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对固体渗硼剂(碳化硼+碳化硅)中添加氧化镧对钛合金渗硼层的表面形貌与相组成、渗层厚度、渗层硬度、渗层与基体的界面结合力以及渗层摩擦磨损性能的影响进行了研究。结果表明,固体渗硼剂中添加氧化镧(4.0%,质量分数)细化了渗层表面形貌组织;显著提高了渗层的厚度与表面硬度(增幅分别为50.7%和34.8%);提高了渗层与基体的界面结合力(增幅为37.25%);大幅提高了渗层在摩擦磨损过程中抗剥落性能以及渗层自身的抗裂性能。自身抗裂性能的提高与渗层中含有Ti金属物相从而提高渗层的韧性有关。添加氧化镧渗层与未添加氧化镧渗层相比,具有低的摩擦系数(0.12)且摩擦磨损表面无对摩件中Fe元素。
Addition of lanthanum oxide to the solid boronizing agent (boron carbide + silicon carbide) on the surface morphology and phase composition of the titanium alloy boronizing layer, the thickness of the diffusion layer, the hardness of the diffusion layer, the interfacial adhesion between the diffusion layer and the substrate, The impact of wear performance was studied. The results show that the addition of lanthanum oxide (4.0%, mass fraction) to solid boronizing agent can refine the surface microstructure of the layer and increase the thickness and surface hardness of the layer (50.7% and 34.8% respectively) The interfacial bonding between the infiltrated layer and the substrate (an increase of 37.25%); the anti-spalling property of the infiltrated layer during friction and wear and the crack resistance of the infiltrated layer are greatly improved. The improvement of self-crack resistance is related to the inclusion of Ti metal phase in the layer to improve the toughness of the layer. Addition of lanthanum oxide has a low coefficient of friction (0.12) compared to the lanthanum oxide-free lamella, and no frictional wear on the surface of the Fe element.