...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Philosophical Magazine Letters >Microstructure characterisation ofin-situsynthesised TiC/Ti6Al4 V composite coating by laser cladding
【24h】

Microstructure characterisation ofin-situsynthesised TiC/Ti6Al4 V composite coating by laser cladding

机译：激光包层原位合成的TiC / Ti6A14V复合涂层的微观结构表征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A TiC/Ti6Al4V composite coating was prepared by laser cladding and the microstructure and the microhardness of different areas of the coating were studied. The results showed that anin-situsynthesis between graphene and Ti occurred during the laser cladding process and TiC was formed. At the top of the coating, the amount of TiC formed was less and it was not homogeneously distributed. In the middle of the coating, TiC was homogeneously distributed and the number of TiC particles was significantly higher. Because of the rapid cooling rate at the top, many of the nucleated TiC particles did not grow significantly. The TiC was fully grown in the middle because of lower heat dissipation and a relatively slow cooling rate; furthermore, convection of the molten pool promoted the homogeneous distribution of TiC in the middle of the cladded coating. Compared with the middle part of the coating, the coating bonded well with the Ti6Al4V matrix at the bottom of the coating. Moreover, alpha' acicular martensite was formed during the rapid solidification process in the heat-affected zone (HAZ). The TiC and the alpha-Ti phase displayed an orientation relationship extremely close to [-2 -2 0] TiC // [2 -4 0 2] alpha-Ti. The hardness of the TiC/Ti6Al4V composite coating was 57% higher than that of the Ti6Al4V matrix, with the hard TiC particles played a strengthening role.
机译：采用激光熔覆法制备了TiC/Ti6Al4V复合涂层，研究了涂层不同区域的显微组织和显微硬度。结果表明，在激光熔覆过程中，石墨烯与钛发生了原位合成反应，形成了TiC。在涂层顶部，形成的TiC数量较少，且分布不均匀。在涂层中间，TiC均匀分布，TiC颗粒的数量明显增多。由于顶部的快速冷却速度，许多有核TiC颗粒没有显著生长。由于热耗散较低，冷却速度相对较慢，TiC完全生长在中间；此外，熔池对流促进了TiC在熔覆层中间的均匀分布。与涂层中部相比，涂层与涂层底部的Ti6Al4V基体结合良好。此外，在热影响区（HAZ）的快速凝固过程中形成了α'针状马氏体。TiC和alpha-Ti相的取向关系非常接近[-2-20]TiC/[2-40]alpha-Ti。TiC/Ti6Al4V复合涂层的硬度比Ti6Al4V基体高57%，硬质TiC颗粒起到了强化作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号