Depo Series Introduces Next-Level Coating and Overlay Using EDM Principles

Minimizing downtime for repair as well as parts inventory. Promise to productivity improvement and cost reduction

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Aluminum Die Casting

Diecasting and casting dies often suffer corrosion and erosion from molten aluminum, causing surface damage. Heat-induced expansion and subsequent cooling lead to heat cracks.


Depo series tackles these challenges by coating with cermet electrodes, preventing erosion, seizing, scuffing, and heat cracks. This maintains liquid flow, reducing underfill and production defects significantly.

Erosion Test of Coating

Weight Loss of Molten Aluminum Coating Sample was less than 1/10 comparing to Non-Coating Sample.


Test Condition / Sample: SKD-61, Molten Al: ADC12 (680℃) rotated at 30rpm

High Bonding Strength Mechanism

A Depo Series device rapidly discharges direct current from its internal capacitor for an ultra-short period, lasting microseconds to milliseconds.

This intense discharge heats the electrode material, reaching temperatures from 8,000 to 25,000℃.

The superheated material transforms into plasma, seamlessly transferring and alloying onto the workpiece surface, ensuring robust bonding below and on the surface.