Corrosive agent used for preparing carbide in alloy steel, preparation method of corrosive agent and preparation method of carbide

Abstract

The invention relates to a corrosive agent used for preparing a carbide in alloy steel, a preparation method of the corrosive agent and a preparation method of the carbide, and belongs to the technical field of preparation of the carbide in steel. The corrosive agent used for preparing the carbide in the alloy steel is prepared from a surface active agent and the following raw materials of, by volume parts, 6-12 parts of hydrochloric acid, 1-5 parts of nitric acid and 1-3 parts of gluconic acid, wherein the mass ratio of the surface active agent to the hydrochloric acid is 0.5-2: 6.9-13.8. Thecorrosive agent used for preparing the carbide in the alloy steel is simple in composition, relatively stable and good in reproducibility, not only can effectively corrode steel substrates, but alsocan relieve corrosion of the carbide in the steel, and can achieve rapid preparation of the carbide in the alloy steel.

Description

technical field [0001] The invention relates to a corrosive agent for preparing carbides in alloy steel, a preparation method thereof, and a preparation method of carbides, belonging to the technical field of carbide preparations in steel. Background technique [0002] With the continuous advancement of industrial technology, molds are mainly developed in the direction of large-scale, complex, precise, high-life, and high-efficiency, which makes their service environment more and more harsh, and also puts forward higher performance requirements for mold steel. Studies have shown that fine, dispersed carbide particles play a decisive role in the high-temperature hardness, high-temperature strength, tempering stability, and thermal fatigue resistance of die steel, that is, the precipitated fine and dispersed carbide is the main strengthening phase of hot-work die steel. How to obtain the fine carbides and mass fraction in steel is one of the main ways to develop high-performan...

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Problems solved by technology

However, the preparation of carbides in steel by electrolytic extraction takes a long time to prepare, the operation is cumbersome, and the efficiency is low.

[0004] The Chinese invention patent with the application publication number CN101915773A discloses a method for non-destructive detection of the Laves phase of 9% Cr steel. The pH of the electrolyte solution is 3~4, the temperature is below +5°C, and the current density is controlled at 0.02~0.03cm 2 , electrolyze for 90-120min, collect the electrolyzed powder, rinse with distilled water and alcohol for 3 times until no chloride ions exist, and dry to obtain carbide. This method also has the problems of long electrolysis time, cumbersome steps and low efficiency.

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