The impact toughness, hydrogen content and inclusion number of austenitic steel 22Mn 13Cr 5Ni 0.25N both before and after ESR at 77 K were measured. The effect of ESR on cryogenic toughness was investigated by means of TEM and SEM.

• 测定了 77K下 2 2 Mn- 13Cr- 5 Ni- 0 .；2 5 N奥氏体钢电渣重熔前后的冲击韧性、氢含量及夹杂物含量；并利用扫描电子显微镜和透射电子显微镜研究了电渣重熔对该钢低温韧性的影响。