【作者】 霍光； 匡星； 况春江； 邓德国；

【Author】 Huo Guang~1 Kuang Xing~1 Kuang Chunjiang~1 Deng Deguo~2 (1.Advanced Technology & Materials Co.,Ltd.,Beijing,100081;2.Kunming Institute of Precious Metals,Kunming,650221)

【机构】 安泰科技股份有限公司； 昆明贵金属研究所；

【摘要】 喷射成形是人为地控制凝固条件,经过金属熔体的分散、飞行快速冷却、半固态凝固及锭坯进一步冷却等阶段,得到特殊的锭坯组织的成形过程。沉积锭坯组织是上述四个阶段金属熔体凝固的综合结果。近成形是喷射成形技术的另一特点,喷嘴形式、喷嘴数量、沉积器的形状与运动方式影响和决定沉积锭坯的外形。材料的凝固与成形受众多因素影响,很多工艺参数的作用规律尚不明确,因此喷射成形过程的模拟研究十分必要。本文介绍了目前喷射成形工艺中所涉及的理论问题与相关模型。更多还原

【Abstract】 Spray forming involves sequential stages of the melt atomization,the droplet quench,the droplet consolidation on collision and the preforms cooling in continued processing step.These sequential stages control and change the solidification conditions of the melt and determine the spray formed performs microstructure.Near-net-shape manufacturing is another characteristic of the spray forming.The preforms shape depends on the structure and amount of the atomizator,the shape and movement of the substrate.Materials microstructure and shape of the spray formed preforms is influenced by many factors.However,the effects of the processing parameters have not been made clear yet.So it is still necessary to research the spray forming process by experimental and numerical simulation.The theory and model applied to Spray Forming was discussed in this paper.更多还原