烧结温度对多孔Inconel625合金性能的影响

Effect of sintering temperature on properties of porous Inconel 625 alloy

摘要:

Inconel625有着优异的耐蚀性与高温力学性能,被广泛用于航空航天、石油化工、核工业等领域。多孔材料有着轻质化与优良的透过性能常被用于过滤材料。本文旨在制备出耐蚀性良好的过滤材料,利用粉末冶金技术制备出兼具Inconel625合金本身特性与功能特性的多孔Inconel625合金。实验采用100~200μm粒度的合金粉末,通过模压-气氛烧结的工艺制备了多孔Inconel625合金,并对不同烧结温度下的合金做了形貌表征与性能评价。结果表明,在1240℃烧结温度下合金烧结颈发育良好,孔隙球化率高,此时透气度满足服役性能需求,可作为高温气液过滤材料使用,该温度下合金剪切性能达到最优,最大剪切力为51.0KN,也为后续进一步的研究提供了参考依据。

Abstract:

Inconel625 has excellent corrosion resistance and high temperature mechanical properties, which is widely used in aerospace, petrochemical, nuclear industry etc. Porous materials are widely used as filter materials because of its light weight and excellent permeability. The purpose of this paper is to prepare a filter material with good corrosion resistance. Porous Inconel625 alloy with its own characteristics and functionality was prepared by molding-atmosphere sintering process with 100~200 μm alloy powder. The morphology and properties of the alloy are characterized and evaluated at different sintering temperatures. The results show that the sintered neck is well developed and the degree of pore spheroidization is high at 1240 ℃. At this time, the air permeability can satisfy the requirements of service performance, and can be used as high temperature gas-liquid filter material. At 1240 ℃ sintering temperature, the shear performance of the alloy reaches the best, and the maximum shear force is 51.0 kN, which also provides a reference for further research.