稀土对H13钢固体渗硼层高温摩擦磨损性能的影响

发布时间：2018-04-19 23:05

本文选题：金属材料 + 稀土元素　；参考：《材料研究学报》2015年07期

【摘要】：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。
[Abstract]:The effects of CeCl3 addition of rare earth chloride on the cross section morphology, microhardness, surface roughness and phase composition of solid boronizing layer of H13 steel were studied, and the friction and wear properties of H13 steel assisted by rare earth-precipitated boronizing at high temperature were also studied. The results showed that the addition of 2.5% and 5% rare earth significantly increased the thickness, microhardness and densification of boronizing layer, but the surface roughness increased slightly, but the microhardness and densification of 10% rare earth boronizing sample decreased obviously. The surface roughness was improved, and in addition to the Fe2B phase, there was also the Fe (Fe) Cr _ (2) B phase in the rare-earth assisted boronizing layer, and the wear time of the boronizing sample of 5% rare earth was increased by about twice as compared with that of the boronizing sample without rare earth. The wear rate of rare earth boronizing samples decreased by 21% and 61% than that of non-boronized H13 steel, and the wear rate was also lower than that of 10% rare earth boronizing specimens. Therefore, the wear resistance of H13 steel with 5% rare-earth catalyst is better than that of H13 steel at high temperature.
【作者单位】：上海大学材料科学与工程学院;
【基金】：上海市重点学科建设项目S30107资助~~
【分类号】：TG142.1;TG156.87

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