摘要
用透射电镜、扫描电镜及俄歇能谱研究了１６ＮｉＣｏ钢和２３ＮｉＣｏ钢长时间回火后韧性降低及冲击韧性断口出现沿晶断裂的原因。产生脆性的原因主要是由于杂质元素Ｐ、Ｓ及合金元素Ｎｉ在晶界偏析所致。已经变脆的试样，经６００℃保温处理可消除脆性及沿晶脆断。
The causes of the decrease in toughness and intergranular fracture of impact toughness specimen in 16NiCo and 23NiCo steels have been studied by means of SEM, TEM and Auger spectroscopy. The embrittlement is found to be caused by the segregation of phosphorus, sulphur and nickel at grain boundaries. The ductility of the embrittled specimens can be restored and the intergranular fracture prevented through 600 ℃ tempering.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
1998年第1期34-37,共4页
Journal of Iron and Steel Research
关键词
二次硬化
Co-Ni钢
长期回火
脆性
晶界偏析
secondary hardening,Co Ni steel,long time tempering,grain boundary segregation
