INFLUENCE OF Cu ON MICROSTRUCTURES AND WEAR RESISTANCE OF STELLITE 12 MATRIX LASER ALLOYING COATINGS ON TA15-2 TITANIUM ALLOY

doi:10.3724/SP.J.1037.2013.00458

Acta Metall Sin

2014, Vol. 50

Issue (5): 547-554 DOI: 10.3724/SP.J.1037.2013.00458

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INFLUENCE OF Cu ON MICROSTRUCTURES AND WEAR RESISTANCE OF STELLITE 12 MATRIX LASER ALLOYING COATINGS ON TA15-2 TITANIUM ALLOY

LI Jianing^1,², GONG Shuili¹(

), WANG Juan³, SHAN Feihu¹, LI Huaixue¹, WU Bing¹

1 Science and Technology on Power Beam Processes Laboratory, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024
2 Beijing Institute of Aeronautical Materials, Beijing 100095
3 School of Materials Science and Engineering, Shandong University, Jinan 250061

Cite this article:

LI Jianing, GONG Shuili, WANG Juan, SHAN Feihu, LI Huaixue, WU Bing. INFLUENCE OF Cu ON MICROSTRUCTURES AND WEAR RESISTANCE OF STELLITE 12 MATRIX LASER ALLOYING COATINGS ON TA15-2 TITANIUM ALLOY. Acta Metall Sin, 2014, 50(5): 547-554.

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Abstract

Coaxial powder feeding laser alloying of the Stellite 12-B₄C mixed powders on an aviation material TA15-2 titanium alloy substrate can form a wear resistance composite coating. Investigation indicated that the Cu addition promoted a great quantity of the ultrafine nanoscale polycrystals and amorphous phases to be produced in such coating, leading to an improvement of wear resistance. The nanocrystallization process of Cu on laser clad coatings, i.e. and the process of the productions of the nanoscale polycrystals, and also the AlCu₂Ti ultrafine nanocrystals which were produced through in situ chemical reaction in laser molten pool retarded greatly growth of the particles. The coating with Cu mainly consisted of γ-Co, M₁₂C, M₂₃C₆, W-C, Ti-B, AlCu₂Ti and also the amorphous phases. AlCu₂Ti ultrafine nanocrystals owned the high diffusibility in such high temperature molten pool, causing the lattice distortions, which also played an important amorphization effect on such coating.

Key words: laser alloying surface reinforcement wear property amorphous nanocrystal

Received: 29 July 2013

ZTFLH:

TG132

Fund: Supported by National Natural Science Foundation of China (No.51175035) and China Postdoctoral Science Fuondation Funded Project (No.2012M520135)

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	Jianing LI
	Shuili GONG
	Juan WANG
	Feihu SHAN
	Huaixue LI
	Bing WU

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2013.00458 OR https://www.ams.org.cn/EN/Y2014/V50/I5/547

Fig.1

样品1与2中激光合金化层的SEM像

Fig.2

样品2中涂层宏观SEM像与EDS图

Fig.3

样品2中涂层的TEM像及其对应的SAED谱与HRTEM像

Fig.4

样品1与2中激光合金化涂层的XRD谱

Fig.5

样品2中涂层的TEM像和SAED谱

Fig.6

样品1与2中激光合金化涂层的显微硬度分布

Fig.7

涂层的摩擦系数随时间和载荷量变化曲线

Fig.8

基材与激光合金化涂层磨损体积随时间变化

Fig.9

TA15-2合金与涂层的磨损形貌

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