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粉末冶金是我国目前急需大力发展的重要工业。为提高粉末冶金制品的性能,采用高品质铁粉是很重要的前提。制造低密度水雾化铁粉是各国粉末冶金界努力的方向。一般情况下,水雾化铁粉的松装密度为2.8～3.09/cm~3。在水雾化铁粉生产中,增大雾化用水的压力和提高喷向铁水流的水流量可获得不规则形状的铁粉,并降低其松装密度。但是,这样做却难以制得适合工业化生产的、经济的低密度铁粉。西德曼内斯曼公司米尔厂近年来在这个领域有所突破,开发了生产低松装密度(2.5g/cm~3)铁粉的技术,由这种铁粉压制出生坯强度很高的中等密度压坯。这种铁粉的生产关键在于调整好雾化角度和采用高温(在1000～1200℃,而通常在900℃左右)还原工艺。
Powder metallurgy is an urgent need for the development of China’s important industries. To improve the performance of powder metallurgy products, the use of high quality iron powder is a very important prerequisite. Manufacturing low-density water atomized iron powder powder metallurgy industry in various countries efforts to the direction. Under normal circumstances, the bulk density of water atomized iron powder 2.8 ~ 3.09 / cm ~ 3. In water atomized iron powder production, increasing the pressure of atomized water and increasing the water flow to the molten iron flow can obtain irregular shaped iron powder and reduce its loose density. However, it is difficult to produce economically low density iron powder suitable for industrial production. In recent years a breakthrough has been made in this area by the Westman Mannesmann Mill Plant, which developed a technology for the production of low bulk density (2.5g / cm 3) iron powder from which green strength is high Medium density compacts. The key to producing this kind of iron powder is to adjust the atomization angle and adopt the high temperature (at 1000-1200 ℃, and usually about 900 ℃) reduction process.