激光熔覆Fe_3Al基复合涂层对纯Ti的表面强化(英文)

Surface Reinforcement of Ti with Laser Clad Fe_3Al Matrix Composite Coating

在纯钛基材表面激光同轴送粉熔覆Fe3Al-B4C-Cu-Y2O3混合粉末可生成Fe3Al基复合涂层。结果表明,该复合涂层与基材产生了良好的冶金结合。且激光熔覆过程,高硬度的TiCu2Al纳米多晶相中原位生成于涂层中。在硬质激光熔覆涂层的作用下,纯钛基材表面的耐磨性能极大提高。Fe3Al-Cu的应用将在钛及钛合金的激光熔覆表面改性及强化领域发挥着重要的作用。

Laser cladding(LC) is an important high temperature processing technology,which plays an important role in modern aviation industry.A Fe3Al matrix composite coating was fabricated by LC of the Fe3Al-B4C-Cu-Y2O3 mixed powders on pure Ti in an open system.Results indicate that an excellent metallurgical combination between the composite coating and the substrate is obtained.Moreover,TiCu2Al can be produced through the in situ metallurgical reactions during LC process,which shows a high micro-hardness.Under the action of such hard composite coating,the wear resistance of pure Ti surface increases greatly.Fe3Al-Cu is anticipated to be a promising cladding matrix powder to improve the surface reinforcements/modifications of titanium and its alloys.