Steel part surface oxidation process

Abstract

The invention provides a steel part surface oxidation process comprising the following steps: (1) mechanically grinding the surface of a steel part to remove rust; (2) sandblasting the steel part; (3) soaking the treated steel part in an oxidant aqueous solution for 10-30 minutes; (4) taking out the steel part and air drying the steel part; (5) heating the steel part in natural environment, and immediately stopping heating when the color of the steel part starts to become blue; (6) naturally cooling the steel part, and soaking the steel part in anti-rust oil after the steel part is cold, the oxidant in the oxidant aqueous solution is potassium permanganate, the mass percent of potassium permanganate in the solution is 5-10%, and the heating temperature of the steel part is 500-600 DEG C. The steel part surface oxidation process provided by the invention has the beneficial effects that the process is simple to operate, the produced oxidation film is complete, the thickness of the oxidation film is quite uniform, and the bluing process is faster, so that the steel part surface oxidation process is easy to popularize.

Description

technical field [0001] The invention relates to a steel surface oxidation process. Background technique [0002] The rust on the surface of steel parts is a brittle and porous substance, which cannot protect the inner metal iron from rust. The process of forming a dense and complete oxide film with certain mechanical strength on the surface of steel parts by chemical or electrochemical treatment is called the coloring of steel. A certain thickness of oxide film is formed on the surface of steel products after coloring treatment, presenting a special oxidation color - blue-black, which is usually called blue or black of steel products. [0003] There are many methods for oxidation treatment of steel parts, such as commutation oxidation method, alkali-free oxidation method, high temperature gas oxidation method and spot oxidation method. [0004] The bluing of steel parts is often used for protective decoration of machinery, precision instruments, meters, weapons, daily nece...

AI Technical Summary

Problems solved by technology

[0005] The traditional bluing method is to directly heat the workpiece, so that the steel piece completes the bluing process in the air, the metal oxide film cannot be controlled uniformly, and the bluing effect is not good, and a complete oxide film cannot be produced, so an improvement is urgently needed technology to solve the above technical deficiencies