Laser cladding for high-temperature self-lubricating wear-resistant composite coatings on γ-TiAl intermetallic alloy Ti-48Al-2Cr-2Nb

被引:4
作者
Liu, XB [1 ]
Wang, CM [1 ]
Yu, LG [1 ]
Wang, HM [1 ]
机构
[1] Beijing Univ Aeronaut & Astronaut, Lab Laser Mat & Surface Engn, Beijing 100083, Peoples R China
来源
HIGH-POWER LASERS IN MANUFACTURING | 2000年 / 3888卷
关键词
gamma-TiAl intermetallic alloy; high-temperature wear-resistant composite coatings; laser cladding; self lubrication;
D O I
10.1117/12.377035
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
High-temperature self-lubricating wear-resistant metal matrix composite coating are fabricated on substrate of a gamma-TiAl intermetallic alloy Ti-48Al-2Cr-2Nb by laser cladding. The hybrid gamma-NiCr metal matrix composite coating is mainly reinforced by rapidly solidified wear-resistant phase of hyper-eutectic M7C3 and self-lubricating particles of Ag and CaF2 or CaAgF4. Microstructure and hardness within the whole laser clad composite coating is homogeneous and the bonding to the substrate is purely metallurgical. Both hardness and dry sliding wear resistance of the gamma-TiAl intermetallic alloy are significantly enhanced after laser cladding treatment.
引用
收藏
页码:312 / 317
页数:6
相关论文
共 14 条
[1]  
CHESNUTT JC, 1992, SUPERALLOYS 1992, P381
[2]  
He Xiuli, 1998, Acta Metallurgica Sinica, V34, P983
[3]   MICROSTRUCTURAL EVOLUTION AND MECHANICAL-PROPERTIES OF A FORGED GAMMA-TITANIUM ALUMINIDE ALLOY [J].
KIM, YW .
ACTA METALLURGICA ET MATERIALIA, 1992, 40 (06) :1121-1134
[4]  
LIU XB, 1999, IN PRESS SPIE, V3682
[5]   Hard surfacing of TiAl intermetallic compound by plasma carburization [J].
Noda, T ;
Okabe, M ;
Isobe, S .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1996, 213 (1-2) :157-161
[6]  
WANG HM, ACTA METALL SIN, V33, P917
[7]  
WANG HM, 1998, P 1 AIS INT C TRIB, P603
[8]  
Wang Huaming, 1997, Chinese Journal of Lasers, VA24, P1049
[9]   Sliding wear properties of TiAl alloys with/without TiN coatings [J].
Wang, Y ;
Qian, Z ;
Li, XY ;
Tandon, KN .
SURFACE & COATINGS TECHNOLOGY, 1997, 91 (1-2) :37-42
[10]  
XU D, 1993, SURFACE COATINGS TEC, V61, P338