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| Effect of liquid guide tube pressure on atomization efficiency and powder properties of Ni-based alloy |
| SONG Xin-qiang，LI Yu-xi，HAN Meng |
| （Zigong Tungsten Carbide Co.， Ltd.， Zigong 643000， China） |
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Abstract Effects of the liquid guide tube pressure （the pressure of liquid guide tube tip，[PT）]on the atomization rate （the mass of the molten metal atomized per minute，[RA）]and the physical properties of the powders during vacuum gas atomization process were investigated. The results show that， in the case of other process parameters remain unchanged， the atomization rate decreases and the adhesion of the “satellite ball” reduces effectively with the decrease of the guide tube pressure， and the loose density and fluidity of the powder improve. However， the too low pressure of the guide tube makes the atomization rate too low， and the loose density and fluidity of the powder become worse. Therefore， there is an optimum pressure value of the guide tube during the vacuum gas atomization process.
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Received: 24 November 2016
Published: 27 February 2018
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2018, Vol. 28 
