热反应扩散时间对钒铬共渗层显微形貌及性能的影响

发布时间：2018-05-27 21:51

本文选题：热反应扩散法 + 铬钒共渗层　；参考：《材料导报》2017年S1期

【摘要】：近年来,铬钒共渗层由于具有优良的综合性能被逐渐关注并广泛研究与应用,但已有的报道对其显微形貌尤其是界面结构以及性能的研究较少。采用热反应扩散法对Cr12钢进行铬钒共渗处理,利用光学显微镜(OM)、扫描电镜(SEM)、X射线能谱仪(EDS)、X射线衍射仪(XRD)对渗层的显微结构进行了分析。重点讨论了热反应扩散时间对渗层厚度、显微硬度、物相组成以及膜基结合力的影响;分析了主要元素沿渗层到基体方向的变化趋势和特点。结果表明:随着渗入时间的延长,所得渗层的厚度为2.0~8.2μm,渗层连续、均匀较致密。铬钒共渗层的物相组成主要为VC、Cr7C3和(Cr,Fe)7C3,反应过程中各物相对应的衍射峰强度会发生相应的变化。渗层的显微硬度值为1 683.80HV0.3~1 948.57HV0.3,明显高于空白基体的显微硬度值;划痕测试结果表明铬钒共渗层和基体的界面结合良好,结合力为55~64N。
[Abstract]:In recent years, the chromium vanadium co permeable layer has been paid more attention to and widely studied and applied because of its excellent comprehensive properties. However, there have been few reports on its microstructure, especially the interface structure and properties. The thermal reaction diffusion method has been used to treat Cr12 steel by chromonad treatment, using optical microscope (OM), scanning electron microscope (SEM) and X ray energy spectrum. The microstructure of the permeable layer was analyzed by instrument (EDS) and X ray diffractometer (XRD). The influence of thermal reaction diffusion time on the thickness, microhardness, phase composition and the bonding force of the film base was discussed, and the trend and characteristics of the main elements along the permeation layer to the matrix were analyzed. The results showed that the infiltration time was prolonged and the infiltration was obtained. The thickness of the layer is 2.0~8.2 mu m, the layer is continuous and compact. The phase composition of the Chrome Vanadium Co permeable layer is mainly VC, Cr7C3 and (Cr, Fe) 7C3. The corresponding changes in the diffraction peak intensity of each substance in the reaction process. The microhardness value of the permeable layer is 1 683.80HV0.3~1 948.57HV0.3, which is obviously higher than the microhardness value of the blank matrix; scratch test. The results show that the interface between CR and V co cementation layer and matrix is good, and the binding force is 55~64N.
【作者单位】：西南石油大学材料科学与工程学院;
【基金】：四川省大学生创新创业训练计划项目(KSZ14122) 四川省高等学校油气田材料重点实验室项目(X151516KCL02)
【分类号】：TG142.1;TG174.445

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