抄録
The effect of the Thermo-Mechanical Control Process (TMCP) on the properties o f high-strength low alloy steel has been examined and the following results have been obtained.
The addition of niobium or titanium, especially the combination of niobium and boron is effective for TMCP. Low-temperature toughness of TMCP plate is not significantly influenced by the cooling conditions, but is mainly determined by the controlled-rolling (CR) conditions. TMCP alters the microstructure from ferrite-pearlite to fine-grained ferrite-bainite and consequently increases the strength without a loss in low-temperature toughness, compared with CR process.
The advantages of TMCP plate are a decrease in the carbon equivalent, improvement of HIC resistance and an increase in the impact energy.
