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研究了稀土氯化物CeCl3添加量对H13钢固体渗硼层截面形貌、显微硬度、表面粗糙度以及相组成的影响,以及稀土催渗辅助渗硼H13钢的高温摩擦磨损性能。结果表明:添加2.5%和5%的稀土显著提高渗硼层厚度、显微硬度与致密性,但是表面粗糙度略有提高;10%稀土渗硼试样的渗层最厚,但是其显微硬度、致密性明显下降,表面粗糙度提高;稀土辅助渗硼层中除Fe2B相外还出现了(Fe,Cr)2B相;与不加稀土渗硼试样相比,5%稀土渗硼试样的渗层磨穿时间约增加一倍,磨损率降低21%;5%稀土渗硼试样磨损率比未渗硼H13钢降低了61%,并且也低于10%稀土渗硼试样。因此,加入5%稀土催渗辅助渗硼H13钢的高温耐磨损性能较优。
The effects of rare earth chloride (CeCl3) dosage on the cross-section morphology, microhardness, surface roughness and phase composition of solid boronizing layer of H13 steel were studied. The high temperature friction and wear properties of rare earth chloride-infiltrated boronizing H13 steel were also studied. The results show that the addition of 2.5% and 5% rare earth significantly increases the thickness, microhardness and compactness of the boronizing layer, but slightly increases the surface roughness. The 10% rare earth boronizing sample has the thickest layer, but its microstructure Hardness and densification decreased obviously, and the surface roughness increased. In addition to the Fe2B phase, the (Fe, Cr) 2B phase appeared in the rare earth-assisted boronizing layer. Compared with the boron- The wear-out rate of this kind of coating is doubled and the wear rate is reduced by 21%. The wear rate of 5% rare earth boronized steel is reduced by 61% than that of un-boronized H13 steel and also lower than that of 10% rare earth boronized steel. Therefore, the addition of 5% rare earth seepage infiltration H13 steel boron steel high temperature wear resistance is better.