Al2O3/Al粉冶锭挤压热喷涂丝材工艺研究

通过改进工装模具结构.在普通油压机上实现了丝材的无压余连续挤压.结果表明,粉冶锭在免烧结情况下,锭加热温度(400+10)℃、保温时间3 h以上、挤压比90～100、模具工作带长度1.5 mm、挤压速度约5m/min时,可制备出满足实际工程化使用要求的φ3.+0-0.1mmAl2O3/Al陶瓷复合材料喷涂用丝.同时可使材料利用率比常规挤压提高10%以上;生产效率提高40%左右.

Technics Research on Al2O3/Al Powder Metallurgical Ingot Hot Spraying Wire Prepared by Extruding

The improved design of process tooling structure realized continuous extrusion in common oil press machine. The results show that under powder metallurgical ingot without sintering, the optimum process is as follow, ingot heating temperature is (400±10)℃ , holding time is over 3 h, extrusion ratio is between 90 and 100, die land length is 1.5mm, extrusion speed is about 5 m/min.The utilization ratio of material improves by 10% compared with conventional extrusion and production efficiency improves by about 40%.