目的 以Ni50Ti50合金为参照物，研究Ni50Ti30Zr20合金的摩擦磨损性能。方法 采用非自耗真空电弧熔炼炉炼制Ni50Ti30Zr20合金，在合金铸锭上切取样品，以Ni50Ti50合金为对比样品，通过能谱测试（EDS）、X射线衍射（XRD）、显微硬度（HV）测试、摩擦磨损测试、扫描电镜测试（SEM）和3D形貌测试，分别评价Ni50Ti30Zr20合金与Ni50Ti50合金的成分、相组成、显微硬度、耐磨性、磨痕形貌和磨损体积。结果 XRD结果显示，Ni50Ti50和Ni50Ti30Zr20合金室温分别由B2奥氏体和B19’马氏体相组成。显微硬度测试结果表明，Ni50Ti30Zr20和Ni50Ti50合金的显微硬度值分别为(381.64±7.32)HV和(230.58±6.74)HV。从形貌图可以看出，两种合金磨损后，磨痕形貌主要由剥层组成。从磨痕能谱分析得出，摩擦实验后，样品表面O和Si元素含量明显增加。根据摩擦系数曲线和磨痕三维形貌图发现，同样载荷下，Ni50Ti30Zr20合金的摩擦系数和磨损体积均小于Ni50Ti50合金，在载荷为20 N时，Ni50Ti30Zr20合金的磨损体积为0.078 mm3，Ni50Ti50合金的磨损体积为0.084 mm3。结论 Ni50Ti30Zr20与Ni50Ti50合金的磨损机制均为疲劳磨损，两种合金在摩擦实验过程中均会发生氧化，同时磨球会有部分剥落到合金磨痕剥层中。Ni50Ti30Zr20合金的耐磨性优于Ni50Ti50合金。

The work aims to investigate the friction and wear properties of Ni50Ti30Zr20 alloy with Ni50Ti50 alloy as the reference object. Ni50Ti30Zr20 alloy was smelted in the non-consumable arc-melting furnace, and the experimental samples were cut from the ingot directly. With Ni50Ti50 alloy as the contrast sample, EDS, XRD, micro-hardness test, friction and wear test, SEM and three-dimensional morphology test were taken to evaluate the composition, phase composition, micro-hardness, wear resistance, wear morphology and wear volume of Ni50Ti30Zr20 alloy and Ni50Ti50 alloy, respectively. XRD results showed that Ni50Ti30Zr20 alloy was composed of B19’ martensite phase and Ni50Ti50 alloy was composed of B2 austenite phase. The results of micro-hardness test showed that the micro-hardness of Ni50Ti30Zr20 and Ni50Ti50 alloy was (381.64±7.32)HV and (230.58± 6.74)HV, respectively. From SEM image, the wear morphologies of both alloys were composed of stripping layers. The content of O and Si elements increased significantly after the wear experiment by energy spectrum measurement. According to the friction coefficient curve and the three-dimensional morphology of wear marks, the friction coefficient and wear volume of Ni50Ti30Zr20 alloy were smaller than that of Ni50Ti50 alloy under the same load. When the load was 20 N, the wear volume of Ni50Ti30Zr20 alloy was 0.078 mm3, and that of Ni50Ti50 alloy was 0.084 mm3. The wear mechanism of Ni50Ti30Zr20 and Ni50Ti50 alloys is fatigue wear. During the process of wear test, both alloys can be oxidized, and the grinding ball is partially peeled into the grinding mark. The wear resistance of Ni50Ti30Zr20 alloy is better than that of Ni50Ti50 alloy.