Metallographic detection device and metallographic detection method for corrosion-resistant iron matrix welded joint

Abstract

The invention relates to a metallographic detection device and a metallographic detection method for a corrosion-resistant iron matrix welded joint. The device comprises an electrolysis box and a pulse power supply. The pulse power supply is arranged outside the electrolysis box, and the electrolysis box is used for containing electrolyte; the electrolysis box is a closed container made of organicglass, a box cover capable of being opened or closed is arranged at the top of the electrolysis box, a graphite rod is installed on the inner side wall of one side of the electrolysis box, a test piece clamp is installed on the inner side wall of the other side of the electrolysis box, and the graphite rod and a test piece clamp are connected with a pulse power supply through wires connected withthe graphite rod and the test piece clamp respectively to form an electrolysis loop; a liquid injection port is formed above the side, provided with the graphite rod, of the top of the electrolysis box, a liquid outlet connector is formed below the side, provided with a test piece clamp, of the bottom of the electrolysis box, and a switch valve or a detachable blocking piece is installed at the position of the liquid outlet connector. According to the invention, the test operation is facilitated, and the test safety is improved.

Description

technical field [0001] The invention belongs to the field of metallographic detection of metal materials, and in particular relates to a metallographic detection device and detection method of a corrosion-resistant iron matrix welded joint. Background technique [0002] Common corrosion-resistant metal materials in the power industry include stainless steel, duplex stainless steel, and nickel-based alloys. Because of its good corrosion resistance, it is widely used in power engineering and so on. [0003] Macroscopic metallographic test is an important item for evaluating welding procedures of corrosion-resistant alloy materials. Analyze and evaluate the welding shape, deposition effect and welding defects of the welded joint through the macroscopic metallographic appearance to determine whether the selected welding parameters are appropriate, and apply the appropriate welding parameters to the actual welding work on site. [0004] At present, the metallographic inspection...

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Problems solved by technology

[0007] 3. There is no special experimental equipment and the operation is complicated;

[0008] 4. The existing corrosion solution has poor corrosion effect and cannot form a clearly visible metallographic morphology;

[0009] 5. Poor conventional cleaning effect;

[0010] 6. The electrolysis process of ordinary DC power supply is slow

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