本发明提供一种贝氏体钢轨铝热焊焊后热处理工艺,所述焊后热处理工艺包括以下步骤：(1)使通过铝热焊焊接得到的接头冷却至室温,然后对接头进行加热5-10min,保温5-10min；然后采用0.2～0.8℃/s的冷却速度,将经保温处理得到的接头进行缓冷处理,直至接头温度达到100℃以下；(2)对经步骤(1)处理得到的接头进行加热,然后保温,自然冷却至室温。

The invention provides a post weld heat treatment process for aluminothermic welding of bainitic rail, which comprises the following steps: (1) cooling the joint obtained by aluminothermic welding to room temperature, then heating the joint for 5-10min and heat preservation for 5-10min; Then, use the cooling rate of 0.2 ~ 0.8 ℃ / s to slowly cool the joint obtained by thermal insulation treatment until the joint temperature reaches below 100 ℃（ 2) The joint treated in step (1) is heated, then insulated and naturally cooled to room temperature.