Application of zinc impregnation technology in rail suspension steel spring

Abstract

The invention discloses application of zinc impregnation technology in a rail suspension steel spring. The zinc impregnation technology is applied to the rail suspension steel spring, and the spring manufacturing process is strictly controlled, namely the coverage rate of the shot-blasting surface treatment is strictly controlled to be 100 percent, and due to control of the spring temper temperature and zinc impregnation temperature, the upper limit of the zinc impregnation temperature is less than the lower limit of the temper temperature. The technology is applicable to anti-corrosion protection of the railway locomotive vehicle suspension steel spring, particularly springs operated in high-humidity or / and salt atmosphere special environmental areas. The zinc impregnation coating has high corrosion resistance and high adhesion force and impact resistance and does not influence the service life of the spring. The thickness of the powder zinc impregnation is controlled to be 10-110 mu m, and the error is 10 percent; the impregnation layer is uniform and good in continuity; the diffusion alloys are combined, and the bonding strength is high; and the technology has HV22-245 and is basically pollution-free.

Description

technical field [0001] The invention belongs to the spring surface anticorrosion treatment technology, and in particular relates to the application of a zinc shedding technology to railway suspension steel springs. Background technique [0002] Railway rolling stock suspension steel springs, especially steel springs operating in special environmental areas. The special environment area mentioned here refers to the high humidity or / and salt fog atmosphere, which belongs to the environment along the eastern coast of my country and most of the south. For railway rolling stock operating in special environments, the suspension steel springs will accelerate corrosion, and severe corrosion will accelerate spring failure. In addition to accelerated corrosion of railway springs in high humidity or / and salt spray atmospheres, ballast stones splash up and hit the springs, scratching the paint coating is also one of the reasons for accelerated corrosion. This requires the application ...

AI Technical Summary

Problems solved by technology

For railway rolling stock operating in special environments, the suspension steel springs will accelerate corrosion, and severe corrosion will accelerate spring failure

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