Production device of high-strength fine-grain hot rolled ribbed steel bars and production process thereof

Abstract

The invention discloses a production device of high-strength fine-grain hot rolled ribbed steel bars, which comprises a blank pretreatment unit, a low-temperature isothermal fast rolling unit and a finished product treatment unit, wherein the number of the low-temperature isothermal fast rolling unit is at least 1, the production device comprises a continuous rolling machine set and a head-shedding, thermal insulation and heat compensation roller way device arranged after the continuous rolling machine set, the continuous rolling machine set is used for performing low-temperature isothermal fast large-deformation rolling on a rolled piece by the low-temperature isothermal fast rolling unit, then the head-shedding, thermal insulation and heat compensation roller way device is used for thermal insulation and heat compensation, temperature control large-deformation rolling can be continuously performed according to needs, and the temperature of the whole rolling process is controlled at 750-950 DEG C. Not only continuous casting and direct heat transfer rolling can be realized, and energy consumption can be reduced, but also low-temperature isothermal rolling, temperature control rolling and large-deformation rolling can be realized, crystal grains are further fined, and the product performances are improved. In addition, through temperature control cooling, cooling recovery and other means, rolling temperature of the rolled piece in all the units can be controlled, the uniform temperature of the cross section of the rolled piece is ensured, and the fining of the grains is also ensured.

Description

Technical field [0001] The invention relates to the field of rolling equipment and processes, in particular to a rolling equipment and process of ribbed steel bars. Background technique [0002] In recent years, large-scale infrastructure construction and urbanization have caused a sharp increase in the market demand for construction steel. Among them, hot-rolled ribbed steel bars are the most in demand type of construction steel. Due to strong market demand, the annual output of hot-rolled ribbed steel bars continues to grow. [0003] It is well known that steel production consumes a lot of resources and energy, and has a huge impact on the ecological environment. Under the current increasingly stringent requirements for resources, energy and environment, the contradiction between reducing production energy consumption and improving steel performance has become more and more prominent. [0004] Hot delivery (supplementary heating) rolling, hot delivery hot charging rolling, low t...

AI Technical Summary

Problems solved by technology

However, in the prior art, there has not been a high-strength fine-grained material that can save energy consumption, reduce labor, and reduce production costs, and can produce high-strength fine-grained materials with high strength, good ductility, and good weldability. Process equipment for hot-rolled ribbed steel bars

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