摘要
某厂矿用23MnNiCrMo54钢链条仅使用了不到1年即发生断裂。除化学成分分析外,采用扫描电镜对断裂的链条进行了断口分析,以揭示其断裂的原因。结果表明:断口有疲劳断裂特有的高密度疲劳条纹,以及大量尺寸大于300μm的颗粒状夹杂物。能谱分析表明:夹杂物含有氧、碳、氮、氟、铁、铝、钛等元素,为Al2O3、SiO2、FeO等,源自冶炼和出钢过程中形成的夹渣。正是这些夹杂物导致了链条过早断裂。
23MnNiCrMo54 steel chain produced by a plant for mining broke when used for as little as less than one year.Besides chemical composition analysis,fracture testing of the broken chain was done by means of a scanning electron microscopy to discover the cause of its breaking.The results showed that the fracture offered high-density fatigue striations characteristic of fatigue failure,and a large amount of granular inclusions as large size as more than 300μm.From EDS analysis it was seen that the inclusions contained elements such as oxygen,carbon,nitrogen,fluorine,iron,aluminum,and titanium,being Al2O3,SiO2 and FeO which originated from slag entrapment formed during smelting and tapping.It was such inclusions that resulted in premature breaking of the chain.
作者
王东兴
李志伟
谢剑波
王阳
付建勋
WANG Dongxing;LI Zhiwei;XIE Jianbo;WANG Yang;FU Jianxun(Wuhu Xinxing Ductile Iron Piples Co., Ltd., Wuhu Anhui 241002, China;Center for Advanced Solidification Technology, Shanghai University, Shanghai 200444, China)
出处
《上海金属》
CAS
2021年第1期113-118,共6页
Shanghai Metals
基金
国家自然科学基金(No.51671124,No.51874195)
国家十三五重点科技支撑研发计划(No.2018YFB0704400)。
