1. Characteristics
GB/T 9945-2012 hot rolled bulb flat steel has a unique cross-sectional shape with a bulbous projection on one side. This special structure makes it anisotropic in mechanical properties, with good bending resistance in the width direction, which can effectively disperse the stress. From the point of view of material composition, the reasonable ratio of C, S, Mn and other elements ensures certain strength and toughness. In the production process, follow the GB/T 9945-2012 standard, so that the hot-rolled ball flat steel dimensional accuracy is high, thickness, width and ball size tolerance can be controlled within a small range, to ensure the consistency and interchangeability of products. Its surface quality is good, although hot rolled, but through subsequent treatment can reduce iron oxide and other defects, easy to follow-up processing and use.
2. the advantages
Compared with ordinary flat steel, GB/T 9945-2012 hot rolled bulb flat steel has significant advantages. In terms of strength, it can realize high bearing capacity with relatively small cross-sectional area and save material cost. For example, under the same bending requirement, it can save about 10%-20% of material than ordinary flat steel. Its unique shape is conducive to improving structural stability and reducing the risk of structural deformation in shipbuilding. In terms of processability, it is easy to weld, cut and cold-formed, and can adapt to a variety of complex processing requirements. Moreover, due to the standardization of standards, its quality stability is high, and manufacturers can produce large-scale stable production, which reduces the production cost and market price, and has a high cost-effective.
3. the scope of application
GB/T 9945-2012 hot rolled bulb flat steel is widely used in many fields. In the shipbuilding industry, it is an important part of the hull structure, such as used in the manufacture of ship keel, ribs, etc. Its good mechanical properties and seawater corrosion resistance can protect the ship in the harsh marine environment of safe navigation. In the field of marine engineering, such as the construction of offshore drilling platform, GB/T 9945-2012 hot rolled bulb flat steel can be used to build the support structure of the platform, to withstand the huge impact of wind and waves and the weight of equipment. In the construction industry, some building components with special requirements for structural strength and shape can also be used, such as part of the beams and columns in large-span steel buildings, which can be used to realize the architectural design concept and ensure the safety of the building by utilizing its unique shape and mechanical properties.