氮致304不锈钢热轧龟裂的电子光学研究  

Research on Nitrogen-Induced Cracking of 304 Stainless Steel during Hot-Rolling Process by Electron Microscopy Methods

作　　者：林良道[1] 陈家光[1] 

机构地区：[1]上海宝钢股份公司技术中心,上海210039

出　　处：《物理测试》2005年第2期52-54,59,共4页Physics Examination and Testing

摘　　要：使用扫描电镜和电子探针能谱仪分析了304不锈钢热轧龟裂样品,给出了开裂的显微特征,并认为由于氮含量较高,板坯在热轧时柱状晶晶界析出氮气泡,从而导致板坯沿晶开裂。A cracking sample of 304 stainless steel slab was carefully investigated by SEM and EDS. Based on the microanalysis, it is found that the nitrogenous bubbles distribute along grain boundaries of columnar dendrites, and the slab cracking may be due to too high N content in the steel.

关 键 词：304不锈钢 光学研究 热轧 龟裂 电子探针 扫描电镜 显微特征 晶界析出 沿晶开裂 能谱仪 氮含量 柱状晶 板坯 

分 类 号：TG335[金属学及工艺—金属压力加工]