Spring knowledge: What is the cause of abnormal spring fracture?

It is one of the important basic components in mechanical products. There are many varieties of it, divided by appearance: spiral spring, plate (plate) spring, disc spring, ring spring, flat (truncated cone) snail coil spring, etc; According to the load-bearing characteristics, it can be divided into: compression, tension, changing springs, etc.
The stress borne by springs mainly includes bending stress, changing stress, tensile and compressive stress, and composite stress.
The main failure modes of springs are: fracture, deformation, looseness, and wear. The main analysis is fracture and deformation (relaxation).
1. Brittle fracture: The vast majority of Wire Spring fractures belong to brittle fracture. Plastic fracture is only possible when the working temperature is high. Fatigue fracture, stress corrosion fracture, and hydrogen embrittlement fracture are referred to as brittle fracture in engineering.
2. Fatigue fracture: The fracture of a spring under cyclic loading.
3. Stress corrosion fracture: Under the combined action of tensile stress and corrosive media, spring fracture occurs.
4. Corrosion fatigue fracture: The fracture of a Battery Spring under the combined action of cyclic load and corrosive medium.
5. Hydrogen embrittlement, cadmium embrittlement, and black embrittlement: embrittlement caused by excessive impurity content in spring data.
6. Wear: Wear is divided into: abrasive, fatigue, and corrosive wear fracture.