A kind of hot-rolled plate and its preparation process

Abstract

The invention relates to a hot rolled plate and a preparation process thereof. The hot rolled plate comprises, by weight, 0.02-0.05% of C, 0.012-0.015% of N, 0.01-0.05% of S, less than or equal to 0.045% of P, less than or equal to 0.04% of Si, less than or equal to 0.025% of W, 0.05-1.3% of Mn, 0.01-0.05% of Al, 0.01-0.05% of Ti, 0.05-0.2% of RE, and the balance Fe and unavoidable impurities. The preparation process employs the method of combining sectionally continuous rolling with fast cooling after rolling, and the obtained plate has the advantages of high strength, high elongation, strong enamel coating adhesion, and good anti-fish scaling performance.

Description

technical field [0001] The present application relates to a hot-rolled plate and a preparation method thereof, in particular to a hot-rolled plate with high strength, high elongation, strong enamel coating adhesion, and good anti-scale explosion performance and a preparation method thereof. Background technique [0002] Enamel processing products are formed by forming a glassy enamel layer on the surface of a substrate made of metal materials such as steel and cast iron. become. [0003] The steel used for single-side enameling is common in the prior art, while the steel for double-side enameling requires that the steel plate can realize dense glaze and double-side enamelling. Compared with the high requirements for deep drawing performance of single-sided enameled steel, double-sided enameled steel pays more attention to the requirements of steel strength and enamel performance. [0004] The phenomenon of scale explosion is an important reason for the high reject rate of ...

AI Technical Summary

Problems solved by technology

[0007] The existing technology mainly has the following defects: (1) The amount of titanium added is always maintained at a relatively high level. Since titanium is a precious metal, the more titanium added, the higher the cost, and the high amount of titanium added, the titanium nitride The precipitation temperature increases, and the precipitated particles become coarser. Therefore, the enamelled steel with more titanium added is not only costly but also not conducive to improving the formability and surface quality of the steel plate.

(2) There are many studies on single-sided enamelled steel, focusing on the improvement of stamping performance, but often ignoring the improvement of compressive strength. It is difficult to directly apply the added elements of the anti-scale explosion performance of single-sided enameled steel to the improvement of double-sided enameled steel Zhonglai

(3) The hot rolling process is either relatively rough or too complicated, which reduces the production efficiency. At the same time, if a high rolling rate is used, the steel plate is easy to crack, thereby reducing the qualified rate