Low-cost third-generation automobile steel processing technology

Abstract

The invention discloses a low-cost third-generation automobile steel processing technology. The low-cost third-generation automobile steel processing technology comprises the following steps of carrying out smelting and casting, specifically, placing a medium manganese steel raw material in a vacuum induction furnace for smelting and casting so as to obtain a blank; carrying out hot rolling, specifically, placing the blank in a double-roller hot rolling mill for rolling so as to obtain a hot-rolled blank; carrying out acid pickling, specifically, placing the hot-rolled blank in acid liquor to be washed to be bright white, then washing the acid liquor on the surface of the hot-rolled blank clean with water and blow-drying the surface of the hot-rolled blank, and finally carrying out oiling treatment to obtain an acid-pickled blank; carrying out cold rolling, specifically, carrying out cold rolling on the acid-pickled blank through a straight-pull type four-roller reversible cold rolling mill so as to obtain cold-rolled third-generation automobile steel; and carrying out annealing, specifically, annealing the cold-rolled third-generation automobile steel so as to obtain the low-cost third-generation automobile steel. The third-generation automobile steel produced through the processing technology has the advantages of being low in cost, good in plasticity, good in forming performance, high in product of strength and elongation and the like, it is guaranteed that forming is facilitated while the mechanical property is not reduced, the whole processing technology is simple in process, and the production difficulty is low.

Description

technical field [0001] The invention relates to the technical field of high-strength automobile steel. Specifically, it is a low-cost third-generation automotive steel processing technology. Background technique [0002] At present, most of the first-generation automotive steels are on the market, and the strength and plasticity of the first-generation automotive steels are about 10-20GPa·%. Such as IF steel, CP steel, DP steel, etc., the structure is mostly ferrite and martensite, and may contain a small amount of austenite structure. The product demand is mainly realized by adjusting the ratio of martensite and ferrite. Although the cost of the first generation of automotive steel is relatively low, its strength and plasticity are relatively low, which cannot meet the requirements of crash safety. At the same time, the BCC structure of the first generation of automobile steel has poor formability due to less slip systems and poor plasticity. Therefore, many scholars stu...

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Problems solved by technology

[0003] For this reason, the technical problem to be solved by the present invention is to provide a low-cost third-generation automobile steel processing technology to solve the problems of the current first-generation automobile steel with low strength-plastic product, poor plasticity, poor formability and the second-generation automobile steel. To solve the problem of high cost, provide a low-cost third-generation automotive steel that is easy to form while ensuring that the mechanical properties do not decrease, and can meet the actual safety requirements while reducing the difficulty of actual production

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