采用2kW Nd:YAG激光器对NiTi合金进行表面重熔处理,利用扫描电镜、X射线衍射、X光电子能谱分析重熔层成分和组织结构,利用电化学测试研究重熔层耐腐蚀性能.结果表明:NiTi合金经过激光重熔处理后,可得到致密的重熔层;根据激光处理参数的不同,在重熔层中会出现Ti2Ni、TiNi3等新相,重熔层表面Ti/Ni及Ti4+/Ti比显著提高;电化学极化曲线表明激光重熔后NiTi合金的耐蚀性得到了显著改善.
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