FIELD: metallurgy.
SUBSTANCE: steel contains the following component ratio, wt %: carbon 0.25-0.75; manganese 2.4-3.0; chrome 2.4-3.0; silicon 1.6-2.5; molybdenum 0.5-0.6; vanadium 0.10-0.16; and iron is the rest. After rolling heating at continuous slow cooling with the rate of 0.3-0.03°C/s and the temperature of transformation in the beinite area of 400-100°C it has the structure of carbide-free lower bainite.
EFFECT: specified hardenability to the depth up to 1000 mm, and the guaranteed creation of the structure of lower carbide-free bainite.
4 tbl
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| LOW-CARBON ALLOYED STEEL | 2011 |
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| RAIL STEEL | 2003 |
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| HIGH-STRENGTH WELDABLE STEEL AND ITS VERSIONS | 1996 |
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| HIGH-STRENGTH STEEL FOR MAIN PIPELINES WITH LOW YIELD FACTOR AND HIGH LOW-TEMPERATURE DUCTILITY | 1996 |
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RU2822646C2 |
| ALLOY STEEL TO OBTAIN LOW-ALLOY HIGH-STRENGTH STEEL | 2013 |
|
RU2620216C2 |
| RAIL STEEL | 2002 |
|
RU2232202C1 |
