Microstructure and properties of laser clad TiC+NiCrBSi plus rare earth composite coatings
Microstructure and properties of laser clad TiC+NiCrBSi plus rare earth composite coatings
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DOI：
10.1016/s0257-8972(02)00496-6
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发表时间：
2002-12-02
影响因子：
5.4
通讯作者：
Qu, SY
中科院分区：
文献类型：
--
作者：
Wang, XH;Zhang, M;Qu, SY
采用激光熔覆技术在AISI4140铬钼合金钢表面熔覆TiC颗粒增强镍基合金复合涂层。采用扫描电子显微镜、透射电子显微镜和磨损试验等手段对涂层的组织和摩擦学性能进行了实验研究。在加热阶段，TiC颗粒在激光熔池中发生部分溶解。在TiC颗粒与基体的界面处观察到孪晶和位错。耐磨性与熔覆层中TiC颗粒的含量和载荷有关。La-03的加入显著提高了熔覆层的硬度，提高了熔覆层的耐磨性。(C)2002 Elsevier Science B.V.保留所有权利。
TiC particle reinforced Ni-based alloy composite coatings were clad to AISI 4140 chromium molybdenum alloy steel substrate using a laser. The microstructure and tribological behavior of coatings were studied experimentally by means of scanning electron microscopy, transmission electron microscopy and wear tests. Partial solution of TiC particles occurs in the laser melting pool during the heating stage. Twins and dislocations were observed at the interface of TiC particles and the matrix. The wear resistance was found to correlate with the load and amount of the TiC particles present in the clad layer. By adding La,03, the hardness of clad coatings was significantly increased, and the wear resistance of clad coatings was enhanced. (C) 2002 Elsevier Science B.V. All rights reserved.