Heat treatment method for improving hydrogen embrittlement resistance of coating hot forming steel

The invention provides a heat treatment method for improving the hydrogen embrittlement resistance of coating hot forming steel. The heat treatment method comprises the following steps: carrying out 600-690 DEG C high-temperature annealing on a pre-coating steel plate; performing hot stamping forming; step tempering; by means of the method, the hydrogen content in the coating hot forming steel with the tensile strength of 1000 MPa or above can be effectively reduced, and after the coating hot forming steel is treated through the heat treatment technology, the hydrogen content can be reduced to 0.65 ppm or below. 本发明提供了一种提高涂镀热成形钢抗氢脆性能的热处理方法，所述热处理方法包括以下步骤：对预涂镀钢板进行600～690℃高温退火；热冲压成形；阶梯回火；该方法可有效降低抗拉强度1000MPa级以上的涂镀热成形钢中的氢含量，所述涂镀热成形钢经本发明的热处理工艺处理之后氢含量能降低至0.65ppm以下。