Research on the process parameters of W-Mo-Dy co-diffusion by plasma
Applied Mechanics and Materials(2013)
Abstract
W-Mo-Dy alloying layer were prepared on the surface of different carbon content of steel by plasma alloying technique and the optimum parameters were obtained under the experimental conditions. The optimal process parameters are as follows: Source material is Φ 5mm × 30mm tungsten and molybdenum wire, the number of W:Mo is 2:8, spacing is 10~15mm; Rare earth Dy using an independent plate source and evenly arranged on the Φ 100mm the barrel auxiliary cathode; the source voltage is -850~-900V, the cathode voltage is -700~-750V, the limit vacuum is 2Pa; the working pressure is argon gas, gas pressure is 30pa, the insulation temperature is 1020°C the holding time is 4.5h. Available to meet the test requirement and obtain the alloying layer thickness is 128um. © (2013) Trans Tech Publications, Switzerland.
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Key words
alloying layer,phase structure,plasma,surface alloying
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