FIELD: metallurgy; deformation thermal treatment of iron-carbon alloys; manufacture of hot-deformed seamless tubes.
SUBSTANCE: proposed method includes preliminary heat treatment of high-strength cast-iron billet at temperature Ac3+200°C continued for 10 h and followed by heating the billet at deformation temperature, deformation of billet and heat treatment of tube.
EFFECT: improved quality of tubes; extended field of application of this method.
4 cl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR MAKING HOT ROLLED SEAMLESS TUBES | 1999 |
|
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| METHOD FOR PRODUCING HIGH-STRENGTH STEEL SHEET | 2023 |
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RU2813069C1 |
