Experimental Study on the Oxidation and Diffusion Behavior of Inconel 625 and Tool Materials
Experimental Study on the Oxidation and Diffusion Behavior of Inconel 625 and Tool Materials
复制标题
Inconel 625及刀具材料氧化和扩散行为的实验研究
DOI：
10.3390/cryst8120471
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发表时间：
2018
期刊：
影响因子：
2.7
通讯作者：
Huiping Zhang
中科院分区：
文献类型：
--
作者：
Erliang Liu;Ning Wang;Jin Qi;Zhichao Xu;Xia Liu;Huiping Zhang
对Inconel625高温合金进行了氧化和扩散模拟实验，以选择最适合其加工的材料。采用WC/Co、涂层硬质合金和陶瓷三种刀具材料作为刀具材料进行了氧化模拟实验。将三种刀具材料在高温炉中加热30min，用扫描电子显微镜和X射线衍射仪对高温氧化产物进行了分析。工具在真空管炉中加热90min。用X射线能谱仪和X射线衍射仪分析了Inconel625及其刀具材料的元素扩散行为。WC/Co和涂层硬质合金刀具材料中的部分WC和Co被氧化成WO_3、Co3O_4和CoWO_4，且氧化反应随着温度的升高而加剧。对于陶瓷刀具，只有TiC被氧化成了二氧化钛，表现出良好的抗氧化性。在扩散偶实验中，三种刀具材料的扩散水平随着温度的升高而增加，但影响程度不同。涂层硬质合金的(Al，Ti)N涂层阻碍了元素的扩散，而陶瓷刀具中的Al_2O_3有效地抑制了元素的扩散。在氧化和扩散方面，最适合加工Inconel625的刀具材料是陶瓷，其次是涂层硬质合金，然后是WC/Co。
Oxidation and diffusion simulation experiments were conducted to choose the most suitable material for cutting the Inconel 625 superalloy. Three tool materials, WC/Co, coated carbide, and ceramic were used as tool materials in the oxidation simulation experiment. The three tool materials were heated for 30 min in a high-temperature furnace, and the high-temperature oxidation products were examined with scanning electron microscopy and X-ray diffraction (XRD). Tools were heated for 90 min in a vacuum tube furnace. The element diffusion behaviors of Inconel 625 and the tool materials were analysed with energy-dispersive X-ray spectroscopy and XRD. Some of the WC and Co in the WC/Co and coated carbide tool materials was oxidized to WO3, Co3O4, and CoWO4, and the oxidation reaction became more intense as the temperature increased. For the ceramic tool, only TiC was oxidized to TiO2, which indicates good oxidation resistance. In the diffusion couple experiments, the diffusion levels of the three tool materials increased with temperature, but the degree of influence differed. Diffusion of elements was hindered by the (Al, Ti) N coating of the coated carbide and effectively inhibited by the Al2O3 in the ceramic tool. In terms of oxidation and diffusion, the most suitable tool material for cutting Inconel 625 was the ceramic, followed by the coated carbide and then WC/Co.