铸造技术2017，Vol.38Issue(12)：2805-2808,2824,5.DOI:10.16410/j.issn1000-8365.2017.12.004
激光高速熔凝Ni-33％Sn过共晶合金组织演化
Microstructure Evolution of Ni-33％Sn Hypereutectic Alloy in Laser Rapid Solidification
摘要
Abstract
The microstructure evolution of Ni-33％Sn hypereutectic alloy during high-speed laser remelted by continuous laser and pulsed laser had been investigated.The results show that after continuous laser remelted,the microstructure consists of (α-Ni+β-Ni3Sn) eutectic,β-Ni3Sn dentritic and partly remelted β-Ni3Sn particles,whereas it consists of (α-Ni+β-Ni3Sn)eutectic after continuous laser remelted.The lamellar eutectic spacing decreases with increasing the scanning velocity,and the lamellar eutectic spacing is reduced significantly after laser rapid solidification.The transition from regular eutectic to irregular anomalous eutectic structure has not appeared when the scanning velocity reach 1 000 mm/s,combine with TMK model and the undercooling under the same growth velocity,revealing that rapid growth is not the sufficient conditions for the formation of anomalous eutectic.关键词
激光高速熔凝/Ni-33％Sn合金/组织演化Key words
laser rapid solidification/Ni-33％Sn alloy/microstructure evolution分类
矿业与冶金引用本文复制引用
汪志太,林鑫,曹永青,黄卫东..激光高速熔凝Ni-33％Sn过共晶合金组织演化[J].铸造技术,2017,38(12):2805-2808,2824,5.基金项目
国家自然科学基金资助项目(51323008,51475380,51271213) （51323008,51475380,51271213）
国家重点基础研究发展计划资助项目(2011CB610402) （2011CB610402）
国家高技术研究发展计划资助项目(201AA031103) （201AA031103）
高等学校博士学科点转向科研基金(20116102110016) （20116102110016）
中国高等学校学科创新引智计划资助项目(08040) （08040）
