The effect of heat treatment on mechanical properties and microstructure of high-strength low-alloy ferrite-bainite pipe steels is studied. Specimens are heated in a laboratory furnace up to a temperature in the range 100–850°C. Dependences for the change in mechanical properties on heating temperature and the main features of steel structure are determined. TEM is used to study excess phase precipitation, including Nb and V carbonitrides, during heating. Unfavorable temperature ranges are determined for heating pipe steels with a ferrite-bainite structure. The results obtained may be used in industrial production and during development of new technology for thermomechanical treatment.
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* Part II. Started in No. 7, 2011.
Translated from Metallurg, No. 8, pp. 62–68, August, 2011.
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Matrosov, M.Y., Talanov, O.P., Lyasotskii, I.V. et al. Effect of heat treatment on mechanical properties and structure of high-strength pipe steels with a ferrite-bainite structure* . Metallurgist 55, 582–590 (2011). https://doi.org/10.1007/s11015-011-9471-x
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DOI: https://doi.org/10.1007/s11015-011-9471-x