Preparation of heat-resistant aluminum alloy pipe blanks by multi-layer spray deposition
来源期刊：中国有色金属学报(英文版)2000年第4期
论文作者：袁武华 陈振华 黄培云
文章页码：460 - 464
Key words：heat-resistant aluminum alloy; pipe blanks; spray deposition; rapid solidification
Abstract: A heat-resistant aluminum alloy pipe blank with dimensions of d700/300 mm×1 200 mm was prepared by the multi-layer spray deposition technology. Optical microscopy, X-ray diffractometry and transmission electron microscopy were used to analyze its morphologies and microstructures. The results show that the microstructures of the pipe blank are homogeneous and the precipitates are uniformly-distributed d25~70nm spherical or sphere-like Al12(Fe,V)3Si particles, its mechanical properties at room temperature and 350℃ after densification by extrusion are σb=412MPa,δ=7.6% and σb=187MPa,δ=7.6%, respectively. The analyses indicate that the proper match of the motion rates of atomizer and substrate can produce deposited blanks with uniform thickness and relatively high cooling rate.
