Abstract: A process for manufacturing alloy powder with dual consumable rotary electrodes arc melting is suitable for manufacturing pure and low-surface-area powder of metal, active metals and their alloys. In the process, rotary electrode and tungsten electrode adopted by conventional rotary electrode and arc process for manufacturing powder are respectively replaced with a rotary or anodic electrode containing a first metal and a feed or cathodic electrode containing a second metal. An inert gas is supplied into equipment for implementing the process to serve as a protective atmosphere and stabilize generated electric arc. The cathodic electrode melts under the high temperature of the arc at a cathodic spot, and droplets of the molten cathodic or second metal are sprayed toward the anodic electrode to mix with molten anodic or first metal and thrown-out by a centrifugal force of the rotary electrode to produce round-shaped alloy powder containing the first and the second metal.

Abstract: A method for solidification-controllable induction melting of alloy with cold copper crucible employs the vacuum induction furnace with cold crucible to melt metals, particularly active metals, to obtain alloy ingots having directionally solidified structure at the same time. By using the cold crucible also as a solidification mold in the melting of metal materials, controlling working parameters of the induction furnace, and changing the copper crucible design, it is possible to control the solidified structure of the melted alloy and obtain high quality ingots having impurity-free and directionally arranged or fine-crystalline structure. The problem of low metal melting efficiency in the conventional vacuum induction furnace with cold crucible due to loss of a large amount of heat carried away by cooling water for cooling the crucible can therefore be overcome.

Abstract: A method for solidification-controllable induction melting of alloy with cold copper crucible employs the vacuum induction furnace with cold crucible to melt metals, particularly active metals, to obtain alloy ingots having directionally solidified structure at the same time. By using the cold crucible also as a solidification mold in the melting of metal materials, controlling working parameters of the induction furnace, and changing the copper crucible design, it is possible to control the solidified structure of the melted alloy and obtain high quality ingots having impurity-free and directionally arranged or fine-crystalline structure. The problem of low metal melting efficiency in the conventional vacuum induction furnace with cold crucible due to loss of a large amount of heat carried away by cooling water for cooling the crucible can therefore be overcome.

Abstract: A process for manufacturing alloy powder with dual consumable rotary electrodes arc melting is suitable for manufacturing pure and low-surface-area powder of metal, active metals and their alloys. In the process, rotary electrode and tungsten electrode adopted by conventional rotary electrode and arc process for manufacturing powder are respectively replaced with a rotary or anodic electrode containing a first metal and a feed or cathodic electrode containing a second metal. An inert gas is supplied into equipment for implementing the process to serve as a protective atmosphere and stabilize generated electric arc. The cathodic electrode melts under the high temperature of the arc at a cathodic spot, and droplets of the molten cathodic or second metal are sprayed toward the anodic electrode to mix with molten anodic or first metal and thrown out by a centrifugal force of the rotary electrode to produce round-shaped alloy powder containing the first and the second metal.