The tempering transformation of A36 low carbon steel is a diffusion-controlled microstructure transformation. The microstructure transformation depends not only on temperature, but also on time, but temperature is the main one.
Because high-temperature rapid tempering has the following advantages: high-temperature rapid tempering saves time and electricity, and its mechanical properties are consistent with traditional processes; high-temperature rapid tempering does not produce temper brittleness; it improves equipment utilization and tempering quality of parts; A36 Low carbon steel has better mechanical properties when tempered rapidly at high temperature than by traditional tempering. Research on high temperature rapid tempering heat treatment of A36 low carbon steel.
Heat A36 low-carbon steel to 910°C, keep it warm for 33 minutes and then cool it in 10% saline solution. After quenching, one group of samples was traditionally tempered at 620 °C for 70 min, and the other three groups of A36 low-carbon steel samples were heated to 620 °C for 30 s on a thermal simulator, and then rapidly tempered for 40, 80 and 120 s respectively. .
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