fine particle peening, introduction of Ultra Fine Shot and

A1

Shot peening improves fatigue strength, wear resistance, corrosion crack resistance, heat radiation, and lubricity, lowers fluid resistance, and has forming and sealing. Processing conditions need to be optimized according to desired benefits.

A2

Projecting methods (wheel blasting, air blasting, etc.), projecting time, coverage, throwing speed, abrasive flow rate, density, projection angle, processing temperature, etc. as to projection conditions. Material, specific gravity, hardness, size distribution as to abrasives. Material, hardness, resilience, size, shape, etc. as to work piece.

A3

Coverage is defined as the percentage of the total surface area covered by abrasive impacts; one of the barometers to show shot peening quality.

A4

Metal gets worn out with repeated stress. Accumulated fatigue leads to sudden breaking by even small stress. For safety and reliability of the products, fatigue strength needs to be improved. Molds with enough fatigue strength would reduce maintenance cost as well.

remarks

The harder workpiece material is, the more fatigue strength increases; however, too hard material makes processing difficult. Then, it would better to strengthen the material surface with compressive stress after processing "not-so-hard" material. Reinforcing the surface prevents micro cracks and compressive stress prevents the cracks from extending. The major methods include case hardening, induction hardening, and shot peening, and shot peening as cold working that uses no heat is cost-effective.

A5

3 factors;
1) Material (SCC is caused easily or not)
2) Stress (Tensile stress is caused repeatedly or not)
3) Environment (humid, hot, high-pressured)
Tensile stress is generated by metal processing such as welding, bending, etc. Compressive stress given by shot peening compensates and releases tensile stress to prevent SCC.

A6

Yes, our Test Center will take on the trials. Please let us know details on your workpiece such as material, shape, size, current challenges, etc.
Introduction of WINOA IKK JAPAN Test Center