液态模锻与分层制造技术  

Liquid Die Forging and Laminated Manufacturing Technology

作　　者：罗守靖[1] 姜巨福[1] 孙锐[1] 

机构地区：[1]哈尔滨工业大学,哈尔滨150001

出　　处：《中国机械工程》2005年第7期634-636,共3页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50075018)

摘　　要：以航天巡航导弹的成形工艺为研究对象,结合液态模锻与分层制造,提出逐层浇注—累积液锻成形技术。研究表明,分层制造的层厚愈薄愈好,而逐层浇注—累积液锻的层厚受层间结合影响,一般在保证层间结合为冶金结合的前提下,选取较小的厚度为佳;通过高径比为1.8的筒形薄壁件成形实例说明,当层数为3,层厚为44mm,模具温度460℃,浇注温度780℃,加压前停留时间为4s,施加压力为800kN(比压为212.6MPa),保压时间为5s时,获得了很好的冶金结合效果,其抗拉强度σb=378MPa,延伸率δ=8.6%,接近锻件,远高于铸件。This paper was based on manufacturing technology of capsule components of cruise missiles. Laminated pouring and accumulated liquid forging technology was put forward. The results show that the thickness thinner, the quality better in laminated manufacturing of complex objects, on the other hand, the thickness should be thicker to get strong bonding on interface between solidified layer and liquid layer. Barrel components with 1.8 altitude and diameter ratio were studied. The results illustrate that when the processing technological parameters are 3 layers, thickness of 44 mm, die temperature of 460°C, pouring temperature of 780°C, standing time of 4 s, pressure of 800 KN (specific pressure of 212.6 MPa) and dwell time of 5 s, the interface bonding is very strong and the mechanical properties (σb=378 MPa, δ=8.6%) approach to forgings and much higher than castings.

关 键 词：液态模锻 分层制造 高径比 简形件 

分 类 号：TG146.3[一般工业技术—材料科学与工程]