Apparatus and method for detecting fish-scaling resistance of steel for enamel based on principle of micro-differential pressure

Abstract

The invention relates to an apparatus and method for detecting fish-scaling resistance of steel for enamel based on principle of micro-differential pressure. A hydrogen evolution groove and a hydrogen diffusion groove are respectively arranged at the upper side and the lower side of a steel sample to be measured; a hole wall of the hydrogen diffusion groove is provided with a hydrogen diffusion liquid charging tube and a hydrogen diffusion liquid discharging tube; a thermometer is placed in the hydrogen evolution groove by a rubber stopper; a platinum electrode is placed in the hydrogen evolution groove through the rubber stopper, and the platinum electrode is connected to an anode of a DC constant-current constant-voltage instrument by a lead; the steel sample to be measured is connected to a cathode of the DC constant-current constant-voltage instrument by a lead; the hydrogen diffusion liquid discharging tube is connected to a micro-differential pressure sensor by a silica gel tube; the micro-differential pressure sensor is connected to a computer, and the computer connects a digital display touch screen. Computer data processing and the digital display touch screen are combined for facilitating instant inspection and storage of detection data, and visually displaying relation of hydrogen evolution quantity and time change.

Description

technical field [0001] The invention relates to a detection device and method for the anti-scale explosion performance of enamelled steel, in particular to a detection device and method using the principle of differential pressure. Background technique [0002] During the production of enamel products, hydrogen from the steel plate, enamel, enamelling process, etc. dissolves into the steel plate in the form of atoms and diffuses in the steel plate. Only a small part of the hydrogen is absorbed by the holes, gaps, and dislocations in the steel. , segregation, inclusions and other defects are trapped, most of the atomic hydrogen diffuses into the interface between the porcelain layer and the metal, and gathers in the form of hydrogen molecules. When the interface pressure formed by the accumulation of a large amount of hydrogen reaches the critical value of destroying the porcelain layer, it will It will cause scale bursts in the shape of crescent moon and fish scale on the su...

AI Technical Summary

Problems solved by technology

However, the problem with this method is that the liquid level detection device is expensive. In addition, the color depth of the colored liquid in the capillary and the light intensity will affect the accuracy of the grating sensor to capture the liquid level.

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