用拉伸的方法研究了静态充氢和动态充氢对SM490B纯净钢力学性能的作用,结果表明:随着充氢电流密度的增加,试样的延伸率连续降低.动态充氢试样的氢致塑性损失明显大于静态充氢拉伸试样的氢致塑性损失.氢原子提高了试样的屈服强度,而试样的抗拉强度随电流密度增大而减小.随着充氢电流密度的增加,静态拉伸试样的断口均为韧窝状,而动态拉伸试样的断口形貌由韧窝状向准解理状变化.
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