In Situ Synthesis of TiC-TiB2 Reinforced Fe-Based Composite Coating by Laser Cladding

2013 ◽  
Vol 341-342 ◽  
pp. 162-165 ◽  
Author(s):  
Fang Zhou ◽  
Hui Yao Yang ◽  
Liang Hua He
Keyword(s):  
Mechanical Properties ◽  
Composite Coating ◽  
Laser Cladding ◽  
Microstructure And Mechanical Properties

A Fe-based composite coating reinforced with in situ synthesized TiC-TiB2particles was successfully fabricated on Q235A by laser cladding with mixture powder of TiO2, Al, B4C, C and Fe55 as precursors. The microstructure and mechanical properties of coating were investigated. The results show that the main phases of coating are TiB2, TiC, (Fe,Cr)7C3and α-Fe. TiC particles show the shape of block, TiB2particles exhibit the shape of strip. Compared with the Q235A, the microhardness of the composite coating improved drastically.

Effects of Y2O3 on Microstructure and Mechanical Properties of Laser Clad Coatings Reinforced by In Situ Synthesized TiB and TiC

2011 ◽  
Vol 675-677 ◽  
pp. 589-592 ◽  
Author(s):  
Jun Li ◽  
Zhi Shui Yu ◽  
Hui Ping Wang
Keyword(s):  
Mechanical Properties ◽  
Laser Cladding ◽  
Volume Fraction ◽  
Fine Needle ◽  
Microstructure And Mechanical Properties ◽  
Y2o3 Addition ◽  
Cracking Sensitivity

Titanium-based coatings reinforced by in situ synthesized TiB and TiC were deposited on Ti6Al4V by laser cladding. The effects of Y2O3 on microstructure and mechanical properties of the coatings were investigated. The coating without Y2O3 is mainly composed of a-Ti cellular dendrites and an eutecticum in which a large number of coarse and fine needle-shaped TiB and a few equiaxial TiC particles are homogeneously embedded. A small amount of Y2O3 addition can refine the microstructure by transforming a-Ti grains from cellular dendrites to columnar or equiaxial crystals, and can increase the volume fraction of the reinforcements. The addition of Y2O3 can also increase microhardness and reduce the cracking sensitivity of the coating.

Microstructure and mechanical properties of in situ (Ti, Nb)Cp/Fe-based laser composite coating prepared with different heat inputs

Rare Metals ◽  
2016 ◽  
Vol 37 (10) ◽  
pp. 852-858 ◽  
Author(s):  
Qing-Tang Li ◽  
Yong-Ping Lei ◽  
Han-Guang Fu ◽  
Zhong-Wei Wu ◽  
Jian Lin
Keyword(s):  
Mechanical Properties ◽  
Composite Coating ◽  
Microstructure And Mechanical Properties
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