CAJ | 학술논문

在事故现场勘查的基础上，通过材料成分、力学性能、金相组织与断口、碎片附着物以及充装气体成分等检测和试验，结合爆炸能量的理论估算，对一起氧气瓶爆炸事故的性质和原因进行了系统分析。结果表明：瓶体存在的脱碳、微裂纹及局部腐蚀凹坑这些类裂纹缺陷在爆炸产生的巨大载荷下诱发了气瓶的开裂及扩展，其宏观断口表现为韧脆交替的快速断裂特征。依据碎片抛射距离估算的气瓶实际爆炸能量远大于其发生物理爆炸所产生的能量，气瓶爆炸属于化学爆炸。气瓶内存在的碳烃类油脂有机物以及瓶阀关闭时产生的摩擦热或静电火花是氧气瓶发生化学爆炸的直接原因。
재사고현장감사적기출상，통과재료성분、역학성능、금상조직여단구、쇄편부착물이급충장기체성분등검측화시험，결합폭작능량적이론고산，대일기양기병폭작사고적성질화원인진행료계통분석。결과표명：병체존재적탈탄、미렬문급국부부식요갱저사류렬문결함재폭작산생적거대재하하유발료기병적개렬급확전，기굉관단구표현위인취교체적쾌속단렬특정。의거쇄편포사거리고산적기병실제폭작능량원대우기발생물리폭작소산생적능량，기병폭작속우화학폭작。기병내존재적탄경류유지유궤물이급병벌관폐시산생적마찰열혹정전화화시양기병발생화학폭작적직접원인。
Based on material composition, mechanical property, metallurgical structure,pieces of attachments , iflling gas component test and the theoretical estimates of explosion energy the properties and reasons for an explosion accident of oxygen cylinder based on accident scene investigation was analyzed. The results showed that the decarburization, micro-cracks and localized corrosion pits, which were similar to crack defects, induced cracking and expansion of the cylinders under huge explosion load. The actual explosion energy, which is estimated based on the projectile distance of fragments, is much larger than its physical explosion occurred. This oxygen cylinder accident belongs to a chemical explosion. When operators closed the cylinder valve, the detonating energy was provided. Therefore, the hydrocarbon grease in the cylinder and friction heat or electrostatic spark at the closing cylinder valve is the direct cause of chemical explosion for oxygen cylinder.