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  4. What are the types and uses of bars?...

What are the types and uses of bars?

What are the types and uses of bars?

Bar type:
The bar is a simple cross-section profile, which is usually delivered in straight bars. The variety of bars is divided into circular, square and hexagonal shapes and threaded steel bars for construction according to the cross-sectional shape. The latter is periodic cross-section profiles, sometimes called ribbed steel bars. The main shape of the cross-section of the bar is still round. Foreign countries generally believe that the cross-sectional diameter of the bar is Φ9 ~ 300mm. Domestically, it is conventionally recognized as: the product range of the bar workshop is a cross-sectional diameter of Φ10 ~ 50mm.
The shape of the cross section of the bar is simple, which is much larger than the general cross section of the wire rod, so the heat dissipation is slow, the rolling time is allowed to be long, the problem of large temperature difference between the head and tail is not prominent, but the upper limit product is easy to be insufficient. As with other hot rolling, in order to be able to roll products with high dimensional accuracy, it must be ensured that the heating is uniform and consistent, and the rigidity of the rolling mill is as high as possible. During the rolling, the cooling must be uniform. There are also changes in the pass shape caused by wear during rolling, which affect the long-term stability of rolling.
Bar use:
The modern national economy contains many sectors, such as industry, agriculture, transportation, construction, commerce, health, etc., which are all important components of the national economy. The metallurgical industry is an important part of modern industry. The metallurgical industry provides high-quality raw materials for the machinery manufacturing industry, and the machinery industry in turn can provide excellent machinery and equipment for other industries.
Bars are widely used in construction, machinery, automobiles, ships and other industrial fields, of which 70% are used for construction, and the rest are used for various shafts, bolts, nuts, anchor chains, springs and other materials. Therefore, the development of the steel industry has very important significance. China is a developing country and housing needs to be developed in large quantities. The demand for construction steel will be very high for a long time. In addition, with the improvement of people's living standards, the corresponding demand for automobile steel will also increase. In addition to the direct application of threaded steel bars in construction, a considerable part is processed into various shaft parts.

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