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DK460UF is deposited on the surface of 9341 high-speed steel by DZ-4000( ) multifunctional surface III hardening machine which use argon as shielding gas. They occur metallurgical reaction by electro-spark deposition technology to make electro-spark deposition migrate to the surface of the tool and form high-performance deposition layer with a strong and stable binding force of matrix. Under the process parameters: 2min, 80V,3000Hz,150μF,obtain the deposited layer which has no obvious defects such as micro-cracks and bubbles, thickness 89μm, microhardness 1487.5Hv. No clear boundaries exist in the deposited layer and the substrate. Transition zone thickness is greater than 20μm. Key words-electro-spark , cutting knife , DK460UF , high-speed steel

Performance Study about Electro-spark Depositing DK460UF Coating on Surface of Turning Tool