Production of fast-drying water self-stripping metal heat treatment protecting coating

Abstract

A method for producing fast-dry water self-stripping metal heat-treatment protective coating is carried out by putting boric acid 40.0-70.0 wt%, water resin 25.0-50.0 wt%, titanium pigment slurry 1.0-15.0 wt%, coloring pigment slurry 0.1-10.0 wt%, de-foaming agent 0.1-2.0 wt% and de-ionized water residue into stainless steel jar, high-speed dispersing to fineness below 50mu by agitator, filtering and packing to obtain final product. The precision metal work pieces have excellent oxidation and de-carbonizing resistances with air as medium for physical heat treatment, and have excellent cementation, aluminizing, siliconing and chromizing resistances with chemical substances as medium for chemical heat treatment. It has brushing and spraying functions, fast dry speed and better adhesion.

Description

Technical field: [0001] The invention relates to the field of mechanical processing metal heat treatment protection, in particular to a preparation method of a quick-drying water-based self-stripping metal heat treatment protection coating. Background technique: [0002] The metal heat treatment process can be divided into physical heat treatment and chemical heat treatment. Physical heat treatment such as normalizing, quenching, and annealing is to achieve the mechanical properties required by the workpiece by changing the transformation of the metal crystal phase structure; chemical heat treatment is through other chemical elements such as carbon and nitrogen. , aluminum, silicon, sulfur, cyanide, etc., to change the chemical composition of the metal surface, and then undergo subsequent heat treatment to achieve special performance requirements such as mechanical properties, chemical properties, and process properties. Metal heat treatment is generally performed at a high ...

AI Technical Summary

Problems solved by technology

Metal heat treatment is generally performed at a high temperature of 400∽2000°C. If the metal is not protected during physical heat treatment, the metal will be decarburized and oxidized; during chemical heat treatment, if the part that does not need to penetrate elements is not protected, the metal parts will be scrapped.

[0003] The first way to solve the above problems is to protect the metal surface by copper plating, which has complicated procedures, high cost and is not environmentally friendly; the second is to coat the metal surface with a heat treatment protective coating

Generally, the existing protective coatings for metal heat treatment are mainly composed of glass, ceramics, and silicates, but these coatings are slow to dry and have poor adhesion to metals. Machining allowance, for precision machining, this type of coating is difficult to meet the requirements of machining accuracy

[0004] Metal heat treatment protective film such as the "Preparation Method of Metal Heat Treatment Protective Film" disclosed in Chinese Patent Application No. 85102501, its composition includes rubber, gasoline, benzene and boric acid, first make adhesive with rubber, gasoline or benzene, and then prepare protective film with boric acid film, which can wrap the protective film on the metal workpiece; although the metal protection effect of the protective film is good and it can fall off automatically, there are toxic or flammable solvents such as gasoline and benzene in the preparation, and it is not suitable for complex shapes. metal workpiece