Analysis on fillet loose of stainless steel tube by high-frequency induction brazing
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摘要: 应用高频感应钎焊对1Cr18Ni9Ti不锈钢导管和不锈钢管弯头进行焊接,焊接后钎角处存在疏松缺陷。为了研究疏松组织形貌,采用金相显微镜(OM)、扫描电镜(SEM)、能谱分析仪(EDS)进行宏观形貌、微观组织的观察和分析。采用能谱分析仪对疏松位置进行区域检测和线性扫描,分析疏松位置及其周围区域的元素分布规律。试验表明:钎角根部存在等轴晶和少量分散状疏松,钎角中部存在大量枝晶和少量疏松,钎角尾部存在大量聚集状疏松并在其末端存在大量氧化物夹渣。Abstract: 1Cr18Ni9Ti stainless steel tube and 1Crl8Ni9Ti stainless steel bends were welded by high-frequency induction brazing, and the loose defects occurs in the fillet of brazed joint after brazing. The macro morphology and microstructure of brazed joint were observed and analyzed to study the microstructure and morphology of lose by optical microscope (OM) and field emission scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The loose defects were analyzed by energy dispersive spectrometer (EDS), then the distribution regular of the defects was studied. The results show that the roots of fillet exist isometric crystal and a few scattered lose, the middle of fillet exist a lot of dendritic crystal and a few loose, the tail of fillet exist a lot of aggregate shape loose and a lot of oxide slag.
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Keywords:
- stainless steel tube /
- high-frequency induction brazing /
- fillet /
- loose
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