Hot-rolled fine-grained steel for electrostatic enamel and manufacturing method thereof

Abstract

The invention discloses a preparing method of electrostatic enamel hot-roller fine-grained steel, which is characterized by the following: allocating mass percent as 0. 02-0. 10 carbon, not more than 0. 10 silicon, 0. 4-1. 0 manganese, not more than 0. 05 phosphor, 0. 02-0. 05 sulfur, 0. 01-0. 10 aluminum, 0. 003-0. 010 nitrogen, 0. 03-0. 10 titanium, surplus ferric and unavoidable impurity; setting the content of TiN at 0. 013-0. 044; setting ferrite tissue grain fineness number not less than 10 grade. This invention possesses good enamel adherence property and against squama knock property.

Description

technical field [0001] The present invention relates to hot-rolled fine grain steel for electrostatic enamel and its manufacturing method. Background technique [0002] When producing pressure-resistant containers such as water heater inner tanks, they were mainly manufactured by wet enamel processes in the past. In wet enamel, the adhesion between the enamel and the steel plate is relatively good, so the key point is to solve the scale resistance of the steel plate, because the enamel of wet enamel contains high crystal water, which is easy to generate hydrogen during the enamel process. Scales burst. There are many related patents for wet enamelled steel plates (see Table 1 and Table 2 for details). [0003] In these patents, in order to improve the scale explosion resistance of the steel plate, very high alloying elements (such as titanium and boron, etc.) are usually added to the steel to form sufficient compounds in the steel, which can effectively absorb the corrosio...

AI Technical Summary

Problems solved by technology

It is a method of dry powder enamel and then sintering, and its main defects are scale explosion and poor adhesion

But generally speaking, the bonding force between the porcelain powder and the steel plate, that is, the adhesion, is not as good as that of the wet enamel. In this way, the enamel peels off due to poor adhesion, resulting in the scrapping of the enamel products, and the loss will be very serious.