TiC particulate composite coating produced in situ by laser cladding

被引：65

作者：

Yang, S ^{[1
]}

Zhong, ML

Liu, WJ

机构：

[1] Tsing Hua Univ, Dept Mech Engn, Beijing 100084, Peoples R China

[2] Inner Mongolia Polytech Univ, Dept Mat Sci & Engn, Hohhot 010062, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 343卷 / 1-2期

基金：

中国博士后科学基金;

关键词：

in situ formation; nickel based alloy; gradient distribution; laser cladding; TiC particle;

D O I：

10.1016/S0921-5093(02)00361-1

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A composite coating with TiC particles of various shapes and sizes embedded in nickel based alloy has been in situ synthesized by laser melting a precursor mixture of nickel based alloy powder, graphite and titanium powders. The experiment result showed that the coating epitaxially grew from the substrate with excellent bonding between the coating and the carbon steel substrate. The coating is uniform, continuous and free of pores and cracks, and about 0.6 mm thick. The microstructure of the coating is mainly composed of gamma-Ni dendrite, a small amount of interdendritic (gamma-Ni+M23C6) eutectic, and dispersed TiC particles. The volume fraction of TiC particles and the microhardness gradually increased from the bottom to the top of the coating layer. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：57 / 62

页数：6

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