INVESTIGATION ON THE SURFACE QUALITY OF BÖHLER S290 POWDER METALLURGICAL TOOL STEEL AFTER WEDM MACHINING

L. Toth
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Abstract

Nowadays, there is a growing demand for fast, accurate and precise tool manufacturing. At the same time, the requirements for the quality of tool steel materials have also increased. Increasingly, tools are being made from high alloyed, highest purity, segregation free, homogenous and high hardness materials. These materials are difficult to machine with conventional technology. For this problem a solution could be the electrical discharge machining technology (EDM). During the EDM process an electrical discharge occurs between an anode and a cathode in a dielectric medium [1]. The EDM process is characterized by high heat, that cause structural changes on the surface of the machined materials. In EDM process the surface of the machined material is eroded by melting and evaporation due to large quantity of heat [2]. This paper presents a study of the wire EDM machining surface of S290 PM HSS materials with different parameters performed by multiple cutting. The aim of this investigation was to find the optimal parameters and trim cuts number for the efficient production of the tools from S290 HSS PM materials with the required surface quality.
BÖHLER S290粉末冶金工具钢电火花加工表面质量的研究
如今,对快速、准确和精确的工具制造的需求越来越大。同时,对工具钢材料的质量要求也有所提高。工具越来越多地由高合金、最高纯度、无偏析、均匀和高硬度的材料制成。这些材料很难用传统技术加工。对于这个问题,解决方案可以是电火花加工技术(EDM)。在电火花加工过程中,电介质中的阳极和阴极之间会发生放电[1]。EDM工艺的特点是高热量,这会导致加工材料表面的结构变化。在电火花加工过程中,由于大量的热量,加工材料的表面会被熔化和蒸发侵蚀[2]。本文研究了S290粉末高速钢材料在不同参数下采用多次切削的电火花线切割加工表面。本研究的目的是找到最佳参数和切边数量,以便从S290 HSS PM材料中高效生产具有所需表面质量的工具。
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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