Metal deforming – By shot-blasting
Patent
1999-05-26
2000-03-21
Jones, David
Metal deforming
By shot-blasting
29 907, C21D 706, B21D 5310
Patent
active
060389001
ABSTRACT:
The present invention relates to a method for a surface treatment of a metallic product. In this method, by conducting one step of injecting mixture shots including at least two types of shots comprised of different or same materials consisting of high hardness metal or metallic component and having different shot diameters between 0.6 and 0.03 mm onto the surface of a metallic product at an injection pressure of not less than 0.29 MPa or not less than 50 m/sec, the residual compressive stress of the surface of the metallic product and that of a lower surface layer are made at least -1200 MPa and that of a portion having a depth of about 50 .mu.m below the surface of the metallic product is made -1300 MPa or higher.
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Fuji Kihan Co., Ltd.
Jones David
LaPointe Dennis G.
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