Method for heat treatment of P92 steel

The invention discloses a method for the heat treatment of P92 steel. In the method, a flexible ceramic resistor heating heat treatment process is adopted; and in the arrangement of a heating zone and a heat insulation layer, an internal and external wall temperature difference in a isothermal process is made less than 30 DEG C by reasonably determining the width of a heater and a heat insulation cotton and controlling temperature rise speed and heat insulation time so as to ensure the impact performance of weld joints and improve the service performance of the material.