本发明提供一种超高强度汽车钢板氢致延迟断裂性能测试方法，包括针对待测试超高强度钢，准备多组试样；对所述试样进行准静态拉伸试验，获得试样的工程应力应变曲线数据；从该工程应力应变曲线数据中查找出与各组试样的需求弯曲应力对应的需求应变量；针对每组试样，将该试样装夹到对应的弯曲工装夹具上，向该试样加载弯曲应力，利用非接触式光学测量系统DIC对该试样的最小弯曲半径部位的应变量进行测量，在该DIC测量得到的应变量达到需求应变量时，停止向该试样加载弯曲应力，利用该弯曲工装夹具对该试样进行紧固，实现该试样的预弯曲；将预弯曲后的各组试样连同其弯曲工装夹具放置于氢致延迟断裂性能测试试验溶液中，监测样品的开裂情况。

The invention provides a test method for hydrogen induced delayed fracture performance of ultra-high strength automobile steel plate, which comprises preparing a plurality of groups of samples for the ultra-high strength steel to be tested; Performing a quasi-static tensile test on the sample to obtain the engineering stress-strain curve data of the sample; The required stress variables corresponding to the required bending stress of each group of samples are found out from the stress-strain curve data of the project; For each group of samples, clamp the sample onto the corresponding bending fixture, load the bending stress on the sample, measure the stress at the minimum bending radius of the sample with the non-contact optical measurement system DIC, and stop loading the bending stress on the sample when the stress measured by DIC reaches the required stress, Fasten the sample with the bending fixture to realize the pre bending of the sample; Place each group of pre bent samples together with their bending fixture in the hydrogen induced delayed fracture performance test solution to monitor the cracking of the samples.