Laser cladding of in situ TiB2/Fe composite coating on steel

被引：90

作者：

Du, Baoshuai ^{[1
]}

Zou, Zengda ^{[1
]}

Wang, Xinhong ^{[1
]}

Qu, Shiyao ^{[1
]}

机构：

[1] Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2008年 / 254卷 / 20期

关键词：

in situ; TiB(2)/Fe composite coating; laser cladding; ferrotitanium; ferroboron;

D O I：

10.1016/j.apsusc.2008.04.051

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：

To enhance the wear resistance of mechanical components, laser cladding has been applied to deposit in situ TiB(2)/Fe composite coating on steel using ferrotitanium and ferroboron as the coating precursor. The phase constituents and microstructure of the composite coating were investigated using X-ray diffraction (XRD), scanning electron micrograph (SEM) and electron probe microanalysis (EPMA). Microhardness tester and block-on-ring wear tester were employed to measure themicrohardness and dry-sliding wear resistance of the composite coating. Results show that defect- free composite coating with metallurgical joint to the steel substrate can be obtained. Phases presented in the coating consist of TiB(2) and alpha-Fe. TiB(2) particles which are formed in situ via nucleation-growth mechanism are distributed uniformly in the alpha-Fe matrix with blocky morphology. The microhardness and wear properties of the composite coating improved significantly in comparison to the as-received steel substrate due to the presence of the hard reinforcement TiB(2). (C) 2008 Elsevier B. V. All rights reserved.

引用

页码：6489 / 6494

页数：6

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