Macrostructure hot acid etching device

Abstract

The invention discloses a macrostructure hot acid etching device which comprises an acid etching tank, a workpiece cleaning pool, an acid etching liquid supply device and a microwave heating device for heating acid etching liquid in the acid etching liquid supply device, and the acid etching liquid supply device is communicated with the acid etching tank. A microwave heating mode is adopted, so that the heating device is prevented from direct contact with the acid etching liquid, and the purpose of safely and reliably heating the acid etching liquid is achieved; microwave heating is high in temperature rising speed and heating efficiency, energy loss can be greatly reduced, and the production cost is reduced; the microwave heating device, the acid etching liquid supply device and the acidetching tank are all independent equipment units, and electrified elements and circuits are not in direct contact with acid etching liquid and cannot be corroded by the acid etching liquid. The acid etching liquid in the acid etching tank is not directly heated by microwaves, but flows into the acid etching tank after being heated by the acid etching liquid supply device, so that the potential hazard that a workpiece of the conventional equipment is possibly exploded due to direct contact with the heated acid etching liquid is solved, and the safety is high.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a low-magnification tissue thermal acid etching device. Background technique [0002] In the process of smelting, casting, forging and heat treatment of metal materials, affected by technological processes and environmental factors, various defects will inevitably occur on the surface or inside of the metal, which will affect product quality and performance. As a commonly used metal material, the common defects of steel, such as shrinkage cavities, hot working cracks, porosity, segregation and non-metallic inclusions, can be evaluated by macroscopic structure inspection. [0003] Low magnification macrostructure inspection of steel is an inspection method for inspecting its macrostructure and defects by visual inspection or a magnifying glass of no more than 10 times. The low magnification structure is an important content to reflect the quality of the steel, and the un...

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Problems solved by technology

Electric heating generally uses resistance rods to directly contact and heat the acid liquid or an electric furnace to heat the acid container. The disadvantages are: 1) The heating speed is slow and uneven, 2) The safety is poor, and the heating components are directly exposed to high temperature and strong corrosion On the one hand, the heating components are easily corroded, and there is a risk of electric leakage and short circuit; on the other hand, the acid etching liquid in the acid etching tank is directly heated, which is easy to generate acid mist. When the acid mist reaches a certain concentration, There is a risk of explosion. 3) The equipment cost is high. Generally, materials with good thermal conductivity are not acid-resistant, and acid-resistant materials have poor thermal conductivity. Although quartz gl

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