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公开(公告)号：US4047933A
公开(公告)日：1977-09-13
申请号：US692312
申请日：1976-06-03
CPC分类号： B22F9/082
摘要： Thermally induced porosity, which can lead to cracking in metal powders after consolidation, is believed to be caused by the entrapment of the inert gas used for atomization within the metal powders. The addition of an activating agent to the molten alloy prior to atomization with an inert gas, such as argon, serves to substantially reduce the porosity of metal powders. Suitable activating agents are characterized by an ability to rapidly diffuse to the surface of a molten metal particle and an affinity for oxygen. Activating agents that are useful for high nickel alloys and highly alloyed steels include magnesium, calcium, lithium, silicon, and rare earths.
摘要翻译： 被认为是在金属粉末中夹带用于雾化的惰性气体引起的热致孔隙度，其可导致金属粉末在固结后开裂。 在用惰性气体（例如氩气）雾化之前，向熔融合金中添加活化剂用于大大降低金属粉末的孔隙率。 合适的活化剂的特征在于能够快速扩散到熔融金属颗粒的表面和对氧的亲和力。 对高镍合金和高合金钢有用的活性剂包括镁，钙，锂，硅和稀土。
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2.发明授权
公开(公告)号：US4066117A
公开(公告)日：1978-01-03
申请号：US626304
申请日：1975-10-28
CPC分类号： B22D23/003
摘要： A process is disclosed for producing a high density spray cast metal body from a highly energetic atomized metal stream by directing said atomized stream into the interior of a mold and causing said stream to scan and fill said mold interior by effecting relative movement between said atomized metal stream and said mold, thereby producing a fine grained spray cast metal body of high density.
摘要翻译： 公开了一种用于通过将所述雾化流引导到模具内部并通过在所述雾化金属之间进行相对运动而使所述流扫描和填充所述模具内部，从高能量雾化金属流中生产高密度喷射铸造金属体的方法 流和所述模具，从而产生高密度的细粒喷雾金属体。
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公开(公告)号：US4080126A
公开(公告)日：1978-03-21
申请号：US749113
申请日：1976-12-09
CPC分类号： B22F9/082 , B22F2009/0828 , B22F2009/0896
摘要： Apparatus and method for water atomizing molten metal to provide a low oxygen metal powder. A molten metal stream is introduced to an atomization vessel containing a pressurized inert gas. The metal stream is atomized, by impingement of high pressure water within the atomization vessel. The atomization vessel has an exit aperture located so that the slurry of water and metal powder can exit from the atomization vessel only after deflection within the atomization vessel. Inert gas contained within the atomization vessel and entrapped within the slurry during atomization begins to leave the slurry during deflection, the inert gas returning to the atomization vessel atmosphere. The inert gas removal process continues after passage through the exit aperture and entrance into a closed degassing vessel. In this vessel, substantially all of the inert gas is removed from the slurry by gravity separation for return to the atmosphere of the atomization vessel, and the turbulent conditions initially present in the slurry are substantially dissipated prior to passage of the slurry from the closed degassing vessel.
摘要翻译： 用于雾化熔融金属以提供低氧金属粉末的装置和方法。 将熔融金属流引入含有加压惰性气体的雾化容器中。 通过在雾化容器内冲击高压水，将金属流雾化。 雾化容器具有出口孔，其位置使得水和金属粉末的浆料仅在雾化容器内的偏转之后才能从雾化容器中排出。 包含在雾化容器内并且在雾化期间被包埋在浆料内的惰性气体在偏转期间开始离开浆料，惰性气体返回到雾化容器气氛。 惰性气体去除过程在通过出口孔并进入封闭的脱气容器后继续。 在该容器中，通过重力分离将基本上所有的惰性气体从浆料中除去以返回到雾化容器的气氛中，并且最初存在于浆料中的湍流条件在浆料从封闭脱气通过之前基本上消散 船只。
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