摘要
Boronizing was applied to Inconel 718. In order to obtain the optimal combination of strength and ductility, the borided Inconel 718 was subjected to standard heat treatment. This consists of solution treatment and then a two-step aging treatment. The borided layer is composed of the compound layer and the boron diffusion zone. Because of the superior hardness of borides, the borided Inconel 718 exhibits a significant reduction in its wear rate and relatively low coefficient of friction （COF） compared with the unborided Inconel 718. The standard heat treatment efficiently promotes the diffusion of boron into the interior of the material and the generation of new borides （Fe2B, CrB）. The borided layer with standard heat treatment shows much better wear resistance due to the thicker borided layer （313.76 μm）.
将718铬镍铁合金进行渗硼处理。为了得到强度和塑性的最佳组合,对硼化718铬镍铁合金进行标准热处理,包括固溶处理和双级时效处理。硼化层由化合物层和硼扩散区组成。由于硼化层有较高的硬度,与没有渗硼的718铬镍铁合金相比,硼化718铬镍铁合金的磨损率显著减少,摩擦因数也较低。标准热处理可以有效促进硼扩散到材料的内部,并促进新硼化物(Fe2B,CrB)的生成。经过标准热处理的硼化718铬镍铁合金由于其较厚的渗硼层(313.76μm)而表现出较好的耐磨性。
基金
Projects(2011CB013402,201303002,2014028002)supported by the National Basic Research Program of China
