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作者对铸态和锻态OCr13Ni4Mo钢试样进行了电解充氢后的拉伸及延迟破坏试验。结果表明:该钢具有可逆的氢脆倾向,且随氢含量增加,断口按D(韧窝)-QC(准解理)-IG(沿晶)的顺序变化,发生延滞破坏的应力强度因子门槛值KIH与平均氢含量Co的对数值成线性关系;铸态比锻态的氢致延迟开裂的敏感性要小;在残氢量≤10ppm时,对12．5万KW水轮机铸造叶片的氢致开裂安全性进行了估算。
The authors tested the as-cast and as-forged OCr13Ni4Mo steel samples for tensile and delayed fracture tests after electrolytic hydrogen charging. The results show that the steel has a reversible hydrogen embrittlement tendency. With the increase of hydrogen content, the fracture changes according to the order of D (dimple) -QC (quasi-cleavage) -IG (intergranular), and the stress intensity factor threshold The value KIH is linear with the logarithm of the average hydrogen content Co; the sensitivity of the as cast to as-forged delayed cracking is smaller; at the residual hydrogen content of 10 ppm, the hydrogen induced to 125,000 KW turbine blades Cracking safety has been estimated.