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6. Glossary
Indice d'enroulement; spring index
Ratio between the average winding diameter of a helix and the wire diameter.
Characteristic; load-length characteristic
Law linking axial force to deflection.
Shot peening; shot peening
The process of violently striking the metal surface with a multitude of small balls to generate residual compressive stresses favorable to the fatigue life of the part.
Pre-training; pre-setting
Pre-forming involves deliberately working the spring beyond its elastic limit (usually in 2 or 3 stages), before putting it into operation on the system, to obtain a given state of residual stress. As a result of plastic deformation, the spring's dimensions will differ from those of the initial shaping....
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Bibliography
Standards and norms
- Heat treatment, alloy and free-cutting steels – part I: unalloyed steels for quenching and tempering. - NF EN ISO 683-1 - Juin 2018
- Heat treatment, alloy and free-cutting steels – Part 2: alloy steels for quenching and tempering. - NF EN ISO 683-2 - Juin 2018
- Heat treatment, alloy and free-cutting steels – Part 3: case-hardening steels. - NF EN ISO 683-3 - Février 2022
- Hot-rolled steels for quenched...
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