High-strength tin-plated bronze tire bead steel wire and preparation method thereof

Abstract

The invention discloses a high-strength tin-plated bronze tire bead steel wire which comprises a steel wire base body. The surface of the steel wire base body is provided with at least two plating layers, tin content of the plating layers is reduced layer by layer from inside to outside, tin content of the plating layer closely attached to the surface of the steel wire base body is high, the adhesive force between the plating layer and the steel wire base body is high, and the plating layer which is high in tin content can effectively prevent the steel wire base body from being rusted. The plating layers with the tin content gradually reduced from inside to outside are closely combined with each other, and a high adhesive force exists between the outermost plating layer with the relatively lowest tin content and tire rubber. Accordingly, the tire bead steel wire in the technical scheme can guarantee that the steel wire base body in the plating layers is not rusted, the high adhesive force between the tire bead steel wire and the tire rubber can be guaranteed, a tire can bear acting force such as high-strength stretching, compression, twisting and centrifugation during the automobile running process, and safety of automobile running is guaranteed.

Description

technical field [0001] The present invention relates to a steel wire, in particular to a bead steel wire, and also to a manufacturing method of the bead steel wire. Background technique [0002] With the development of lightweight and high-speed automobiles, radial tires, as an important part of automobiles, have been rapidly applied and developed due to their advantages of high speed, energy saving, light weight, and long mileage. Radial tires are subject to tension, compression, torsion, and centrifugal forces during use. As one of the skeleton materials, the quality of the bead wire directly affects the quality of the tire. The bead wire commonly used today is a tin-plated bronze wire used to reinforce the rim of the tire. The tire is a wire ring made of bead wire and isolation rubber, so that the tire is tightly fixed on the rim. [0003] When the car is running, the bead and bead edge of the tire are very stressed. If the bonding force between the bead wire and the ti...

AI Technical Summary

Problems solved by technology

However, low-tin bronze is used as the cathodic coating of steel wire. Once rust occurs, the low-tin bronze will not be corroded and the steel wire substrate will be corroded rapidly. The coating will lose its protective effect on the steel wire substrate, and the low-tin bronze will peel off from the steel wire substrate. It is difficult to withstand the tension, compression, torsion and centrifugal forces generated during the driving process of the car, which can easily cause the bead to loosen and cause the tire to burst and cause a traffic accident

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