摘要
用PHI600型扫描俄歇探针研究了35CrMnMo钢大锻件断口上亮线的本质,并确定了它的形成机制。结果表明,宏观断口上的亮线主要是磷在奥氏体晶界高度偏聚引起沿晶脆性断裂的结果,本质上属于高温回火脆。同时,还提出了减少或避免产生亮线的措施,对提高汽轮机转子、压力容器、火炮身管等大型重要构件的材质有实际意义。
The nature of bright lines on fracture surface (BRFS) of large 35CrMnMo steel forging has been studied by means of Scanning Auger Microprobe model PHI 600, and their formation mechanism has been defined. It is found that the BRFS was formed by intergranular brittle fracture induced by high phosphorus segregation in grain boundaries of austenite. The fracture is, in essence, a reversible temper embrittlement. Some measures for prevention or decrease of BRFS significant for improving qualities of turbine rotor, pressure vessel and gun barrel have been raised.
出处
《钢铁》
CAS
CSCD
北大核心
1991年第6期46-50,86,共6页
Iron and Steel
