摘要
采用光谱仪、金相显微镜以及电子探针显微分析仪等对煤气发生炉立面Q235B钢板断裂处的化学成分、断面形貌和夹杂物成分等进行了失效分析。认为钢板中存在的带状金相组织是导致钢板断裂的主要原因,少量的硫化物和硅酸盐混合夹杂也对钢板性能产生了影响。提出了在钢材冶炼过程中减少夹杂物的产生、采取正火处理或扩散退火消除带状组织缺陷等预防改进的措施。
We analyze such failure reasons of steel plate Q235B fracture of gas generator as its chemical composition, fracture appearance and inclusion composition by a spectrometer, a metallurgical microscope, an electron probe, etc. We discover that the main causes of the steel plate fracture are sulfide-silicate inclusion and strip metallographic structure in the steel plate. We further present such prevention and improvement measures as inclusion reduction, normalizing processing or strip structure elimination through diffusion annealing.
出处
《山东科学》
CAS
2016年第2期36-40,共5页
Shandong Science
关键词
磨损腐蚀
应力集中
疲劳断裂
金相组织
abrasion and corrosion
stress concentration
fatigue fracture
metallographic structure
