Sugino Cavitation Water Jet Peening

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Cavitation Water Jet Peening Technology

CWJP

A shotless, high-pressure water jet technology that improves compressive stress and fatigue life of metal

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What is CWJP?

How CWJP Works

Cavitation is generated by high-pressure water jets underwater with a special cavitation-accelerating nozzle. When the bubbles collapse near the workpiece, peening effects are achieved with GPa-class impact.

Processing Examples

Prevention of stress corrosion cracking of welds in structures.

Improve compressive stress of aerospace parts, molding parts, additive manufacturing parts, automotive parts, etc.

Specification

� Treatment Depth Surpasses Shot Peening

Possible to apply compressive stress nearly 1 mm deep from the surface.

(Hardness:HRC��.�)

Possible to apply nearly �mm deep

Improve fatigue strength and long service life

Possible to improve fatigue strength and fatigue life.

(Hardness:HRC��.�)

Repeated �� times, Stress Amplitudes UP ��%

� Clean Manufacturing Process

Only requires water. Shotless and no need of washing process. Clean and time effective.

Water Jet Peening

Water Jet Peening

Shot Peening

Processing Change Program

� Does not alter toughness

CWJP processing technology can remove poorly melted powder left behind in additive manufacturing.

The structure is refined and densified by CWJP and hardness is improved while maintaining the original toughness (tenacity) of the material. It is also possible to crush micro cracks in the surface layer.

Before Processing Shot Peening

Cross-Sectional

� Micro Dimples Formed on the Surface

Micro dimples become oil pockets and improve sliding.

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