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SCIENCE CHINA Technological Sciences, Volume 61 , Issue 12 : 1901-1906(2018) https://doi.org/10.1007/s11431-018-9293-9

Microstructure and properties of nitrided layer of titanium plate, produced by simultaneous laser quenching and liquid-nitrogen cryogenics

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  • ReceivedApr 11, 2018
  • AcceptedMay 25, 2018
  • PublishedNov 20, 2018

Abstract

In the present study, titanium plate was treated by a novel method of laser quenching, simultaneously combined with liquid-nitrogen cryogenics (LQLNC). The microstructure and properties of the titanium plate after treatment were investigated by X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry, Vickers hardness testing, and friction wear testing. The results show that the treated titanium plate is covered by a nitrided layer with a homogeneous thickness of about 60 μm, while the nitrided layer consists of TiN and α-Ti phases. Compared to general laser quenching, the LQLNC treatment increases the hardness and wear resistance of the surface-modified layer of the titanium plate. As a result of grain refinement in the nitrided layer, the cracking induced by the rapid solidification of the conventional laser-quenching process has also been effectively solved.


Funded by

the National High Technology Research and Development Program(Grant,No.,2012AA03A508)

and the National Natural Science Foundation of China(Grant,No.,U1360102,51275344)


Acknowledgment

This work was supported by the National High Technology Research and Development Program of China (Grant No. 2012AA03A508), and the National Natural Science Foundation of China (Grant Nos. U1360102, 51275344).


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