表面复合强化处理后Ti17钛合金的显微组织和耐磨性能

发布时间：2019-02-09 18:09

【摘要】：分别以硅青铜和YG-8合金为电极进行瞬态电能表面强化结合离子束增强沉积硅青铜对Ti17钛合金进行表面复合强化,研究了电极材料对其组织和耐磨性能的影响。结果表明:Ti17钛合金表面复合强化层由瞬态电能强化层和铜沉积层组成,铜沉积层组织致密,无气孔、微裂纹等缺陷,与瞬态电能强化层结合良好;以硅青铜为电极强化处理后的钛合金表面复合强化层厚约6μm,强化层及界面处无微孔、裂纹等缺陷,表面硬度为517 HV,耐磨性能较未强化的提高了20倍;以YG-8合金为电极处理后的钛合金表面复合强化层厚约15μm,在其瞬态电能强化层中存在少量的微孔和微裂纹,表面硬度为537HV,耐磨性能较未强化的提高了30倍;复合强化后Ti17钛合金的摩擦因数比未强化的略有下降。
[Abstract]:The effect of electrode material on microstructure and wear resistance of Ti17 titanium alloy was studied by using silicon bronze and YG-8 alloy as electrodes to strengthen the surface of Ti17 titanium alloy by transient surface strengthening and ion beam enhanced deposition silicon bronze respectively. The results show that the composite strengthening layer on the surface of Ti17 titanium alloy is composed of transient electric energy strengthening layer and copper deposit layer. The microstructure of the copper deposit layer is compact, no porosity, microcrack and so on, and it is well combined with the transient electric energy strengthening layer. The surface of titanium alloy strengthened with silicon bronze is about 6 渭 m thick, and there are no micropores and cracks in the strengthening layer and interface. The wear resistance of titanium alloy with 517 HV, surface hardness is 20 times higher than that of unstrengthened titanium alloy. The composite strengthening layer thickness of titanium alloy treated with YG-8 alloy is about 15 渭 m. There are a few micropores and microcracks in the transient electric energy strengthening layer. The surface hardness is 537 HVV, and the wear resistance is 30 times higher than that of unstrengthened titanium alloy. The friction coefficient of Ti17 titanium alloy after composite strengthening is slightly lower than that of unstrengthened titanium alloy.
【作者单位】：西北有色金属研究院腐蚀与防护研究所;西北工业大学超高温结构复合材料实验室;
【基金】：国家重点基础研究发展计划项目(2012CB625100)
【分类号】：TG174.44

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