Spring loss of performance or even damage

Die spring is a product of metal material. The performance of Datong spring is mainly determined by its own material. Generally, the performance of metal will produce fatigue under the action of alternating stress. When the fatigue value reaches its own limit, the performance will obviously drop directly, leading to damage.

Fatigue stress is the resistance of materials, parts and structures to fatigue failure.

The maximum alternating stress that the material can bear under the specified cyclic stress amplitude and a large number of repetitions. Fatigue failure is one of the main reasons for the failure of mechanical parts.

According to statistics, more than 80% of the failure of mechanical parts belong to fatigue failure, and there is no obvious deformation before fatigue failure, so fatigue failure often causes major accidents. Therefore, for shaft, gear, bearing, blade, Datong spring and other parts bearing alternating load, it is necessary to choose materials with better fatigue strength to manufacture.

Under the action of alternating stress, when the value of alternating stress is much lower than the yield strength of the material, the metal will also be damaged after a long time of operation, which is called fatigue failure.

When the load is higher than the fatigue strength, fatigue failure will occur. Or in the case of continuous plastic deformation will also produce fatigue. Under the condition of dynamic load, especially in the case of plate internal defects, this situation is more frequent in general welding parts.

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