Influence of heat treatment on the effectiveness of microalloying of pipe steels

Autor: Frantov, I. I., Golovanenko, S. A., Moiseev, B. A., Burnyashev, I. I.
Zdroj: Metal Science and Heat Treatment; November 1980, Vol. 22 Issue: 11 p842-845, 4p
Abstrakt: 1.In steel with boron the stability of austenite during quenching increases when the grains are fine. A reduction of the total length of austenite grain boundaries leads to a loss of the effect of boron. The heat treatment of steel microalloyed with boron (temperature-time parameters of quenching) must ensure fine grains (=30 µm).2.The optimal tempering temperature for steel with boron is the temperature at which precipitation of carbide phase is maximal.3.The change from lath martensite to a recrystallized structure and the solution and coalescence of carbide phase in the intercritical temperature range are responsible for the high susceptibility to evenly distributed plastic deformation.
Databáze: Supplemental Index