Preparation method for steel plate

Abstract

The invention relates to a preparation method for a steel plate, which belongs to the technical field of metal plate preparation. The preparation method comprises the following steps of: firstly, adding raw material into a smelting container; heating steel leftover materials in the smelting container to the steel smelting temperature; in an air-pressure or self-weight mode, steel solution in the smelting container drips down from a small hole on the bottom of the smelting container to overlay and cover the steel solution on a plate blank; at the same time that the steel solution is overlaid and covered on the plate blank, a steel metal layer is subjected to thermal mechanical processing while being overlaid and covered; the crystal grain of the overlaid and covered steel metal layer tissue is refined to obtain a prefabricated steel plate blank of a fine grain tissue; and the prefabricated steel plate blank is subjected to machining to obtain the steel plate. The method disclosed by the invention has a low requirement on the raw materials, the raw materials can be abandoned materials, such as steel leftover materials, bar stocks, plate materials and the like, and therefore the production cost is greatly lowered. The technical process is greatly shortened, the production efficiency is greatly improved, and the fine grain steel plates of various ingredients, sizes and shapes can be prepared.

Description

technical field [0001] The invention relates to a method for preparing a steel plate, which belongs to the technical field of metal plate preparation. Background technique [0002] Up to now, the mass production of steel plates is mainly realized through the traditional hot rolling and cold rolling processes. [0003] The traditional hot rolling process is briefly as follows: continuous casting + slab reheating and heat preservation + rough rolling + finish rolling + cooling (or + coiling). Firstly, slabs are obtained through electric furnace or converter smelting and continuous casting; after reheating and heat preservation, the slabs are subjected to rough rolling and finish rolling to obtain steel plates of different thicknesses. Continuing to cold-roll traditional hot-rolled products can further reduce the thickness of the steel plate and obtain thinner cold-rolled steel plate products. [0004] Using the above-mentioned traditional hot-rolling or cold-rolling process ...

AI Technical Summary

Problems solved by technology

[0006] However, the thin strip continuous casting process still has some problems in the production of the traditional hot rolling process, such as: the microalloying elements cannot be maintained as a solid solution during the hot rolling process, and partial precipitation occurs, resulting in an increase in the strength of the steel, thereby increasing the rolling capacity. load, increase energy consumption and roll consumption, so that the thickness of hot-rolled products that can be produced economically and practically cannot be too thin, it should be ≥ 1.5mm; obtain ultra-fine microstructure to obtain ultra-high strength During the rolling process of fine-grained plates, the capacity of the rolling equipment is high and the damage is large; the size of the prepared steel plate is limited by the capacity of the subsequent rolling equipment, etc.