What is ISO 12686 - Shot-peening of metallic articles about?
ISO 12686 is an International Standard that describes the requirements for automated, controlled shot-peening of metallic articles prior to electrolytic or autocatalytic deposition of nickel or chromium, or as a final finish, using a shot made of cast steel, conditioned cut wire, ceramic shot, or glass beads. The process is applicable to those materials on which test work has shown it to be beneficial within given intensity ranges. It is usually not suitable for brittle materials. Hand peening and rotary flap-peening are specifically excluded.
Shot-peening induces residual compressive stresses in the surface and near-surface layers of metallic articles and changes the surface microstructure (including phase transformation), thereby controlling or limiting the reduction in fatigue properties that occurs from nickel or chromium plating of the article or increasing the fatigue properties of unplated articles.
Who is ISO 12686 - Shot-peening of metallic articles for?
ISO 12686 on automated controlled shot-peening of metallic articles is useful for:
- Metallic coating manufacturers
- Product design engineers
- Quality control and testing personnel
- Mechanical engineers
Why should you use ISO 12686 - Shot-peening of metallic articles?
Shot-peening is a process for cold-working surfaces by bombarding the product with shot of a solid and spherical nature propelled at a relatively high velocity. In general, shot peening can increase fatigue life of a product that is subject to bending or torsional stress. It can improve resistance to stress-corrosion cracking. It can be used to form parts or correct their shapes.
It is essential that the shot-peening process parameters be rigidly controlled to ensure repeatability from part to part and lot to lot.
ISO 12686 describes techniques and methods necessary for proper control of the shot peening process.
ISO 12686 provides you with the apparatus, reagents, test specimen preparation, test vessel equilibration, examination, and evaluation of specimens for shot-peening of metallic articles before metallic coating.
ISO 12686 also gives a recommended peening intensity relative to cross-sectional thickness and strength of the steel.
ISO 12686 also covers freedom from iron contamination test that can help detect contamination by iron residues on the surfaces of aluminium and its alloys, corrosion resistant and heat resistant alloys, etc.
Overall, ISO 12686 is your one-stop guide on automated controlled shot-peening of metallic articles to enhance the service life and performance of the metallic substrates. As a result, concerns of fatigue strength and crack propagation can be addressed
