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Wire Rod Bending Deformation Performance
- Aug 02, 2017 -

Wire Rod Bending deformation performance

1. Threaded steel rebar is a ribbed steel bar, divided into hot rolled ribbed bar and cold rolled ribbed bar. The rebar is also called deformed steel bar or shaped steel bar. Its difference with the light round bar is the surface with longitudinal and transverse ribs, usually with two longitudinal ribs and evenly distributed along the length of the transverse ribs. The rebar is a small steel sheet and is mainly used for the skeleton of reinforced concrete building elements. In use requires a certain degree of mechanical strength, bending deformation performance and process welding performance. Production of rebar raw material billet for the calm smelting treatment of carbon structural steel or low alloy structural steel, finished steel for hot-rolled forming, normalizing or hot rolling delivery.

     There are two commonly used classification methods for rebar:

First, according to the classification of geometric shapes, according to the cross-sectional shape of the ribs and rib spacing of different classification or classification, such as the British standard (BS4449), the rebar is divided into type Ⅰ, Ⅱ type. This classification mainly reflects the grip performance of the rebar.

Second, the performance classification (grade), such as our standard (GB1499), according to the strength level (yield point / tensile strength) will be divided into three grades of rebar; Japanese Industrial Standard (JISG3112), according to the overall performance of the thread Steel is divided into five categories; the British Standard (BS4461), also provides a number of grades of rebar performance test. In addition, according to the purpose of the classification of rebar, such as reinforced concrete is divided into ordinary reinforced concrete and reinforced concrete reinforced with heat treatment. China is a large producer of rebar, because China's large-scale investment in fixed assets, rebar is basically used to meet domestic demand, the export volume is not much. In recent years, with the development of infrastructure construction in China, the annual output of rebar is maintained at a rate of more than 16.6% growth, the annual output from 2001 annual growth of 37.35 million tons in 2007 to an annual output of 103.17 million tons, 6.42 million tons, an increase of 171.4% over 2001; expected annual output of 97.97 million tons in 2008. In the 22 varieties of steel by type of rebar is the largest proportion of the total amount of steel varieties, accounting for the total steel from 2001 to 23.8% in 2007 dropped to 15.9%, down 7.9 percentage points; the largest proportion Of the year is 2003, accounting for 25%, is a quarter of the total amount of steel. In recent years, the steel imports of steel is very small, steel exports are relatively large, and year by year rapid rise, but the net export volume of steel production ratio is very low

2. Wire diameter of 5-4mm hot rolled round steel and 10mm below the rebar, commonly known as wire. Most of the wire coil coil rolled into a coil supply, it is also known as wire rod or disk round,

Wire rods are mainly used for reinforced concrete reinforcement and welded structural parts or re-processing (such as dialing, development, etc.) raw materials. According to the distribution of steel catalog, wire, including ordinary low-carbon steel hot-rolled wire rod, wire rod, blasting line with wire rod, quenched and tempered wire rod, high-quality wire rod.