Experimental Investigation of Drilling Small Hole on Duplex Stainless Steel (SS 2205) Using EDM

Q3 Engineering

Mechanics and Mechanical Engineering Pub Date : 2019-06-01 DOI:10.2478/MME-2019-0014

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引用次数: 1

Abstract

Abstract This work investigates drilling of small holes of 3 mm in diameter on duplex stainless steel. Its machinability index is very low (0.66) when compared to other steels; hence, electrical discharge machining is used. The input parameters are current, spark gap, and dielectric pressure. Each input parameter is considered for three levels. Therefore, the total number of experiments is 3 × 3 × 3 = 27. To reduce the number of runs, Taguchi L9 orthogonal array is used, which have the advantage of maximum and minimum trial runs in its design. The output response is metal removal rate (MRR). To find the best operating parameter, the regression model generated using ANOVA is given as input for MATLAB genetic algorithm (GA). The experimental results indicated that models are significant. The test result indicated that the contribution of the current on the MRR is 42.42%, dielectric pressure is 35.36%, and spark gap is 1.93%. From GA, it is observed that among these three factors, lower value of current and dielectric pressure produced the maximum MRR. The SS 2205 has wide variety of applications, such as high pressure components and control valves, which have large number of components attached to it. Hence, performing micro holes on such high hardness alloy is useful.

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电火花加工双相不锈钢(ss2205)小孔的试验研究

摘要本文研究了在双相不锈钢上钻取直径为3mm的小孔。与其它钢相比，其可加工性指数很低(0.66);因此，采用电火花加工。输入参数为电流、火花间隙和介电压力。每个输入参数被考虑为三个级别。因此，实验总数为3 × 3 × 3 = 27。为了减少运行次数，采用田口L9正交阵列，该正交阵列在设计上具有最大和最小运行次数的优点。输出响应是金属去除率。为了找到最佳运行参数，将方差分析生成的回归模型作为MATLAB遗传算法的输入。实验结果表明，模型是有意义的。测试结果表明，电流对磁阻比的贡献为42.42%，介质压力为35.36%，火花间隙为1.93%。从遗传分析中可以看出，在这三个因素中，电流和介电压力较低时产生的MRR最大。SS 2205有各种各样的应用，如高压元件和控制阀，其中有大量的组件附加到它。因此，在这种高硬度合金上进行微孔是有用的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Mechanics and Mechanical Engineering Engineering-Automotive Engineering

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