超弹性NiTi合金丝激光焊接组织耐蚀性能研究  

Study on Corrosion Resistance of Superelastic NiTi Alloy Wires in Laser Welded Joint

作　　者：张怡[1] 王宇[1] 叶晶[1] 邱宇晨 

机构地区：[1]西安石油大学材料科学与工程学院,陕西西安710065 [2]湖南埃普特医疗器械有限公司,湖南湘乡411400

出　　处：《热加工工艺》2014年第3期52-54,共3页Hot Working Technology

基　　金：中国石油科技创新基金项目(2012D-5006-0607);陕西省材料加工重点学科项目(YS30230203);西安石油大学青年科技创新基金项目(2011BS005)

摘　　要：在人工模拟体液中采用动电位极化测试方法对NiTi合金焊接组织和母材的腐蚀行为进行对比研究。结果表明,NiTi合金激光焊接组织耐蚀性优于母材;通过EDS分析和SEM观察发现,表面状态对腐蚀结果具有重要影响,孔蚀主要发生在表面杂质聚集处。The comparison and analysis of corrosion behavior in simulated physiological solution was studied using potentiodynamic polarization test method for NiTi alloy laser welded joint and base metal. The results show that the microstructure of NiTi alloy of laser welded joint has better corrosion resistance than the base metal. By EDS analysis and SEM observation, the surface state has important influence on the corrosion results. Pitting mainly occurs in the part, which contains more impurities.

关 键 词：NITI合金 人工模拟体液 耐蚀性 

分 类 号：TG142.75[一般工业技术—材料科学与工程] TG456.7[金属学及工艺—金属材料]