摘要
利用激光熔覆工艺在中碳钢表面制备出原位自生TiB2-TiB/Fe复相金属陶瓷复合涂层,以改善常规材料表面综合使用性能.采用XRD、SEM、EDS、EPMA等手段对复合涂层进行了研究.结果表明:复合涂层主要由(Fe,C)固溶体胞状树枝晶及分布于晶间的TiB2/Fe或TiB/Fe共晶组成,部分Fe2B相也会出现在晶间.涂层成分不同时,陶瓷增强相的含量将发生变化.涂层力学性能较基体有显著提高.
In-situ synthesized TiB_2-TiB/Fe multiphase metal-ceramics composite coating has been fabricated on medium carbon steel surface by laser cladding in order to improve the comprehensive practical properties of the conventional material. Studies of composite coating were carried out by means of XRD, SEM, EDS, EPMA. Results show that the main phase in the coating is (Fe,C) solid solution dendrite with eutectic structure of TiB_2/Fe or TiB/Fe distributing in intergranular. Part of Fe_2B phase appears in intergranular too. The amount of reinforcement ceramic phase varies with chemical composition of the coating. Mechanics property of the coating increases prominently compared to the substrate.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2004年第6期798-801,共4页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(59701001).
