期刊论文

中文

激光与红外

1001-5078

2010

40

5

459-462

10.3969/j.issn.1001-5078.2010.05.002

湖南省自然科学基金项目（No.05JJ30092） 湖南省高等学校科学研究项目（No.09C856）资助

本校为第一机构

将高纯度的C,BN机械混合粉末预涂在TC4钛合金表面,采用5 kW横流CO2激光器进行激光熔覆,原位生成高硬度复合涂层.利用光学显微镜(OM)、扫描电镜(SEM)和能量弥散X射线探测器(EDXs)等观察和分析熔覆层的微观组织和成分,测试了熔覆层的硬度.结果表明,以C,BN机械混合粉末为原料,利用激光熔覆原位生成技术生成了树枝晶状的复合熔覆层,熔覆层与基体冶金结合.熔覆层显微硬度值最高可达1454 HV0.5,显著地提高了TC4合金的硬度.

The mechanical mixed C＋BN powders were cladded on the surface of TC4 alloys by transverse flow CO2 laser,and hard composite coating was in-situ formatted.The microstructure of clad layers were observed and analyzed by Optical Microscope（OM）,Scanning Electronic Microscope（SEM）and Energy Dispersive X-ray spectroscope（EDXs）.The microhardness of clad layers was measured.The results show that clad layers with fine interdendritic crystal are in-situ formed successfully by laser cladding with the precursor mixture of carbon,boron nitride（C＋BN...