Die-sinking electrical discharge machining of a high-strength copper-based alloy for injection molds

Abstract

High-strength copper alloys are used as materials for injection molding tools or as cores and inserts in steel molds because of their high thermal conductivity, corrosion and wear resistance. Unfortunately, there is little technological knowledge on the electrical discharge machining (EDM) of copper-beryllium ASTM C17200 alloy. In this work, rough and finish machining conditions were tested using copper and tungsten-copper as materials for the electrodes. Cross-sectional micrographic and hardness examinations as well as surface roughness measurements were also carried out on workpieces after machining in order to study the thermally affected zones. Appropriate parameters settings for EDM of the investigated alloy are suggested

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

“…Thus, it recently draws the attention of quite several researchers and industries. The use of EDM in mold, tools, automobiles, and aerospace industries has been largely documented [7,8]. However, Volosova et al [9] report the usage of EDM to produce thin-walled separators in the nuclear industry.…”

Modelling and investigating the effect of input parameters on surface roughness in electrical discharge machining of CK45

“…However, it is possible for metallurgical changes to occur from the spark heating the workpiece surface [4]. EDM is a complex process that includes many input and output parameters [5]. On the other hand, formation of multiple holes on the workpiece surface because of EDM nature and increase in surface roughness of workpiece is considered as one of the main problems in EDM process.…”

Electrochemical Characterization of Multilayer Cr/CrN-Based Coatings

“…In the case of nitride-based coatings, nitrogen introduction is needed to grant the formation of metal nitrides. These coatings are used in biomedical applications, micro-electro-mechanical systems (MEMS), design, automotive, the protection of dies for injection molding, low fusion alloys and cutting tools [4]. Coatings consist of nitrides of transition metals, such as TiN, ZrN, CrN and AlTiN, that ensure protection against wear and corrosion by forming chemically-and thermally-stable films.…”