Hot-rolled enamel steel plate for subway decoration, and manufacturing method thereof

Abstract

The invention provides a hot-rolled enamel steel plate for subway decoration, and a manufacturing method thereof, wherein the chemical components comprise, by mass, 0.05-0.09% of C, 0.10-0.20% of Si,0.65-0.95% of Mn, less than or equal to 0.012% of P, less than or equal to 0.015% of S, 0.05-0.10% of Ti, 0.015-0.045% of Als, and 0.10-0.20% of Cr. According to the present invention, the casting billet soaking temperature is 1180-1250 DEG C, descaling is performed with high pressure water after the soaking, and coarse rolling is performed to obtain the intermediate billet; during the fine rolling, the rolling starting temperature is set at 980-1100 DEG C, and the finishing rolling temperature is set at 880-950 DEG C; and after laminar flow cooling, coiling is performed in a temperature rangeof 580-650 DEG C. According to the present invention, the enamel adhesion between the steel plate and the enamel can be increased, the steel plate cannot produce fish-scaling during enamelling, and the produced hot-rolled enamel steel plate has good comprehensive performance, has the yield strength of more than 390 MPa and the elongation after fracture of more than 40%, is suitable for rolling molding, bending molding and stamping molding, and can be stably produced through the continuous casting-hot rolling method.

Description

technical field [0001] The invention belongs to the technical field of metallurgical technology, and in particular relates to a hot-rolled enamel steel plate for subway decoration and a manufacturing method thereof. Background technique [0002] Our country is in a period of accelerated industrialization and urbanization. Millions of people are pouring into big cities, which brings huge pressure to urban traffic. The experience of the development of large cities in various countries in the world proves that only by using the large-capacity public transportation-subway as the backbone of urban transportation, can the traffic congestion be effectively alleviated and the efficiency of urban transportation improved. Therefore, the subway is the best choice to solve the traffic congestion in large cities . With the construction of subways in major cities, subway stations need a lot of decoration materials. Enamel steel plate is widely used because of its green environmental pro...

AI Technical Summary

Problems solved by technology

Application No. 201510398485.9 discloses "thin-plate enamel steel for subway decoration and its manufacturing method". Although the deep-drawing performance index of the steel plate is considered in the design, the C content is low (0.001-0.003%), which easily leads to the high-temperature enamel firing of the steel plate. Deformation, difficult to install and affect the appearance

In addition, the Ti content is too high (0.20-0.25%), which not only increases the cost, but also brings adverse effects on slab continuous casting

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