METHOD FOR MANUFACTURE OF WELDED MACHINE PARTS FROM LOW-CARBON STEEL Russian patent published in 2005 - IPC

Abstract RU 2247786 C1

FIELD: mechanical engineering, in particular, manufacture of welded parts, in particular, repair of spherical gas valves.

SUBSTANCE: method involves providing annealing for relieving of welding voltage at temperature of 450-5000C and holding for 4.5-5.0 hours to prevent separation in steel microstructure of coarse carbide lattice determining toughness drop. Temperature is optimized by thermal processing and by testing of toughness samples.

EFFECT: stabilized toughness values and elimination of delay in spherical gas valve repair works.

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RU 2 247 786 C1

Authors

Karpov L.P.

Petrova Zh.A.

Dates

2005-03-10Published

2003-12-01Filed