EP 0218354 B1 19901107 - HIGH PRESSURE WATER SHOT PEENING
Title (en)
HIGH PRESSURE WATER SHOT PEENING
Publication
Application
Priority
US 77413085 A 19850909
Abstract (en)
[origin: EP0218354A1] High pressure water shot peening is used to process the surface of metallic material, regardless of the surface configuration. By impacting the surface with a supersonic water jet for a predetermined minimum time dependent on the feed rate, the surface is cleaned and decontaminated. When the jet is directed against the inner surface of a tubular member at 2200-2800 ft./sec. for a predetermined dwell time in the range of 0.3 to 0.6 seconds, in./min. a compressive stress is induced in the surface which increases the local micro-hardness of the material. When the jet is impacted against the surface at a velocity in this range, using a self-rotating peener as illustrated, the induced stress is of sufficient magnitude to reduce the susceptibility of the surface to stress corrosion cracking.
IPC 1-7
IPC 8 full level
C21D 7/02 (2006.01); B05B 3/06 (2006.01); B08B 3/02 (2006.01); B08B 9/032 (2006.01); B24C 1/10 (2006.01); B24C 5/00 (2006.01); C21D 7/06 (2006.01)
CPC (source: EP)
B05B 3/06 (2013.01); B08B 3/028 (2013.01); C21D 7/06 (2013.01); B08B 2230/01 (2013.01)
Designated contracting state (EPC)
BE CH FR GB IT LI SE
DOCDB simple family (publication)
EP 0218354 A1 19870415; EP 0218354 B1 19901107; ES 2001668 A6 19880601; JP S6263614 A 19870320
DOCDB simple family (application)
EP 86306633 A 19860828; ES 8601699 A 19860905; JP 20978286 A 19860908