摘要
覆盖在裂纹分裂面上的氧化物，裂面上的断裂源和放射扩展区清晰可见。表面平坦裂纹有冷拉前形成和过程中生成的两种形式，与冷拉过程相关的半径裂，大都起始于钢材表皮下０．０７～０．５ｍｍ皮下夹杂处，并沿富Ｃｒ相与基体的界面进行扩展。
The oxides covered on split face of crack, the crack initiation and extension region were observed obviously by scanning electron microscope (SEM). There were two kinds of crack of which produced before drawingand during drawing. The radius cracks relative to cold drawing mostly initiated at the inclusions of the region0. 07～0. 50 mm from surface of products, and extended along the boundaries of chromium- rich phase and matrix.
出处
《特殊钢》
北大核心
1995年第5期15-18,共4页
Special Steel
关键词
半径裂
冷拉材
阀门钢
奥氏体耐热钢
Valve Steel 5Cr21Mn9Ni4N, Radius Crack Initiation, Propagation
