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The bending deformation of AH36 bulb flat after rolling is the result of the interaction between the inconsistent reduction rate during rolling and the uneven temperature field during cooling. The reduction ratio of the ball head is smaller than that of the web, which will lead to the deformation of the AH36 bulb flat in the direction of bending to the web, and the cooling rate of the web is faster than that of the ball head, which will lead to the deformation of the AH36 bulb flat in the direction of bending to the ball head.
Through the investigation of some domestic large-scale AH36 bulb flat production enterprises, it is known that the traditional cooling method of AH36 bulb flat generally adopts the arrangement of water cooling devices in the middle and rear of the cold bed to improve the bending of AH36 bulb flat, but it can only achieve the purpose of cooling, but can not improve the bending.
The temperature difference between ball head and web can be improved by water cooling before and after rolling, and the phase transformation caused by excessive one-time temperature drop can be avoided by multi-stage cooling. It can improve the bending condition of AH36 bulb flat and increase the yield and yield. However, water cooling devices need to adopt multi-stage water cooling to gradually reduce the temperature. A more advanced method to solve the bending problem of AH36 bulb flat is to adopt the technology of rolling in pairs and straightening by dividing and straightening, and to adopt the technology of water cooling after rolling.
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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