(北京航空材料研究院，北京 100095)
摘 要: 喷射成形工艺能够以较少的工序生产整体致密、成分均匀、晶粒细化、力学性能优良的坯件，但控制喷射成形过程的独立工艺参数却较多，给工艺优化带来困难。结合所建立的3D形状模型，针对两种不同运动方式的沉积器，探讨了喷射熔滴质量流率沿雾化锥的轴向及径向的空间分布，研究了雾化压力、沉积距离、沉积器下降速度、偏心距及倾斜角对高温合金沉积坯形状及致密度的影响。研究结果表明，通过计算机辅助优化工艺参数后，可以获得所需形状的、致密的沉积坯。
关键字: 喷射成形 高温合金 质量流率分布 形状模型
（Institute of Aeronautical Materials, Beijing 100095, P. R. China）
Abstract:The effect of processing parameters on shape and porosity of spray formed superalloy preform was studied using a 3D shape model, in which a further investigation of the spacial distribution of mass flux in the spray cone and tow sorts of substrate motion mechanism was concerned. It was concluded that a low porosity superalloy preform with desired shape can be achieved by optimizing the processing parameters.
Key words: spray forming; superalloy; mass flux distribution; shape model
