High-strength glass lining steel with excellent fish scaling resistance and manufacturing method thereof

Abstract

The invention discloses high-strength glass lining steel with excellent fish scaling resistance. The high-strength glass lining steel comprises the following chemical elements of, in percentage by mass, 0.08%-0.20% of C, 0.15%-0.30% of Si, 0.8%-1.5% of Mn, 0.002%-0.035% of S, 0.015%-0.06% of Al, 0.002%-0.010% of N, 0.10%-0.25% of Ti, 0.001%-0.030% of Nb, at least one of 0.01%-0.20% of Cu, 0.01-0.20% of Cr, more than 0 and less than or equal to 0.10% of Ni, and more than 0 and less than or equal to 0.10% of Mo, and the balance Fe and other inevitable impurity elements. A microstructure matrix of the high-strength glass lining steel is ferrite plus pearlite, the pearlite is uniformly and dispersedly distributed in the matrix, and the strip-shaped pearlite does not exist. In addition, the invention further discloses a manufacturing method of the high-strength glass lining steel with excellent fish scaling resistance. The manufacturing method comprises the following steps of (1) smelting and casting; (2) hot rolling; and (3) cooling after rolling. The high-strength glass lining steel with excellent fish scaling resistance has relatively high strength and excellent fish scaling resistance.

Description

technical field [0001] The invention relates to a steel and its manufacturing method, in particular to a glass-lined steel and its manufacturing method. Background technique [0002] The glass lining process is to coat the vitreous glaze containing high silica components on the surface of the steel substrate, and then after high-temperature sintering, the vitreous glaze is firmly attached to the surface of the steel substrate to form a composite material. Glass-lined equipment made of glass-lined technology, such as glass-lined reactors and glass-lined storage tanks, has the dual advantages of the stability of glass and the strength and toughness of metal, and has good strength, rigidity, wear resistance and corrosion resistance. It is mainly used in petrochemical, pharmaceutical, pesticide, food and other industries. [0003] Steel plate is one of the key materials for making glass-lined equipment. It not only determines the strength and toughness of the overall structure,...

AI Technical Summary

Problems solved by technology

Generally, the higher the pearlite content, the higher the firing temperature or the longer the firing time, the more bubbles will be generated, and it is very easy to form too large and too many bubbles in the porcelain layer, resulting in poor bubble structure and surface bubble defects. Etc., damage the quality of the porcelain layer

On the other hand, after repeated heating and cooling processes, the decomposition and transformation of pearlite (solid-state phase transition) frequently occur, which easily causes deformation of the steel plate body and affects the quality of glass-lined equipment and its accessories.

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