摘要
采用激光剥蚀电感耦合等离子体质谱(LA-ICP-MS)对表面有黑斑的镀锌钢板、有非金属夹杂物的冷轧钢板及开裂的铅黄铜阀芯部件进行分析。通过比较镀锌钢板表面黑斑中12C、27Al、29Si、34S、57Fe、60Ni、66Zn、123Sb和镀锌层中27Al、57Fe、66Zn的时间分辨图,认为这是漏镀或露铁造成的缺陷。采集冷轧钢板非金属夹杂物及其附近钢板中27Al、28Si、29Si、32S、34S、57Fe的时间分辨图,提取相同质量数的合成一张图,发现27Al有信号变化,判定此为氧化铝夹杂物。采集正常和开裂铅黄铜阀芯中57Fe、63Cu、65Cu、66Zn、208Pb的时间分辨图,并进行信号积分,认为开裂铅黄铜阀芯部件有含量比较高的铅;在500μm×500μm的范围内采集5×5的一个矩阵,根据25张时间分辨图合成一张208Pb的时间分辨图,比较后判定开裂部件中铅的颗粒比正常件的要粗,并且纵向分布也不是很规则和均匀。这与金相分析和X射线衍射法分析的结论基本一致。因此,LA-ICP-MS可为金属材料缺陷分析提供一种有效手段。
Laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS)was used to analyze the galvanized steel sheet with a black spot in surface,the cold-rolled steel sheet with nonmetallic inclusions,and the cracking spool valve part of leaded brass.The comparison between the transient signals of 12C,27Al,29Si,34S,57Fe,60Ni,66Zn,and 123Sb in the black spot and those in zinc coating indicated that the defect resulted from skip deposition.The synthetic time resolved spectra of 27Al,28Si,29Si,32S,34S,and 57Fe were obtained respectively from their transient signals collected from the nonmetallic inclusion and its vicinity in a cold rolled steel sheet.The variation of the signals of 27Al proved that the inclusion should be aluminum oxide.Based on the comparison between the transient and integrated signals of 57Fe,63Cu,65Cu,66Zn,and 208Pb in normal and cracking spool valve parts made of leaded brass,the existence of more lead in the cracking one was confirmed.The synthetic time resolved spectra of 208Pb in normal and cracking parts obtained by overlapping 25 transient signals of 5×5 matrix in an area about 500μm×500μm respectively showed that the lead grains in cracking part were bigger and poorly distributed along the depth direction.This conclusion was in agreement with that drawn from metallographic analysis and X-ray diffraction analysis.LA-ICP-MS was considered as an effective method for defect analyses of metallic materials.
作者
金献忠
陈建国
林力
张建波
付冉冉
陈颖娜
刘永丰
JIN Xianzhong;CHEN Jianguo;LIN Li;ZHANG Jianbo;FU Ranran;CHEN Yingna;LIU Yongfeng(Ningbo Academy of Science and Technology for Inspection and Quarantine,Ningbo 315012,China;Ningbo Customs District Technology Center,Ningbo 315012,China)
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2020年第10期665-669,共5页
Electroplating & Finishing
基金
海关总署(原国家质量监督检验检疫总局)科技计划项目(2017IK048)。
关键词
激光剥蚀电感耦合等离子体质谱
缺陷分析
黑斑
夹杂物
开裂
laser ablation inductively coupled plasma mass spectrometry
defect analysis
black spot
inclusion
cracking
