Laser surface engineering of steel for hard refractory ceramic composite coating
Laser surface engineering of steel for hard refractory ceramic composite coating
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DOI：
10.1016/s0263-4368(98)00063-8
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发表时间：
1999-01-01
影响因子：
3.6
通讯作者：
Dahotre, NB
中科院分区：
文献类型：
--
作者：
Agarwal, A;Dahotre, NB
采用激光表面改性技术在1010钢表面存款沉积TiB（2）超硬陶瓷涂层。获得了均匀、连续、无裂纹的涂层，具有良好的界面。涂层本质上是“复合物”，在激光熔化区中包含TiB（2）颗粒和Fe。激光熔凝区均匀分布着多晶和针状硼化物颗粒。界面显微组织由胞状树枝晶和细小的等轴树枝晶组成。还观察到诸如Fe（x）B（y）和Ti（m）B（n）的亚稳相，这是通过激光能量的非平衡合成的特征。激光熔化区具有很高的硬度。然而，硬度在层中不均匀。(C)1999爱思唯尔科技有限公司。保留所有权利。
Laser surface modification technique is applied to deposit ultrahard ceramic (TiB(2)) coating on 1010 steel. A uniform, continuous and crack free coating with a metallurgically sound interface is obtained. Coating is "composite" in nature comprising TiB(2) particles and Fe in the laser melt zone. Polygonal and needle shaped boride particles are uniformly distributed in the laser melted zone. The interfacial microstructure consists of cellular dendrites and fine equiaxed dendrites. Metastable phase(s) such as Fe(x)B(y) and Ti(m)B(n) are also observed which is a characteristic feature of non-equilibrium synthesis by laser energy. Laser melt zone has a high hardness. However, hardness is not uniform in the layer. (C) 1999 Elsevier Science Ltd. All rights reserved.