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Research Papers: Friction and Wear

Effect of Molybdenum on the Wear Properties of (Ti,Mo)C-TiB2-Mo2B Particles Reinforced Fe-Based Laser Cladding Composite Coatings

[+] Author and Article Information
M. Zhang

School of Mechanical Engineering,
Shandong University,
Jinan 250061, China

S. X. Luo, S. S. Liu

School of Materials Science and Engineering,
Shandong University,
Jinan 250061, China

X. H. Wang

School of Materials Science and Engineering,
Shandong University,
Jinan 250061, China
e-mail: xhw1970@163.com

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received November 30, 2017; final manuscript received February 6, 2018; published online April 3, 2018. Assoc. Editor: Sinan Muftu.

J. Tribol 140(5), 051603 (Apr 03, 2018) (7 pages) Paper No: TRIB-17-1463; doi: 10.1115/1.4039411 History: Received November 30, 2017; Revised February 06, 2018

(Ti,Mo)C, TiB2, and Mo2B particles reinforced Fe-based composite coatings were fabricated by laser cladding process. The effects of Molybdenum (Mo) on the microstructure and wear properties of the coatings were investigated. The results show that block-like or cuboidal TiB2, Mo2B and flower-like (Ti, Mo)C ceramics reinforcements were formed in the coatings. The size of reinforcements reduced with the increasing of FeMo70. However, cracks were found in the coating, while the addition of FeMo70 exceeded 9 wt %. The laser cladding coating presented a good wear resistance with a 9 wt % addition of FeMo70. With the increasing of FeMo70, the coatings enhanced the capability of resisting microcutting, microplowing, and surface plastic deformation.

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Figures

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Fig. 1

Typical morphology of the laser cladding coating of sample S3 and interface: (a) cross-sectional view; (b) microstructure of bonding region between coating and the substrate; and (c) enlargement of interfacial transition zone A in Fig. 1(b)

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Fig. 2

XRD results of laser cladding coatings

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Fig. 3

Typical morphology of the cladding coating of sample S3: (a) morphology of the coating and (b) enlarged area A in Fig. 3(a)

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Fig. 4

EDS of analysis of sample S3: (a) EDS of P1 in Fig. 3(a); (b) EDS of P2 in Fig. 3(a); (c) EDS of P3 in Fig. 3(b); and (d) EDS of P4 in Fig. 3(b)

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Fig. 5

TEM morphologies of ceramics phase in the coating of sample S3: (a) flower-like particles; (b) block-like particles; (c) selected area diffraction pattern of particle A; (d) selected area diffraction pattern of particle B; (e) interface morphology of (Ti,Mo)C/matrix; and (f) interface morphology of TiB2/matrix

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Fig. 6

The secondary electrons' morphologies of the coatings: (a) sample S0; (b) sample S1; (c) sample S2; (d) sample S3; and (e) sample S4

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Fig. 7

Microhardness of the cladding coatings: (a) microhardness distribution along cross section for the sample S3 and (b) the averaged microhardness of the coatings

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Fig. 8

Wear mass loss of the substrate and cladding coatings at room temperature

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Fig. 9

Wear scar of the substrate and cladding coatings: (a) substrate; (b) sample S0; (c) sample S1; (d) sample S2; (e) sample S3; and (f) sample S4

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