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.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF THERMAL TREATMENT OF HIGH-STRENGTH MARTENSITE-AGED STEEL PARTS | 0 |
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