HOT-DEFORMED AND HEAT-TREATED OIL PIPE Russian patent published in 2015 - IPC C22C38/40 C22C38/06 

Abstract RU 2564197 C2

FIELD: metallurgy.

SUBSTANCE: steel contains the following, wt %: carbon 0.46-0.50, manganese 0.65-0.85, silicone 0.17-0.37, sulphur ≤0.030, phosphorus ≤0.030, copper ≤0.30, nickel ≤0.30, chrome ≤0.30, aluminium 0.01-0.06, and iron is the rest. Manufactured pipes have a ferrite-pearlite structure throughout the cross-section, and the following conditions are met for steel components: [copper]+[nickel]+[chrome]=0.25-0.90% and [carbon]+[manganese/6]+[silicone/24]≥0.58%.

EFFECT: providing the required mechanical properties in a state after hot deformation and in a state after heat treatment.

2 dwg, 3 tbl

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RU 2 564 197 C2

Authors

Grekhov Aleksandr Igorevich

Ovchinnikov Dmitrij Vladimirovich

Tikhontseva Nadezhda Takhirovna

Zhukova Svetlana Jul'Evna

Chernykh Elena Sergeevna

Solov'Eva Elena Ivanovna

Dates

2015-09-27Published

2013-07-30Filed