对中心楔块渗碳导致的氢脆断裂现象进行了分析研究。测试分析结果表明 ,中心楔块在渗碳后出现氢脆 ,是因为工件表面缺陷和内部组织应力过大 ,在渗碳气氛中 ,吸附在工件表面的氢分子转变为氢原子 ,随后向应力集中区域富集 ,当氢的浓度达到临界值CH,引起微裂纹 ,裂纹在应力区扩展 ,最后导致氢致滞后断裂。 Hydrogen brittle fracture caused by carburizing the center wedge was analyzed. Test results show that the central wedge hydrogen embrittlement occurs after carburizing because the surface defects and internal stress of the workpiece are too large. In the carburizing atmosphere, hydrogen molecules adsorbed on the surface of the workpiece are transformed into hydrogen atoms, and then stress concentration When the concentration of hydrogen reaches the critical value CH, micro-cracks are caused, and the cracks expand in the stress zone, leading to hydrogen-induced delayed fracture.