Rolling technology of microalloy V-N steel

Abstract

The invention discloses a rolling technology of microalloy V-N steel. The austenitizing temperature ranges from 1200 DEG C to 1300 DEG C, and heat preservation time is 600s; the finish rolling temperature ranges from 900 DEG C to 950 DEG C; and the rolling deformation amount is controlled to range 30 percent to 40 percent, and air cooling is adopted after rolling. According to the rolling technology, the structure and the performance of the microalloy V-N steel are obviously improved.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to a microalloy V-N steel rolling process. [0003] Background technique [0004] Vanadium and nitrogen micro-alloyed low-carbon steel plate can obtain fine grain and high strength by adopting controlled rolling and controlled cooling process, which has been highly valued by the metallurgical industry in various countries, and is called the third generation of grain refinement. Because the fine vanadium nitride particles precipitated during the rolling process in the high-temperature austenite zone can refine the grains and promote the formation of intragranular ferrite, so the rolling temperature can be greatly increased and the rolling efficiency can be improved. It has been used in medium-thick Plate rolling production. However, there is no specific value for the specific rolling process parameters, and there is no basis for production. [0005] Cont...

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Problems solved by technology

However, there is no specific value for the specific rolling process parameters, and there is no basis for production