MICROSTRUCTURE AND DRY SLIDING WEAR RESISTANCE OF LASER CLADDING Ti-Al-Si COMPOSITE COATING

被引：9
作者：
Zhang, H. X. [1 ,3 ,4 ]
Yu, H. J. [1 ,2 ]
Chen, C. Z. [1 ,3 ]
Dai, J. J. [1 ,3 ,4 ]
机构：
[1] Shandong Univ, Suzhou Inst, Suzhou 215123, Peoples R China
[2] Shandong Univ, Sch Mech Engn, Minist Educ, Key Lab High Efficiency & Clean Mech Mfg, Jinan 250061, Shandong, Peoples R China
[3] Shandong Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China
[4] Qingdao Binhai Univ, Sch Mech & Elect Engn, Qingdao 266555, Peoples R China
来源：
SURFACE REVIEW AND LETTERS | 2017年 / 24卷
关键词：
Laser cladding; Ti-6Al-4V; microstructure; hardness; wear; TRIBOLOGICAL PROPERTIES; TI-6AL-4V ALLOY; PURE TI; TITANIUM; TI3AL;
D O I：
10.1142/S0218625X18500099
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In order to improve the wear resistance of Ti alloys, different mass ratios of Ti-Si-Al powders were designed to fabricate hard phases reinforced intermetallic matrix composite coatings on the Ti-6Al4V substrate by laser cladding. The corresponding coatings were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and high resolution transmission microscopy (HRTEM). The HV-1000 hardness tester and MM200 wear test machine were employed to test the hardness and the wear resistance of the composite coatings, respectively. The composite coatings mainly consisted of the reinforcements of Ti5Si3, Ti3AlC2 and Ti7Al5Si12 and the matrix of Ti3Al, TiAl, TiAl3 and alpha-Ti. The micro-hardness of the Ti-35Al-15Si coating was from 956 HV0.2 to 1130 HV0.2, which was approximately 3-4 times of the substrate and the highest in the three samples. The wear rate of the Ti-35Al-15Si coating was 0.023 cm(3).min(-1), which was about 1/4 of the Ti-6Al-4V substrate. It was the lowest in the three samples.
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页数：10
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