Suzhou spring: Methods to avoid spring corrosion damage

Suzhou spring: Methods to avoid spring corrosion damage

During the use of the spring, it is necessary to taste the corrosion of harmful gases and work under the condition of corrosion fatigue, which constitutes a local corrosion damage on the surface of the steel wire to form a stress concentration, and gradually expand the corrosion fatigue crack. Oxidation treatment can make the shell hook spring have certain corrosion resistance.

After oxidation treatment, the hook spring can form a fine oxide film on the surface of the steel wire, which can avoid the corrosion effect of gunpowder gas.

Oxidation treatment can reduce the friction effect of the hook spring. In the shooting process, the hook spring is repeatedly stretched and tightened in the spring chamber, and at the same time, it forms friction with the spring chamber and will generate friction heat, which is also one of the reasons for the early failure of the shell hook spring.

After the hook spring is oxidized, the small pores of the oxide film can store oil, which can have a smooth effect on the spring; The thermal conductivity of the oxide film is much lower than that of the shell hook spring wire, which has better thermal protection effect and is also conducive to avoiding the early failure of the shell hook spring.

After the spring is oxidized, after 40 times of life tests, the shell hook spring does not crack. Practice has proved that oxidation treatment of shell hook spring can improve its service life.