The experimental study on sensitivity of hydrogen embrittlement of 20Cr 2Ni 4a high-strength steel cleaned by ultrasonic and deruster

In order to test whether there is the change of mechanics performance cleaned by ultrasonic and deruster, the experiments on mechanics performance and sensitivity of hydrogen embrittlement have been conducted. During the experiments, 20Cr(2)Ni(4)A steel are selected as the materials, which endure the relatively great concussion load in the bad condition, and the gaps' long-time permanence experiments and short-time tension and concussion experiments have been done. Through the compare of mechanics performances and the SEM analysis of tensile fracture surface of the samples, it can be proved that the mechanics performances and rupture mechanism are the same, no matter whether the materials are cleaned by ultrasonic and deruster or not. These indicate that it doesn't bring the change of mechanics performances and hydrogen embrittlement to clean the materialss by ultrasonic and deruster.