Mechanical stress improvement process

Details Mechanical stress improvement process Mechanical stress improvement process

1985-04-01

1986-09-16

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148 4, C21D 800

Patent

active

046120718

ABSTRACT:
A process for reducing the residual welding stresses in the weld metal, heat-affected zone and in the adjacent base metal of steel piping that have been butt welded to each other end to end by means of a circumferential weld which comprises mechanically introducing compressive stresses in said weld metal, heat-affected zone and adjacent base metal higher than their individual yield strengths but not exceeding their ultimate strengths in compression.

REFERENCES:
patent: 3625568 (1971-12-01), Verdier
patent: 4018634 (1977-04-01), Fencl
patent: 4342609 (1982-08-01), Beatovic et al.

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