| 摘要: |
| 选用NiCrBSi及2 %B4C混粉在Ti6Al4V合金表面进行激光熔覆处理，使基体中的Ti和B4C发生化学反应原位生成TiC、TiB2硬质增强相，制备出TiC与TiB2等增强相增强钛基复合材料涂层。综合运用XRD、SEM、EPMA和TEM等分析手段研究了优化熔覆工艺条件下的NiCrBSi+B4C激光熔覆层的组织结构与相组成，并对复合涂层进行了硬度测试，结果表明：NiCrBSi+2 %B4C熔覆层的微观组织是在γ–Ni和Ni3Ti+Ni3B共晶的基体上均匀分布着TiB2、TiC、CrB等相的多元组织，激光熔覆层的硬度比Ti6Al4V基体硬度提高到3~4倍。 |
| 关键词: 激光熔覆 NiCrBSi合金 复合涂层 组织结构 Ti6Al4V |
| DOI： |
| 分类号: |
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| The Laser Cladding Composite Coating of NiCrBSi+B4C on Ti6Al4V Alloy Substrate |
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FAN Xiao-hong，GENG Lin1,2
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1. Department of Material, Shandong Institute of Architecture and Engineering, Jinan 250101;2. School of Materials,Harbin Institute of Technology, Harbin 150001
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| Abstract: |
| The laser cladding NiCrBSi+2 %B4C coating on Ti6Al4V alloy with was described in this paper, The microstructure of (TiC+TiB2 ) reinforced titanium matrix composite was analyzed using XRD, SEM, EPMA and TEM, the microhardness of the cladding layers were measured. The results showed that the microstructure of NiCrBSi+2 %B2C cladding layer consists of primary γ–Ni, eutectic of Ni3Ti+Ni3B, and uniformly dispersed phases of TiB2, TiC and CrB. The microhardness of NiCrBSi+2 %B4C cladding layer is 3~4 times that of the Ti6Al4V substrate. |
| Key words: laser cladding NiCrBSi alloy composite coating |
