CAJ | 학술논문

采用多层喷射沉积技术与双喷嘴雾化系统制备了外径为650 mm，内径为300 mm，长为800 mm的大尺寸6066Al/SiCp/Gr颗粒增强复合材料管坯，并成功挤压外径为350 mm，内径为250 mm的管材．在大尺寸管坯制备工艺中，喷射距离较短，金属液流率较大，以保证喷射流具有较高液相比例，与固相沉积坯表面结合良好，避免层间开裂．与传统喷射沉积工艺相比，多层喷射沉积复合材料坯冷速较高，但致密度稍低，平均致密度约为(88±3)%．采用双环复合雾化器结构以粉包液的方式在雾化前加入增强颗粒，操作简单，影响工艺因素少，能实现增强颗粒的均匀连续加入，适用于大尺寸喷射沉积复合材料的连续制备．分析了多层喷射沉积大型管坯制备工艺中有待解决的一些问题，为工业化制备大尺寸喷射沉积复合材料奠定了实验基础．
채용다층분사침적기술여쌍분취무화계통제비료외경위650 mm，내경위300 mm，장위800 mm적대척촌6066Al/SiCp/Gr과립증강복합재료관배，병성공제압외경위350 mm，내경위250 mm적관재．재대척촌관배제비공예중，분사거리교단，금속액류솔교대，이보증분사류구유교고액상비례，여고상침적배표면결합량호，피면층간개렬．여전통분사침적공예상비，다층분사침적복합재료배랭속교고，단치밀도초저，평균치밀도약위(88±3)%．채용쌍배복합무화기결구이분포액적방식재무화전가입증강과립，조작간단，영향공예인소소，능실현증강과립적균균련속가입，괄용우대척촌분사침적복합재료적련속제비．분석료다층분사침적대형관배제비공예중유대해결적일사문제，위공업화제비대척촌분사침적복합재료전정료실험기출．
Large scale 6066Al/SiCp/Gr composite tube with size up to 650mm in outer diameter, 300 mm in inner diameter and 800 mm in length has been prepared by multi-layer spray deposition and twin-atomizer system, and then extruded into tube product of 350 mm in outer diameter and 250 mm in inner diameter. Using the preparation technology of large-sized tube, the spray distance becomes shorter and the metal flux is larger, so that larger liquid proportion of spray and good combination between layers may be,and obtained crack between layers avoided. Compared to traditional spray deposition technology, the cooling rate of multi-layer spray deposited tube is higher and the density is relatively low, with a mean density of (88±3)%. By the application of dual-looped atomizer, reinforced particulate can be incorporated uniformly with liquid metal stream in the surrounding of flying particulate. And the process can be easily controlled with relatively few influencing factors，especially suitable for the continual preparation of large-sized spray-formed composites. Some problems to be solved in the preparation process have been analyzed, which lays experimental foundation for the industrialized production of large-sized spray-formed composites.