HS alloy steel high sulfur alloy steel bushing bearing skateboard wear resistant rare earth HS high sulfur alloy

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1. Physical and mechanical properties of HS alloy bushings

1) Linear expansion coefficient: a = 8.96 × 10-6 / c0

2) Friction coefficient: f = 0.1 (initial) ~ 0.05 (after operation)

3) Allowable speed: [v] = 6m/s

4) Allowable specific pressure: [p] = 30-45mpa

5) Allowable (pv) value: [pv] ≥ 25~30mpa.m/s

6) Hardness: hb = 140~560 (after heat treatment)

2, the advantages of hs alloy bushing

1) Large carrying capacity

The bushing made of hs alloy has no cage and rolling elements, so its bearing capacity is large, which is more than 15% higher than that of ordinary bushings.

2) Excellent self-lubricating ability and anti-seizure ability

There are various alloy compounds and 0.5~11% free sulfur in the hs alloy. When the rotating (sliding) friction starts, the friction surface will quickly release a variety of solid adhesives with lubrication, fill the micro-pits of the two friction surfaces, and form a stable solid lubricating film on both surfaces. It acts as a lubricant to eliminate occlusion.

3) Outstanding high temperature performance

The hs alloy can work reliably and long-term at 800 ° C without lubrication and cooling. If you work in a medium and low temperature environment, the life will be longer.

4) Small friction coefficient

After repeated tests and use, the initial rotation (sliding) of the hs alloy is not as good as that of the self-lubricating material. The friction coefficient is similar to that of ordinary steel, but as the rotation (sliding) time increases, a variety of lubrication is released. A solid metal bond forms a lubricating film with a smaller coefficient of friction. f = 0.1~0.05

5) High running line speed

The hs alloy bushing can work smoothly for a long time at v<6m/s, especially at low speeds.