and/or in subcritical regin for the web and applying accelerated cooling after rolling.
(2) Cooling Equipment for Shape Steel TMCP
The arrangement of the cooling equipment for TMCP for shipbuilding steel shapes. For accelerated cooling after rolling, an OLAC device is installed after the finishing rolling mill, while flange cooling devices are installed in the guides at the intermediate and finishing mills to improve homogeneity in all parts of the product and enhance TMCP efficiency. The respective coolingdevices are designed to enable temperature control considering the temperature characteristics of each part of the rolled material.
(3) Available Standards for TMCP
BEBON Steel has received certification to manufacture low Ceq high strength steels by TMCP from leading certifying organizations
GB T 5312 Carbon and carbon-manganese steel seamless steel tubes and pipes are mainly for ship use, also known as shipbuilding steel pipes. Under GB T 5312, there are mainly 5 steel grades: grade 320, 360, 410, 460 and 490. Each grade covers three levels: I, II, III.
Angle steel, commonly known as angle iron, is a long strip of steel whose sides are perpendicular to each other. There are equal angle steels and unequal angle steels. The two sides of equal angle steel are equal in width. The unequal angle steel is also known as L shape profile steel.
Flat bar steel can be produced according to the user's needs, with fixed thickness, width and length. It can reduce the cutting process for users, reduce the consumption of labor and materials, and also reduce the processing loss of raw materials.
Bulb flat steel for shipbuilding
The bulb flat steel is a kind of medium section material which is mainly used in the field of shipbuilding and bridge building, and the shipbuilding bulb flat steel is an auxiliary medium section material for shipbuilding.
The steel for shipbuilding and oil platform---FH40, is the high tensile strength steel.The shipbuilding steel FH40 is the Hull structural steel.We can provide FH40 shipbuilding steel plate price.
The steel for shipbuilding and oil platform---EH40, is the high tensile strength steel.The shipbuilding steel EH40 is the Hull structural steel.We can provide EH40 shipbuilding steel plate price.
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BBN SHIP STEEL FACTORY
