电站用钢拉伸白点的探讨  

TENSILE FLAKE OF POWER STATION STEEL

作　　者：廖波[1] 康大韬[1] 雷廷权[2] 

机构地区：[1]燕山大学 [2]哈尔滨工业大学

出　　处：《钢铁》1993年第9期67-69,78,共4页Iron and Steel

摘　　要：本文采用慢拉伸和扫描电镜观察,探讨了电站用钢中拉伸白点的形成过程。结果表明,钢中氢偏聚,位错塞积的拉应力集中区是拉伸白点的主要形核部位;拉伸白点的扩展为不连续过程,并受白点前沿氢偏聚程度的控制。拉伸白点呈现特殊的穿晶准解理形态。The tensile flake of power station steel was investigated by using slow tensile test and scanning electron microscopy. The results show that the trixial tensile stress region of dislocation piledup and hydrogen concentrated are the main nucleating positions of tensile flake. The propagation process of tensile flake is a discontinuous process and this process is controlled by the concentrated hydrogen level ahead of the flake, The micromorphology of tensile flake is particular transgranular quasi-clcavage.

关 键 词：白点 拉伸 偏聚 形核 位错 拉应力 扩展 部位 扫描电镜观察 前沿 

分 类 号：TF761.3[冶金工程—钢铁冶金] TG142[一般工业技术—材料科学与工程]