_239a2f9f-b968-43f7-9ab6-c2c6464aed44.png){kind=small}
DOWA THERMOTECH (THAILAND) CO., LTD.
PRODUCT
Production Goods
What is Shot Peening?｜How Surface Stress Improves Fatigue Strength and Component Life
Shot peening is a surface treatment that increases fatigue strength and prevents cracking in metal parts by introducing residual compressive stress. This proven method is essential in industries like aerospace, automotive, and precision tooling.
What is Shot Peening?
Shot peening is a mechanical surface treatment that propels small spherical particles (steel, ceramic, or glass beads) at high velocity onto a metal surface. The controlled impact creates residual compressive stress, which counters operational tensile stress and significantly reduces fatigue cracking.
Benefits include:
- Improved fatigue life and resistance to crack initiation
- Enhanced wear resistance
- Increased reliability of components under cyclic loads
It is widely used in:
- Aerospace (turbine blades, landing gear)
- Automotive (crankshafts, springs, camshafts)
- Precision equipment and medical implants
How It Works
1. Media Propulsion: Shot media are blasted using either compressed air (Nozzle Type) or centrifugal wheels (Impeller Type).
2. Surface Deformation: Each particle impact plastically deforms the surface layer.
3. Compressive Stress Layer: This process induces a uniform compressive stress field, shielding the part from crack propagation.
Properly executed, shot peening can extend part life 1.5 to 2 times while supporting lighter, compact designs.
Key Applications and Benefits
Aerospace:
Turbine blades, landing gear, and rotating components benefit from extended fatigue life and damage resistance.
Automotive:
Used on camshafts, gears, springs, and crankshafts to resist vibration fatigue and wear.
Tooling & Precision Equipment:
Surgical tools and micromechanical parts gain surface hardening and residual stress control for high-precision use.
Process Control Factors
To ensure consistent quality, consider the following parameters:
- Shot Type: Steel, stainless steel, ceramic, or glass
- Shot Size: Small = smoother surface; Large = deeper stress
- Almen Intensity: Standard method for verifying peening effectiveness
- Coverage: Surface must be 100% uniformly impacted
- System Type:
- Nozzle Type: Precision control, ideal for complex parts
- Impeller Type: High throughput, low cost, suitable for mass production
Robotic multi-axis shot peening ensures repeatability, especially for aerospace and medical-grade applications.
Why Choose Shot Peening?
- Boosts fatigue resistance and wear life
- Enables lightweight, compact design without sacrificing strength
- Prevents surface-initiated microcracks
- Supports high-reliability manufacturing
Recommended: High-Precision Shot Peening Services
For high-reliability parts, choose a service provider offering:
- Multi-axis robotic peening
- Controlled Almen intensity
- Application-specific shot material
- Full traceability and process documentation
Company Information
_thumb_03c39bee-c71a-42fa-aa30-860b52f27965_thumb_a99d4e92-9af2-48da-b42e-9fbc30e0a558.jpg)
Industry Classification
/ Transportation equipment
Main 3 Products
Heat treatment surface treatment (carbur / Quenching and tempering / Gas soft nitriding
Phone Number
Homepage URL
DOWA THERMOTECH (THAILAND) CO., LTD. was established in 2007 as a member of the DOWA Group. Located in Rayong Province, Thailand, the company operates a factory spanning 5,148 square meters. As expert ...
CONTACT
Contact