Steel strip for thin-wall oil bucket and manufacturing method thereof

Abstract

The invention discloses a steel strip for a thin-wall oil bucket and a manufacturing method thereof. The manufacturing method comprises the following steps: casting a crystal roller from a cast strip by using a thin strip casting process, subsequently uniformly reinforcing and cooling the cast strip in a mode that dry ice is sprayed at a high pressure, and rapidly cooling the cast strip to be less than 1,280 DEG C, wherein the cooling velocity is 200-300 DEG C / s; when the steel strip is subjected to boron treatment in such a mode, large boron nitride separation is prompted, occurrence of low-melting-point phase B2O3 and separation of fine AlN are prevented, and the purposes of uniformly austenite grains and reducing the yield ratio are achieved; subsequently performing on-line recrystallization and rolling on the austenite; subsequently atomizing and cooling so as to cool down the hot-rolled steel strip; finally coiling the steel strip. By adopting the manufacturing method, the thin-wall with low yield ratio and excellent stamping property for the thin-wall oil bucket is manufactured. The hot-rolled steel strip for the thin-wall oil bucket can be used in hotness instead of coldness, and a cold-rolling procedure is omitted, so that the production cost is greatly lowered.

Description

technical field [0001] The invention relates to a continuous casting process, in particular to a thin steel strip for thin-walled oil barrels and a manufacturing method thereof. Background technique [0002] In the traditional steel production process, tin (Sn) is a typical residual element or harmful element in steel. It is very difficult and expensive to fully remove Sn in the steelmaking process. Once Sn is contained in steel, it is basically impossible to completely eliminate it. , can only reduce the content of Sn by diluting molten steel, all of which lead to the increase of the cost of steel products. [0003] In recent years, due to the continuous recycling of scrap steel, the content of residual elements such as Sn in steel has gradually increased. Sn in steel is an element that is easy to segregate, and it is easy to be enriched at the grain boundary to cause defects such as cracks. Therefore, in the traditional process The content of Sn element in steel is strict...

AI Technical Summary

Problems solved by technology

When thin strip continuous casting produces this kind of steel, it can solve the problems of uneven structure, low elongation, high yield strength ratio and poor formability in the thin strip continuous casting process, and meets the needs of bending forming and stamping forming. and other use requirements, so as to meet the use requirements of cold-rolled base materials and "replacing cold with heat" products

Images