通过将纳米三氧化二铬粉末与大豆电介质混合来提高放电加工性能,从而加工英科耐尔 718 合金

Dunya Adnan Ghulam, A. Ibrahim
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引用次数: 0

摘要

Inconel 718 超级合金适用于暴露在高温下并要求高强度的部件;由于其特性,它是传统工艺中最难加工的合金之一。纳米粉末混合放电加工是通过热物理过程精确加工硬金属三维复杂形状的最复杂工艺之一,因此适合加工 Inconel 718。本研究报告了一项实验调查,通过在可生物降解和可再生的大豆油中添加纳米氧化铬粉末颗粒来改善 Inconel 718 超级合金的加工性能,大豆油可用作保护环境的电介质,磁场可帮助改善加工性能。研究了加工参数,即峰值电流、脉冲持续时间、粉末浓度和磁场对白层厚度、热影响区、表面粗糙度、材料去除率和表面裂纹密度的影响。观察结果表明,在电介质中添加纳米氧化铬颗粒可提高工艺性能。白层厚度和热影响区分别提高了 43.93% 和 48.82%。测量的表面粗糙度和材料去除率分别提高了 51.76% 和 20.62%。扫描电子显微镜的显微照片证实,与未添加纳米 Cr 2 O 3 粉末的加工相比,添加了 4 g/l 纳米 Cr 2 O 3 粉末的加工表面裂纹数量减少了一半,表面裂纹密度提高了 10.31%。据观察,电流对反应的影响最大,其次是粉末浓度、脉冲持续时间和磁场。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhancing Electrical Discharge Machining Performance by Mixing Nano Chromium Trioxide Powder with Soybean Dielectric to Machine Inconel 718 Alloy
Inconel 718 super alloy is suitable for components exposed to high temperatures and demanding high strength; it is one of the hardest alloys to machine by conventional processes due to its properties. Nano Powder mixed electrical discharge machining is one of the most sophisticated processes to produce precise three dimensional complicated forms of hard metals through a thermo-physical process, so it is suitable for machining Inconel 718. This study reports an experimental investigation to improve the machining performance of Inconel 718 super alloy by adding nano chromium oxide powder particles to biodegradable and renewable soybean oil, which is used as a dielectric fluid to preserve the environment, with a magnetic field to assist in improving the process performance. The effects of machining parameters, namely peak current, pulse on time, powder concentration, and magnetic field on the re - sponses in terms of white layer thickness, heat affected zone, surface roughness, material removal rate, and surface crack density were investigated. The observed results manifested that the addition of nano chromium oxide particles to dielectric fluid enhances the process performance. The white layer thickness and heat affected zone improved by 43.93% and 48.82%, respectively. The enhancements in measured surface roughness and material removal rate were 51.76% and 20.62%, respectively. Micrographs of scanning electron microscope verifies that the number of cracks on the machined surface with 4 g/l of nano Cr 2 O 3 powder addition was reduced by half, and surface crack density improved by 10.31%, in comparison to machining without powder addition. It is observed that the current had the largest effect on the responses, followed by powder concentration, pulse on time, and magnetic field.
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